Kyle Koh

Prevention of Unintentional Input While Using Wrist Rotation for Device Configuration

We describe the design of the safeguard interface that helps users avoid unintentional input while using wrist rotation. When configuring the parameters of various devices, our interface helps reduce the chance of making accidental changes by delaying the result of input and allowing the users to make deliberate attempt to change the parameters to their desired value. We evaluated our methods with a set of user experience and found that our methods were more preferred when the end-results of configurational changes of the devices become more critical and can cause irreversible damage.

PhoneCog: a device authentication method on interactive tabletops using color sequence pattern recognition

Tabletop displays often serve as workbenches by allowing users to interact with them using touch capability. This work presents PhoneCog, a device authentication method on interactive tabletops with minimalistic hardware settings by utilizing a color sequence pattern recognition technique for device identification. Users may place their smartphones on a surface, which authenticate and authorize the devices to access various services such as sharing images, and downloading apps. The method is built only with the tabletop displays and does not require any additional hardware such as a depth-camera. We also present an in-field case study where users utilized the device to share various contents among each other in various regions in China where the fast network connection is not readily available.

Quantitative evaluation of media space configuration in a task-oriented remote conference system

While remote conference systems have been extensively studied and developed in the past with various user scenarios, many people still rely on simple tools like messengers or video chats that deliver only visual and auditory information of each remote participant as their primary methods of real time remote communication on their computers and tablets. With the simple tools, people still perform variety of tasks. This paper analyzes the tasks performed in remote conference tools running on general purpose PCs or tablets, and categorizes them into different types based on their characteristics. We performed a controlled user experiment to discover behavioral differences observed from each type of the tasks using eye trackers. The study revealed that users showed different behavioral patterns for different task types in both subjective reporting and the eye gaze data. Based on the results, we also provide a general guideline for the screen configuration of a remote conference tool.