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Changsung Lim

M.S. student in HCIL (KAIST School of Computing, advisor/Prof. Geehyuk Lee)

contact: cslim at kaist.ac.kr

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안녕하세요, I'm Changsung Lim (임창성).
I'm passionate about discovering natural and more effective ways to interact in VR.
I believe that one day, everyone will have their own VR device, and I'm preparing for that future.
Feel free to reach out.

├─ Research_Interests

VR Interaction (Object Manipulation, Locomotion, ...)

├─ Latest_News

2024
OCT
DualPad Demo at UIST 2024 (Pittsburgh, USA)
SEP
Started my second semester in master's program
MAY
Rejoined HCIL (Human Computer Interaction Lab) at KAIST
APR
Went on a coast-to-coast road trip in USA by myself (from LA to NY)
MAR
Discharged from the military service (Republic of Korea Army)
2022
SEP
Started the military service (Republic of Korea Army)
FEB
Joined HCIL (Human Computer Interaction Lab) at KAIST

├─ Selected_Publications

DualPad: Exploring Non-Dominant Hand Interaction on Dual-Screen Laptop Touchpads (UIST 2024 Demos)

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DOI PDF Video Preview Poster

Changsung Lim, Sangyoon Lee, Geehyuk Lee

Dual-touchscreen laptops present opportunities for providing an expansive touchpad on the lower touchscreen. This expanded touchpad offers space for the engagement of both the dominant and non-dominant hands. In this context, it is necessary to redefine the role of the non-dominant hand. Therefore, we propose DualPad for dual-touchscreen laptops, which provides a long touchpad on the lower touchscreen. The non-dominant hand can utilize this DualPad to execute Touch Shortcut / Modifier, analogous to keyboard shortcuts and modifier keys on single-screen laptops. Moreover, we propose Dual Cursor as an example of bimanual interaction. In the demonstration, participants are expected to utilize the custom presentation program to create the given slide using two distinct methods. First, they employ the default layout of the virtual keyboard and virtual touchpad provided on the dual-touchscreen laptop. Then, they utilize DualPad for comparison.

Thumble: One-Handed 3D Object Manipulation Using a Thimble-Shaped Wearable Device in Virtual Reality (UIST 2022 Posters)

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DOI PDF Video Poster

Changsung Lim, Jina Kim, Myung Jin Kim

*All authors contributed equally to this research (alphabetical order)

Conventional controllers or hand-tracking interactions in VR cause hand fatigue while manipulating 3D objects because repetitive wrist rotation and hand movements are often required. As a solution to this inconvenience, we propose Thumble, a novel wearable input device worn on the thumb for modifying the orientation of 3D objects. Thumble can rotate the 3D objects depending on the orientation of the thumb and using the thumb pad as an input surface on which the index finger rubs to control the direction and degree of rotations. Therefore, it requires minimal motion of the wrist and the arm. Through the informal user study, we collected the subjective feedback of users and found that Thumble has less hand movement than a conventional VR controller.

└─ Interesting_facts_about_me