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In addition, 25 criteria for a haptic device design are identified and applied to evaluate the conceptual prototype. The conceptual prototype for haptic interface is established through identifying the problems with previous haptic interface devices and defining functional requirements for the next generation telematics system. To solve this problem, the aim of this study is to develop a conceptual prototype that supports haptic interface, an eye-free technology, with free navigation based on the user's mental model. A user study is also reported.ĭriver safety and workload have become a crucial issue as the telematics system has evolved in a complex manner.
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The paper describes the system along with the related design choices and design rationale. The system also supports the storage and management of personal information so that addresses, music, directions, and other supportive information can be readily created and then accessed anytime and anywhere by the PDA user. This paper describes an interface that has been built on a standard PDA and allows its user to browse the information stored on it through a combination of screen touches coupled with auditory feedback. These possibilities are not currently available for blind users. First, sighted users can rapidly browse and select information they find useful, and second, sighted users can make much useful information portable through the recent proliferation of personal digital assistants (PDAs). This journal article mainly differs from the related proceedings paper through an extended literature review and analyses regarding dictionary size.Īlthough a large amount of research has been conducted on building interfaces for the visually impaired that allows users to read web pages and generate and access information on computers, little development addresses two problems faced by the blind users. Initial empirical results with the system, which is already in operation, indicate that it indeed represents a viable alternative by decreasing effort without increasing the time to operate a computer. In addition to describing the system, we analyze the ambiguous mode and the influence of dictionary size.
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For example, text entry is facilitated with the help of word prediction, and an ambiguous mode with word-level disambiguation allows text entry using the entire Latin alphabet with six keys. The software offers various assistive techniques. As the keypad lies securely in both hands, the system is ideal for someone who has motor problems using a full-size keyboard. We developed a tool based on a modified number pad to empower persons with certain diseases, in particular of neuromuscular origin, to efficiently operate a computer and enter text.
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