• Journal of Computational Design and Engineering
• /
• v.1 no.1
• /
• pp.67-77
• /
• 2014

Most engineering software tools use typical menu-based user interfaces, and they may not be suitable for learning tools because the solution processes are hidden and students can only see the results. An educational tool for simple beam analyses is developed using a pen-based user interface with a computer so students can write and sketch by hand. The geometry of beam sections is sketched, and a shape matching technique is used to recognize the sketch. Various beam loads are added by sketching gestures or writing singularity functions. Students sketch the distributions of the loadings by sketching the graphs, and they are automatically checked and the system provides aids in grading the graphs. Students receive interactive graphical feedback for better learning experiences while they are working on solving the problems.

• Archives of design research
• /
• v.17 no.4
• /
• pp.61-68
• /
• 2004

A great variety of handheld device are coming onto the market. Some have advanced features compacted into very small sized hardware. In order to maximize the capability of these devices, we need to understand the characteristics of different input methods and utilize them in a sufficient way. Our study aims to understand characteristics of each device, so that we can design user interfaces more effectively. Two experiments were conducted to compare target pointing performance with a pen and with a hardware key on small displays. In experiment 1, we examined participants' performance of target pointing with both input methods at different target sizes. It was found that pen operation is more erroneous than key based operation when target size is smaller than 5mm, but at a target size of 5mm, the error rate decreased to the same level as for key input. In experiment 2, we examined the effect of the number of targets. The results showed, with a target size of 5mm, the pen could point to targets quicker than with key input, when the distance to the target exeeds a path length of 3 steps.

• 한국HCI학회:학술대회논문집
• /
• 2009.02a
• /
• pp.351-355
• /
• 2009

When teaching mathematics, one of the most effective ways of analyzing the weakness of student is to look over the process of problem solving. Based on this observation, we propose a Tablet PC based feedback system for effective mathematics education. The effectiveness of our system is demonstrated with usability tests.

• Journal of Korea Multimedia Society
• /
• v.13 no.8
• /
• pp.1235-1244
• /
• 2010

Most emerging smart phones support capacitive touch sensors. It renders existing gesture-based interfaces not suitable since they were developed for the resistive touch sensors and pen-based input. Unlike the flick gestures from the existing gesture interfaces, the finger flick gesture used in this paper reduces the workload about half by selecting the target and the command to perform on the target at a single touch input. With the combination with multi-touch interface, it supports various menu commands without having to learn complex gestures, and is suitable for the touch-based devices hence it minimizes input error. This research designs and implements the multi-touch and flick interface to provide an effective file management system on the smart phones with capacitive touch input. The evaluation proves that the suggested interface is superior to the existing methods on the capacitive touch input devices.