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Open AccessArticle

Sinabro: A Smartphone-Integrated Opportunistic Electrocardiogram Monitoring System

Interdisciplinary Program in Bioengineering, Graduate School, Seoul National University, Seoul 08826, Korea
School of Information Systems, Singapore Management University, Singapore 178902, Singapore
School of Computer Science and Engineering, KOREATECH, Cheonan, 31253, Korea
The 7th R&D Institute, Agency for Defense Development, Daejeon, 32024, Korea
Department of Biomedical Engineering, College of Medicine, Seoul National University, Seoul 03080, Korea
Author to whom correspondence should be addressed.
Academic Editor: Ki H. Chon
Sensors 2016, 16(3), 361;
Received: 4 February 2016 / Revised: 2 March 2016 / Accepted: 7 March 2016 / Published: 11 March 2016
(This article belongs to the Special Issue Smartphone-Based Sensors for Non-Invasive Physiological Monitoring)
In our preliminary study, we proposed a smartphone-integrated, unobtrusive electrocardiogram (ECG) monitoring system, Sinabro, which monitors a user’s ECG opportunistically during daily smartphone use without explicit user intervention. The proposed system also monitors ECG-derived features, such as heart rate (HR) and heart rate variability (HRV), to support the pervasive healthcare apps for smartphones based on the user’s high-level contexts, such as stress and affective state levels. In this study, we have extended the Sinabro system by: (1) upgrading the sensor device; (2) improving the feature extraction process; and (3) evaluating extensions of the system. We evaluated these extensions with a good set of algorithm parameters that were suggested based on empirical analyses. The results showed that the system could capture ECG reliably and extract highly accurate ECG-derived features with a reasonable rate of data drop during the user’s daily smartphone use. View Full-Text
Keywords: opportunistic sensing; unobtrusive sensing; smartphone-integrated; phone case-type; ECG; sensor opportunistic sensing; unobtrusive sensing; smartphone-integrated; phone case-type; ECG; sensor
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Kwon, S.; Lee, D.; Kim, J.; Lee, Y.; Kang, S.; Seo, S.; Park, K. Sinabro: A Smartphone-Integrated Opportunistic Electrocardiogram Monitoring System. Sensors 2016, 16, 361.

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