{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T13:30:21Z","timestamp":1770816621130,"version":"3.50.1"},"reference-count":67,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2022,1,11]],"date-time":"2022-01-11T00:00:00Z","timestamp":1641859200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Research Agency of the Slovak Republic, Operational Program Integrated Infrastructure","award":["\"MonCovid\" ITMS code: 313010ASX4"],"award-info":[{"award-number":["\"MonCovid\" ITMS code: 313010ASX4"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The whole world is currently focused on COVID-19, which causes considerable economic and social damage. The disease is spreading rapidly through the population, and the effort to stop the spread is entirely still failing. In our article, we want to contribute to the improvement of the situation. We propose a tracking system that would identify affected people with greater accuracy than medical staff can. The main goal was to design hardware and construct a device that would track anonymous risky contacts in areas with a highly concentrated population, such as schools, hospitals, large social events, and companies. We have chosen a 2.4 GHz proprietary protocol for contact monitoring and mutual communication of individual devices. The 2.4 GHz proprietary protocol has many advantages such as a low price and higher resistance to interference and thus offers benefits. We conducted a pilot experiment to catch bugs in the system. The device is in the form of a bracelet and captures signals from other bracelets worn at a particular location. In case of contact with an infected person, the alarm is activated. This article describes the concept of the tracking system, the design of the devices, initial tests, and plans for future use.<\/jats:p>","DOI":"10.3390\/s22020526","type":"journal-article","created":{"date-parts":[[2022,1,11]],"date-time":"2022-01-11T20:33:04Z","timestamp":1641933184000},"page":"526","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Research and Development of a COVID-19 Tracking System in Order to Implement Analytical Tools to Reduce the Infection Risk"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0981-5949","authenticated-orcid":false,"given":"Erik","family":"Vavrinsky","sequence":"first","affiliation":[{"name":"Institute of Electronics and Photonics, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovicova 3, 81219 Bratislava, Slovakia"},{"name":"Institute of Medical Physics, Biophysics, Informatics and Telemedicine, Faculty of Medicine, Comenius University, Sasinkova 2, 81272 Bratislava, Slovakia"}]},{"given":"Tomas","family":"Zavodnik","sequence":"additional","affiliation":[{"name":"Institute of Electronics and Photonics, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovicova 3, 81219 Bratislava, Slovakia"}]},{"given":"Tomas","family":"Debnar","sequence":"additional","affiliation":[{"name":"Institute of Electronics and Photonics, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovicova 3, 81219 Bratislava, Slovakia"}]},{"given":"Lubos","family":"Cernaj","sequence":"additional","affiliation":[{"name":"Institute of Electronics and Photonics, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovicova 3, 81219 Bratislava, Slovakia"}]},{"given":"Jozef","family":"Kozarik","sequence":"additional","affiliation":[{"name":"Institute of Electronics and Photonics, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovicova 3, 81219 Bratislava, Slovakia"}]},{"given":"Michal","family":"Micjan","sequence":"additional","affiliation":[{"name":"Institute of Electronics and Photonics, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovicova 3, 81219 Bratislava, Slovakia"}]},{"given":"Juraj","family":"Nevrela","sequence":"additional","affiliation":[{"name":"Institute of Electronics and Photonics, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovicova 3, 81219 Bratislava, Slovakia"}]},{"given":"Martin","family":"Donoval","sequence":"additional","affiliation":[{"name":"Institute of Electronics and Photonics, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovicova 3, 81219 Bratislava, Slovakia"}]},{"given":"Martin","family":"Kopani","sequence":"additional","affiliation":[{"name":"Institute of Medical Physics, Biophysics, Informatics and Telemedicine, Faculty of Medicine, Comenius University, Sasinkova 2, 81272 Bratislava, Slovakia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8384-3510","authenticated-orcid":false,"given":"Helena","family":"Kosnacova","sequence":"additional","affiliation":[{"name":"Department of Simulation and Virtual Medical Education, Faculty of Medicine, Comenius University, Sasinkova 4, 81272 Bratislava, Slovakia"},{"name":"Department of Genetics, Cancer Research Institute, Biomedical Research Center, Slovak Academy Sciences, Dubravska Cesta 9, 84505 Bratislava, Slovakia"}]}],"member":"1968","published-online":{"date-parts":[[2022,1,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"108427","DOI":"10.1016\/j.clim.2020.108427","article-title":"COVID-19 pathophysiology: A review","volume":"215","author":"Yuki","year":"2020","journal-title":"Clin. Immunol."},{"key":"ref_2","unstructured":"(2021, October 11). Coronavirus Worldometers. Available online: https:\/\/www.worldometers.info\/coronavirus\/."},{"key":"ref_3","unstructured":"WHO (2021, October 13). Coronavirus Disease (COVID 19). Available online: https:\/\/www.who.int\/emergencies\/diseases\/novel-coronavirus-2019."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"404","DOI":"10.1016\/j.jmii.2020.02.012","article-title":"Asymptomatic carrier state, acute respiratory disease, and pneumonia due to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2): Facts and myths","volume":"53","author":"Lai","year":"2020","journal-title":"J. Microbiol. Immunol. Infect."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"244","DOI":"10.1109\/TCE.2021.3130228","article-title":"Coviddeep: SARS-CoV-2\/COVID-19 Test Based on Wearable Medical Sensors and Efficient Neural Networks","volume":"67","author":"Hassantabar","year":"2020","journal-title":"IEEE Trans. Consum. Electron."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"497","DOI":"10.1016\/S0140-6736(20)30183-5","article-title":"Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China","volume":"395","author":"Ramanathan","year":"2020","journal-title":"Lancet"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"782","DOI":"10.1001\/jama.2020.12839","article-title":"Pathophysiology, Transmission, Diagnosis, and Treatment of Coronavirus Disease 2019 (COVID-19): A Review","volume":"324","author":"Wiersinga","year":"2020","journal-title":"JAMA-J. Am. Med. Assoc."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1016\/j.ceh.2020.03.001","article-title":"Chinese experts\u2019 consensus on the Internet of Things-aided diagnosis and treatment of coronavirus disease 2019 (COVID-19)","volume":"3","author":"Bai","year":"2020","journal-title":"Clin. eHealth"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"102149","DOI":"10.1016\/j.bspc.2020.102149","article-title":"An IoT-based framework for early identification and monitoring of COVID-19 cases","volume":"62","author":"Otoom","year":"2020","journal-title":"Biomed. Signal Process. Control"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"17457","DOI":"10.1007\/s00500-020-05191-1","article-title":"ECG signal processing and KNN classifier-based abnormality detection by VH-doctor for remote cardiac healthcare monitoring","volume":"24","author":"Venkataramanaiah","year":"2020","journal-title":"Soft Comput."},{"key":"ref_11","unstructured":"Karthickraja, R., Kumar, R., Kirubakaran, S., Marcilin, L.J.A., and Manikandan, R. (2020). COVID-19 prediction and symptom analysis using wearable sensors and IoT. Int. J. Pervasive Comput. Commun., ahead-of-printing."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"967","DOI":"10.5005\/jp-journals-10071-23547","article-title":"Mechanisms of hypoxia in COVID-19 patients: A pathophysiologic reflection","volume":"24","author":"Nitsure","year":"2020","journal-title":"Indian J. Crit. Care Med."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"115","DOI":"10.5005\/jp-journals-10071-23740","article-title":"COVID-19 ARDS: Can systemic oxygenation utilization guide oxygen therapy?","volume":"25","author":"Srinivasan","year":"2021","journal-title":"Indian J. Crit. Care Med."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Ullah, F., Haq, H.U., Khan, J., Safeer, A.A., Asif, U., and Lee, S. (2021). Wearable iots and geo-fencing based framework for COVID-19 remote patient health monitoring and quarantine management to control the pandemic. Electronics, 10.","DOI":"10.3390\/electronics10162035"},{"key":"ref_15","unstructured":"(2021, October 19). Coronavirus (COVID-19) in the Slovak Republic in Numbers, Available online: https:\/\/korona.gov.sk\/koronavirus-na-slovensku-v-cislach\/."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1023","DOI":"10.1111\/jth.14810","article-title":"ISTH interim guidance on recognition and management of coagulopathy in COVID-19","volume":"18","author":"Thachil","year":"2020","journal-title":"J. Thromb. Haemost."},{"key":"ref_17","first-page":"1837","article-title":"Turbulent Gas Clouds and Respiratory Pathogen Emissions: Potential Implications for Reducing Transmission of COVID-19","volume":"323","author":"Bourouiba","year":"2020","journal-title":"JAMA-J. Am. Med. Assoc."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"175","DOI":"10.1038\/d41586-020-00974-w","article-title":"Is the coronavirus airborne? Experts can\u2019t agree","volume":"580","author":"Lewis","year":"2020","journal-title":"Nature"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"18","DOI":"10.2807\/1560-7917.ES.2020.25.29.2001269","article-title":"Authors\u2019 response: Estimating the generation interval for COVID-19 based on symptom onset data","volume":"25","author":"Kremer","year":"2020","journal-title":"Eurosurveillance"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"2800","DOI":"10.1038\/s41467-020-16670-2","article-title":"Detection of air and surface contamination by SARS-CoV-2 in hospital rooms of infected patients","volume":"11","author":"Chia","year":"2020","journal-title":"Nat. Commun."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"12732","DOI":"10.1038\/s41598-020-69286-3","article-title":"Aerosol and surface contamination of SARS-CoV-2 observed in quarantine and isolation care","volume":"10","author":"Santarpia","year":"2020","journal-title":"Sci. Rep."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1564","DOI":"10.1056\/NEJMc2004973","article-title":"Aerosol and Surface Stability of SARS-CoV-2 as Compared with SARS-CoV-1","volume":"382","author":"Bushmaker","year":"2020","journal-title":"N. Engl. J. Med."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1973","DOI":"10.1016\/S0140-6736(20)31142-9","article-title":"Physical distancing, face masks, and eye protection to prevent person-to-person transmission of SARS-CoV-2 and COVID-19: A systematic review and meta-analysis","volume":"395","author":"Chu","year":"2020","journal-title":"Lancet"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"102390","DOI":"10.1016\/j.scs.2020.102390","article-title":"The efficacy of social distance and ventilation effectiveness in preventing COVID-19 transmission","volume":"62","author":"Sun","year":"2020","journal-title":"Sustain. Cities Soc."},{"key":"ref_25","first-page":"39","article-title":"Air disinfection procedures in the dental office during the COVID-19 pandemic","volume":"72","author":"Dubiel","year":"2021","journal-title":"Med. Pr."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"O\u2019Dowd, K., Nair, K.M., Forouzandeh, P., Mathew, S., Grant, J., Moran, R., Bartlett, J., Bird, J., and Pillai, S.C. (2020). Face Masks and Respirators in the Fight Against the COVID-19 Pandemic: A Review of Current Materials, Advances and Future Perspectives. Materials, 13.","DOI":"10.3390\/ma13153363"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"113599","DOI":"10.1016\/j.ijheh.2020.113599","article-title":"Environmental contamination of SARS-CoV-2 on surfaces, air-conditioner and ventilation systems","volume":"230","author":"Mouchtouri","year":"2020","journal-title":"Int. J. Hyg. Environ. Health"},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Bueckert, M., Gupta, R., Gupta, A., Garg, M., and Mazumder, A. (2021). Correction: Bueckert et al. Infectivity of SARS-CoV-2 and Other Coronaviruses on Dry Surfaces: Potential for Indirect Transmission. Materials 2020, 13, 5211. Materials, 14.","DOI":"10.3390\/ma14112816"},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Chirico, F., Sacco, A., Bragazzi, N.L., and Magnavita, N. (2020). Can air-conditioning systems contribute to the spread of SARS\/MERS\/COVID-19 infection? Insights from a rapid review of the literature. Int. J. Environ. Res. Public Health, 17.","DOI":"10.3390\/ijerph17176052"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"731","DOI":"10.1111\/php.13293","article-title":"Estimated Inactivation of Coronaviruses by Solar Radiation With Special Reference to COVID-19","volume":"96","author":"Sagripanti","year":"2020","journal-title":"Photochem. Photobiol."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"2857","DOI":"10.1002\/jmv.26154","article-title":"Hyperpyrexia in patients with COVID-19","volume":"92","author":"Suwanwongse","year":"2020","journal-title":"J. Med. Virol."},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Schneider, A., Kirsten, H., Lordick, F., Lordick, F., Lubbert, C., and Braun, A. (2021). Von COVID-19 in outpatients-Is fever a useful indicator for SARS-CoV-2 infection?. PLoS ONE, 16.","DOI":"10.1371\/journal.pone.0251623"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"484","DOI":"10.1177\/0885066620979622","article-title":"Fever in the ICU: A Predictor of Mortality in Mechanically Ventilated COVID-19 Patients","volume":"36","author":"Choron","year":"2021","journal-title":"J. Intensive Care Med."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"706","DOI":"10.1093\/qjmed\/hcab023","article-title":"Fever as a predictor of adverse outcomes in COVID-19","volume":"114","author":"Chew","year":"2021","journal-title":"QJM An Int. J. Med."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"1249","DOI":"10.3389\/fpubh.2021.712190","article-title":"Early Fever Is Associated With Clinical Outcomes in Patients with Coronavirus Disease","volume":"9","author":"Ding","year":"2021","journal-title":"Front. Public Health"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"111255","DOI":"10.1016\/j.mad.2020.111255","article-title":"Risk factors for predicting mortality in elderly patients with COVID-19: A review of clinical data in China","volume":"188","author":"Leung","year":"2020","journal-title":"Mech. Ageing Dev."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"4","DOI":"10.1186\/s13054-020-03186-w","article-title":"Response to \u201cbody temperature correlates with mortality in COVID-19 patients\u201d","volume":"24","author":"Drewry","year":"2020","journal-title":"Crit. Care"},{"key":"ref_38","doi-asserted-by":"crossref","unstructured":"Ghassemi, P., Joshua Pfefer, T., Casamento, J.P., Simpson, R., and Wang, Q. (2018). Best practices for standardized performance testing of infrared thermographs intended for fever screening. PLoS ONE, 13.","DOI":"10.1371\/journal.pone.0203302"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"19115","DOI":"10.2807\/ese.14.06.19115-en","article-title":"International travels and fever screening during epidemics: A literature review on the effectiveness and potential use of non-contact infrared thermometers","volume":"14","author":"Bitar","year":"2009","journal-title":"Euro Surveill."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"638","DOI":"10.1097\/JOM.0000000000002245","article-title":"Worksite Temperature Screening for COVID-19","volume":"63","author":"Stave","year":"2021","journal-title":"J. Occup. Environ. Med."},{"key":"ref_41","doi-asserted-by":"crossref","unstructured":"Mekjavic, I.B., and Tipton, M.J. (2020). Myths and methodologies: Degrees of freedom\u2013limitations of infrared thermographic screening for COVID-19 and other infections. Exp. Physiol., 1\u201310.","DOI":"10.1113\/EP089260"},{"key":"ref_42","first-page":"1","article-title":"Limitations of Temporal (Forehead) Temperature Readings","volume":"18","author":"Fernando","year":"2020","journal-title":"PENSAR EN MOVIMIENTO Rev. Cienc. Ejerc. Salud"},{"key":"ref_43","doi-asserted-by":"crossref","unstructured":"Dell\u2019isola, G.B., Cosentini, E., Canale, L., Ficco, G., and Dell\u2019isola, M. (2021). Noncontact body temperature measurement: Uncertainty evaluation and screening decision rule to prevent the spread of COVID-19. Sensors, 21.","DOI":"10.3390\/s21020346"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"768","DOI":"10.7326\/M15-1150","article-title":"Accuracy of Peripheral Thermometers for Estimating Temperature","volume":"163","author":"Niven","year":"2015","journal-title":"Ann. Intern. Med."},{"key":"ref_45","doi-asserted-by":"crossref","unstructured":"Nuertey, B.D., Ekremet, K., Haidallah, A.R., Mumuni, K., Addai, J., Attibu, R.I.E., Damah, M.C., Duorinaa, E., Seidu, A.S., and Adongo, V.C. (2021). Performance of COVID-19 associated symptoms and temperature checking as a screening tool for SARS-CoV-2 infection. PLoS ONE, 16.","DOI":"10.1371\/journal.pone.0257450"},{"key":"ref_46","unstructured":"(2021, November 05). Resideo, LifeStream TM Remote Health Monitoring Solution. Available online: https:\/\/lifecare.resideo.com\/."},{"key":"ref_47","unstructured":"Boaz, A., and Al, E. (2021, November 05). Remote Health Monitoring System. Available online: https:\/\/patents.google.com\/patent\/US6171237\/."},{"key":"ref_48","first-page":"373","article-title":"Patient monitoring using personal area networks of wireless intelligent sensors","volume":"37","author":"Jovanov","year":"2001","journal-title":"Biomed. Sci. Instrum."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"431","DOI":"10.1007\/s11277-010-0078-5","article-title":"Remote Patient Monitoring Within a Future 5G Infrastructure","volume":"57","author":"Oleshchuk","year":"2011","journal-title":"Wirel. Pers. Commun."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"57","DOI":"10.1007\/s12652-017-0598-x","article-title":"Remote patient monitoring: A comprehensive study","volume":"10","author":"Malasinghe","year":"2019","journal-title":"J. Ambient Intell. Humaniz. Comput."},{"key":"ref_51","unstructured":"Strempel, P. (2021, November 05). EIT Digital Pilots COVID-19 Tracing with Physical Tokens in Stadiums, Hospitals, Schools, and Concert Halls. Available online: https:\/\/www.eitdigital.eu\/newsroom\/news\/archive\/article\/eit-digital-pilots-covid-19-tracing-with-physical-tokens-in-stadiums-hospitals-schools-and-concert-halls\/."},{"key":"ref_52","first-page":"108","article-title":"Security and Privacy Issues Associated with Coronavirus Diagnosis and Prognosis","volume":"Volume 372","author":"Paiva","year":"2021","journal-title":"Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering"},{"key":"ref_53","doi-asserted-by":"crossref","unstructured":"Yousif, M., Hewage, C., and Nawaf, L. (2021). IOT technologies during and beyond COVID-19: A comprehensive review. Future Internet, 13.","DOI":"10.3390\/fi13050105"},{"key":"ref_54","unstructured":"Boss, G.J., Finn, P.G., Rick, A., Hamilton, I., and Kozloski, J.R. (2018). Tracking Pathogen Exposure 2018. (2018052970A1), U.S. Patent."},{"key":"ref_55","unstructured":"Akutagava, C.E., and Myslinski, L.J. (2020). Method of and Device fore Implementing Contagious Illness Analysis and Tracking 2020. (2020279339A1), U.S. Patent."},{"key":"ref_56","unstructured":"Wong, C.M. (2007). System and Method for Creating a Proximity Map of Plurality of Living Beings and Objects 2007. (2007106775A1), U.S. Patent."},{"key":"ref_57","unstructured":"(2021, November 05). Wairehealth C-Detect: A Wearable Vital Signs Monitor for Everyone. Available online: https:\/\/www.c19detect.com\/."},{"key":"ref_58","unstructured":"(2021, November 05). EIT Digital Crowdband. Available online: https:\/\/en.crowdband.life\/."},{"key":"ref_59","unstructured":"(2020). Nachverfolgung von Kontakten Innerhalb Einer Gruppe von Personen 2020. (202020102994U1), DE Patent."},{"key":"ref_60","unstructured":"(2021, November 05). Free COVID 19 Contact Tracing for Restaurateurs. Available online: https:\/\/www.restauranthub.co.nz\/for-restaurants\/covid-19-contact-tracing\/."},{"key":"ref_61","unstructured":"(2021, November 05). Digital Check-in Solution for Restaurants. Available online: https:\/\/www.resmio.com\/en\/reservations\/guest-check-in-qr-code\/."},{"key":"ref_62","unstructured":"(2010). Cypress Semiconductor, Comparison of 2.4-GHz Proprietary RF and Bluetooth 4.0 for HID Applications. DigiKey Techzone Magazine, Digi-Key Corporation."},{"key":"ref_63","unstructured":"Texas Instrument (2021). Wireless Connectivity Technology Selection Guide, Texas Instruments."},{"key":"ref_64","doi-asserted-by":"crossref","unstructured":"Kumar, P., Reddy, L., and Varma, S. (2009, January 15\u201319). Distance measurement and error estimation scheme for RSSI based localization in Wireless Sensor Networks. Proceedings of the 2009 Fifth International Conference on Wireless Communication and Sensor Networks (WCSN), Allahabad, India.","DOI":"10.1109\/WCSN.2009.5434802"},{"key":"ref_65","unstructured":"Laird (2018). User Guide: BL654 smartBASIC Extensions, Laird."},{"key":"ref_66","doi-asserted-by":"crossref","unstructured":"Vavrinsky, E., Subjak, J., Donoval, M., Wagner, A., Zavodnik, T., and Svobodova, H. (2020). Application of Modern Multi-Sensor Holter in Diagnosis and Treatment. Sensors, 20.","DOI":"10.3390\/s20092663"},{"key":"ref_67","doi-asserted-by":"crossref","unstructured":"Vavrinsky, E., Stopjakova, V., Kopani, M., and Kosnacova, H. (2021). The Concept of Advanced Multi-Sensor Monitoring of Human Stress. Sensors, 21.","DOI":"10.3390\/s21103499"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/2\/526\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,13]],"date-time":"2025-10-13T14:01:58Z","timestamp":1760364118000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/2\/526"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,1,11]]},"references-count":67,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2022,1]]}},"alternative-id":["s22020526"],"URL":"https:\/\/doi.org\/10.3390\/s22020526","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,1,11]]}}}