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| SHARK is an advanced, efficient, pen-based text input method for mobile devices that is easy to use. It combines novel pattern recognition technology with a stylus keyboard. A new user may trace letters on the keyboard to enter a word rather than typing each letter individually. The stylus keyboard in SHARK works as a "training wheel" towards sokgraph gesturing. It is also a mnemonic device that helps the user remember the sokgraphs. Special algorithms, feedback mechanisms, and interface techniques are developed to support users' gradual transition from visually-guided tracing on keyboard to recall-driven gesturing. A video demo is available.
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