A s smartphones proliferate through out society, so too does the opportunity to leverage these devices to study, understand, and positively affect human behavior. The growing opportunity to research and influence people’s daily lives has two primary catalysts. First, device manufacturers are quickly developing smartphones with rich capabilities in terms of computational power and sensor availab...

We present a demonstration of a phone-to-phone Sword Fight! game. It utilizes our solution for achieving high speed 3D continuous localization described in the accompanying conference paper [1]. The approach uses acoustic cues based on time-difference of arrival and power level. It assumes at least two microphones and one speaker per phone, which is common on new smartphones. Accelerometers and...

Time manipulation, typically done using gettime() and settime(), happens extensively across all software layers in smartphones, from the kernel, to the framework, to millions of apps. This paper presents the first study of a new class of software bugs on smartphones called sleep-induced time bugs (SITB). SITB happens when the phone is suspended, due to the aggressive sleeping policy adopted in ...

This paper shows the implementation of a KC tracker (high-speed kernelized correlation tracker) on an Android smartphone. The image processing part is implemented with the Android-NDK in C/C++. Some parts of the tracking algorithm, which can be parallelized very well, are partitioned and calculated on the GPU with OpenGL ES and OpenCL. Other parts, such as the Discrete Fourier Transform (DFT), ...

Tracheal sounds have received a lot of attention for estimating ventilation parameters in a non-invasive way. The aim of this work was to examine the feasibility of extracting accurate airflow, and automating the detection of breath-phase onset and respiratory rates all directly from tracheal sounds acquired from an acoustic microphone connected to a smartphone. We employed the Samsung Galaxy S...

In this project we describe research into playful learning experiences featuring smartphones and external sensors. We built and tested a number of games which can be played using environments populated with sensors and/or actuators interfaced wirelessly with smartphones. An overall story interlinking the games was developed based on the need for action to tackle climate change. Trials with teen...