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Internet Protocol TV 환경에서 효율적인 웹 탐색기법의 사용성에 대한 비교 연구
홍지영(Ji-Young Hong),채행석(Haeng-Suk Chae),조운정(Wonjung Cho),정대현(Dae-Hyun Jung),김종완(Joong-Wan Kim),김성은(Seung-Eun Kim),이혜정(Hyea-Jung Lee),한광희(Kwang-Hee Han) 대한인간공학회 2008 大韓人間工學會誌 Vol.27 No.4
Recently, Internet Protocol TV technology has a latent power for searching information by using internet-connected interactive TV media. It is hard to browse and search web site conveniently since the visual and input devices are not sufficient for navigating through the websites. Zoomable user interface is a possible solution that may reduce users' task load and improve their performance. In this paper, we made three types of web browsers as scroll, physical zooming and semantic zooming type. Fifteen participants asked to do searching tasks and their task time, accuracy and subjective responses are recorded. In the result, though scroll type is evaluated more efficient than other types in task time and accuracy since participants are familiar with scroll type interface, semantic zooming type is highly rated in subjective responses such as perceived searching efficiency, satisfaction and joyfulness. This result implied semantic zooming is a possible solution which is improving user experience of searching websites using Internet Protocol TV.
웨어러블 컴퓨터 환경에서 포인팅 인터페이스의 동적 이득 방법의 효율성 평가
홍지영(Ji?Young Hong),채행석(Haeng?Suk Chae),한광희(Kwang?Hee Han) 대한인간공학회 2007 大韓人間工學會誌 Vol.26 No.4
Input devices of wearable computer are difficult to use, so a lot of alternative pointing devices have been considered in recent years. In order to resolve this problem, this paper proposed a dynamic gain control method which is able to improve the performance of wearable pointing device and showed an experimental result comparing this method with conventional method. Also the effects of methods were compared in terms of device (wearable and desktop). The result of calculating throughputs(index of performance) by Fitts' law showed that the pointing performance in dynamic gain condition was improved 1.4 times more than normal gain.