Selected Publications

Which Components of a Smartphone Walking App Help Users to Reach Personalized Step Goals? Results From an Optimization Trial.
Published
,
2020
Jan-Niklas Kramer, Florian Künzler, Varun Mishra, Shawna N. Smith, David Kotz, Urte Scholz, Elgar Fleisch, and Tobias Kowatsch
To evaluate the effects of incentives, weekly planning, and daily self-monitoring prompts that were used as intervention components as part of the Ally app.
Measuring children’s eating behavior with a wearable device
Published
,
2020
Shengjie Bi, Yiyang Lu, Nicole Tobias, Ella Ryan, Travis Masterson, Sougata Sen, Ryan Halter, Jacob Sorber, Diane Gilbert-Diamond, and David Kotz
In this paper, we present the feasibility of adapting the Auracle, an existing research-grade earpiece designed to automatically and unobtrusively recognize eating behavior in adults, for measuring children’s eating behavior
Auracle: Detecting Eating Episodes with an Ear-Mounted Sensor
Published
,
2018
Shengjie Bi, Tao Wang, Nicole Tobias, Josephine Nordrum, Shang Wang, George Halvorsen, Sougata Sen, Ronald Peterson, Kofi Odame, Kelly Caine, Ryan Halter, Jacob Sorber, David Kotz
In this paper, we propose Auracle, a wearable earpiece that can automatically recognize eating behavior. More specifically, in free-living conditions, we can recognize when and for how long a person is eating.
Continuous Detection of Physiological Stress with Commodity Hardware
Published
,
2020
Varun Mishra, Gunnar Pope, Sarah Lord, Stephanie Lewia, Byron Lowens, Kelly Caine, Sougata Sen, Ryan Halter, and David Kotz
Use cheap, nonclinical sensors to capture physiological signals and make inferences about the wearer’s stress level based on that data.
Exploring the State-of-Receptivity for mHealth Interventions
Published
,
2019
Florian Kunzler, Varun Mishra, Jan-Niklas Kramer, Davis Kotz, Elgar Fleisch, Tobias Kowatsch
In this work, we explore the factors affecting users’ receptivity towards Just-In-Time Adaptive Interventions (JITAI).
Investigating Intervention Components and Exploring States of Receptivity for a Smartphone App to Promote Physical Activity: Protocol of a Microrandomized Trial
Published
,
2019
Jan-Niklas Kramer, Florian Künzler, Varun Mishra, Bastien Presset, David Kotz, Shawna Smith, Urte Scholz, and Tobias Kowatsch.
The primary objective of this study is to quantify main effects, interactions, and moderators of 3 intervention components of a smartphone-based intervention for physical activity.
The Case for a Commodity Hardware Solution for Stress Detection
Published
,
2018
Varun Mishra, Gunnar Pope, Sarah Lord, Stephanie Lewia, Byron Lowens, Kelly Caine, Sougata Sen, Ryan Halter, and David Kotz
In this paper, we explore the viability of commercially available off-the-shelf sensors for stress monitoring.
Investigating Contextual Cues As Indicators for EMA Delivery
Published
,
2017
Varun Mishra, Byron Lowens, Sarah Lord, Kelly Caine, and David Kotz
In this work, we attempt to determine whether the contextual information of a participant can be used to predict whether the participant will respond to a particular EMA trigger.
Toward a Wearable Sensor for Eating Detection
Published
,
2017
Shengie Bi, Tao Wang, Ellen Davenport, Ronald Peterson, Ryan Halter, Jacob Sorber, David Kotz
In this paper, we evaluate sensors and algorithms designed to detect eating activities, more specifically, when people eat.
Poster: Auracle --- A Wearable Device for Detecting and Monitoring Eating Behavior
Published
,
2017
Shengjie Bi, Ellen Davenport, Jun Gong, Ronald Peterson, Kevin Storer, Tao Wang, Kelly Caine, Ryan Halter, David Kotz, Kofi Odame, Jacob Sorber, and Xing-Dong Yang
The Auracle aims to be a wearable earpiece that detects eating behavior.

My AH Lab Projects