Articles by Do Hyong Koh

Do Hyong Koh is a graduate student of Computer Science Department at Texas State University-San Marcos.

Usability Evaluation of Touch-less Mouse, Based on Infrared Proximity Sensing

Abstract In this work, we examined a touchless mouse, which is a Human-Machine Interface (HMI) device for non-contact gesture inputs to a computer system. The touchless or T-less mouse is used by moving a finger without touching any device or surface. We evaluated it according to the guidelines and testing procedures for evaluating computer pointing […] [Read More]

Usability Evaluation of Randomized Keypad

Abstract In this work, the usability of a randomized numeric keypad was examined and compared to the usability of a conventional numeric keypad. The comparison used completion time measurements and the error rate of short (4 digit) and long (8-digit) PINs to contrast efficiency and accuracy of the keypads. The results showed that the average […] [Read More]