Understanding the engagement levels players have with a game is useful proxy for evaluating design and user experience. This particularly important mobile games as an alternative always just easy download away. However, subjective concept usually requires fine-grained highly disruptive interviews or surveys to determine accurately. In this paper, we present EngageMon, first-of-its-kind system that uses combination of sensors from smartphone (touch events), wristband (photoplethysmography...

We present VitaMon, a mobile sensing system that can measure the inter-heartbeat interval (IBI) from facial video captured by commodity smartphone's front camera. The continuous IBI measurement is used to compute heart rate variability (HRV), one of most important markers autonomic nervous (ANS) regulation. underlying idea VitaMon recording human face contains multiple cardiovascular pulse signals with different phase shift. Our on 10 participants shows significant time delay (36.79 ms)...

Gaze tracking is a key building block used in many mobile applications including entertainment, personal productivity, accessibility, medical diagnosis, and visual attention monitoring. In this paper, we present iMon, an appearance-based gaze system that both designed for use on phones has significantly greater accuracy compared to prior state-of-the-art solutions. iMon achieves by comprehensively considering the estimation pipeline then overcoming three different sources of errors. First,...

It is essential to proactively detect mental health problems such as loneliness and depression in the independently-living elderly for timely intervention by caregivers. In this paper, we introduce an unobtrusive sensor-enabled monitoring system that has been deployed 50 government housing flats with independent-living two years. Then, also present our initial findings from 6-month sensor data between August 2015 April 2016 well survey measure subjective well-being indicator. Our study...

This paper aims to develop a system that evaluates the emotional experience of gamers based on physiological changes. A within-subject experiment with 22 participants has been designed investigate effects difficulty level and social playing mode player emotions examine correlation between each emotion We demonstrate feasibility using commodity wearable sensing devices recognize mobile gamer's emotion. Specifically, our performs 3-level excitement classification at an accuracy 77.38% binary...

Can cryptocurrency mining (crypto-mining) be a practical ad-free monetization approach for mobile app developers? We conducted lab experiment and user study with 228 real Android users to investigate different aspects of crypto-mining. In particular, we show that devices have computational resources spare these can utilized crypto-mining minimal impact on the experience. also examined profitability its stability as compared advertising. many cases, profit exceed advertising's. Most...

Recognizing user emotional states while running entertainment applications such as playing game or watching video is very important to understand and improve experience. In this work, we designed a practical system using wearable physiological sensors including skin electrical conductivity photoplethysmography (PPG) recognize popular non-negative emotions that people experience when they watch videos play games on their mobile devices. We demonstrates how our recognizes in two phases: (1)...

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