We present TouchSense, which provides additional touchscreen input vocabulary by distinguishing the areas of users' finger pads contacting the touchscreen. It requires minimal touch input area and minimal movement, making it especially ideal for wearable devices such as smart watches and smart glasses. For example, users of a calculator application on a smart watch could tap normally to enter numbers, and tap with the right side of their fingers to enter the operators (e.g. , -, =). Results from two human-factor studies showed that users could tap a touchscreen with five or more distinct areas of their finger pads. Also, they were able to tap with more distinct areas closer to their fingertips. We developed a TouchSense smart watch prototype using inertial measurement sensors, and developed two example applications: a calculator and a text editor. We also collected user feedback via an explorative study.

Most mobile games are designed for users to only focus on their own screens thus lack of face-to-face interaction even users are sitting together. Prior work shows that the shared information space created by multiple mobile devices can encourage users to communicate to each other naturally. The aim of this work is to provide a fluent view-stitching technique for mobile phone users to establish their information-shared view. We present MagMobile: a new spatial interaction technique that allows users to stitch views by simply putting multiple mobile devices close to each other. We describe the design of spatial-aware sensor module which is low cost and easy to be obtained into phones. We also propose two collaborative games to engage social interactions in the co-located place.