• Journal of the Korea Safety Management & Science
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• v.11 no.3
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• pp.87-94
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• 2009

Today's driver information system often features a rotary control type as a main controller for menu navigation. Population stereotype should be clearly understood in designing those systems to minimize the misunderstanding by the operator. This paper investigates stereotypes for rotary controlled menu interfaces and influences of contributing principles. A human factors experiment was conducted using various configurations of control-display layouts, cursor shapes/positions, and movement directions. The results showed that the control should be on the left of the display, with a rightward icon on the right side of the cursor, in order to match the stereotype. Regression analysis indicated that Warrick's principle was the most influential principle, followed by Icon shape, Icon position, Clockwise away, and Clockwise up principles. This study provides valuable information to designers of menu-based systems such as driver information systems and main control rooms that uses rotary controls.

• Archives of design research
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• v.17 no.3
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• pp.441-448
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• 2004

Mobile devices such as mobile phones or PDAs are considered as main interlace tools in ubiquitous computing environment. For searching information in mobile device, it should be possible for user to input some text as well as to control cursor for navigation. So, we should find efficient interlace method for text input in limited dimension of mobile devices. This study intends to suggest a new approach to mobile interaction using camera based virtual keyboard for text input in mobile devices. We developed a camera based virtual keyboard prototype using a PC camera and a small size LCD display. User can move the prototype in the air to control the cursor over keyboard layout in screen and input text by pressing a button. The new interaction method in this study is evaluated as competitive compared to mobile phone keypad in left input efficiency. And the new method can be operated by one hand and make it possible to design smaller device by eliminating keyboard part. The new interaction method can be applied to text input method for mobile devices requiring especially small dimension. And this method can be modified to selection and navigation method for wireless internet contents on small screen devices.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04b
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• pp.157-159
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• 2001

교환기 시스템(switching system)과 같은 통신 시스템 환경에서는 매우 제한적인 시간제약하에서 명시된 이벤트들이 반드시 완료되어야 한다. 따라서, 시스템내에 유지되는 응용데이터에 대해, 매우 빠르고 균일한 접근 시간을 제공하여야 한다. 또한, 최근들어 통신 운용 환경과 교환기 소프트웨어의 복잡성의 증가로 다중테이블 죠인과 객체지향 특성과 같은 고급 기능을 포함한 보다 향상된 데이터 모델링이 요구되고 있다. 이를 위해, 본 논문에서는 1) 통신 응용 환경을 보다 쉽게 모델링하도록 다양한 설계 모델링 개념을 제공하고, 2) 죠인과 같은 연산을 위해 추가의 메모리공간이나 시간을 사용하지 않고, 객체식별자의 항해를 통해 직접 결과를 추출하는 방법에 대해 설명한다.

• The KIPS Transactions:PartC
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• v.9C no.1
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• pp.31-38
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• 2002

Communication systems, such as Switching System, are operated in the restricted conditions that the suggested events must finish in the time-constraints. Therefore, the data in the systems requires not only rapid access time, but also completion in the restricted time. Many existing data systems have been developed and used in the communication environments. But, the system construct a structural scheme and provide users with basic data services only. In recent, as the complexity of data in the communication area is rapidly increasing, it requires the data system which can represent the unstructured dataset and complete the data access in this dataset on the restricted condition. In this paper, we propose the data model which is suitable to the unstructured multi-dataset environment. The data model supports the rapid data access for unstructured dataset and enables users to easily retrieve data needed at the execution. In addition to, we define the several algorithms to clarify the structure of our model.