Additional input controls such as fingerprint scanners, physical buttons, and Back-of-Device
(BoD) touch panels improve the input capabilities on smartphones. While previous work …

Featured Application The grip posture information identified from this study can provide
fundamental knowledge of how users grasp a smartphone and be of use for the design of …

Mobile devices such as smartphones and tablets have replaced desktop computers for a
wide range of everyday tasks. Virtually every smartphone incorporates a touchscreen which …

In the era of network service, the user authentication becomes more indispensable but also
vulnerable. Traditional user verification approaches such as PIN or pattern lock suffer from …

Smartphone hard key locations need to be ergonomically determined to improve grip
stability and operational efficiency for users' convenience. The present study proposed an …

As phone touch screen becomes larger and larger, for single hand holding posture, the user
interaction can be extremely hard if icon do not be placed into proper touch area. So it is …

Grip posture needs to be considered to ergonomic smartphone interface design for better
usability in terms of controllability, user performance, and stability. The present study is …

Objective: The present study is intended to objectively classify grip postures for smartphone
when user conduct tasks with hard keys and a touchscreen. Background: Grip postures …

a motion is produced from the interaction of subsystems within individuals, tasks, and the
environment. According to the theory, physical/anthropometrical properties of the human can …

This dissertation aimed to develop a thumb performance model that addresses grip span for
one-handed interaction on mobile devices. Toward that end, it achieved several objectives …