Multi-objective optimization of mobile phone keymaps for typing messages using a word list

Multi-objective optimization of mobile phone keymaps for typing messages using a word list

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Article ID: iaor20097
Country: Netherlands
Volume: 179
Issue: 3
Start Page Number: 838
End Page Number: 846
Publication Date: Jun 2007
Journal: European Journal of Operational Research
Authors:
Keywords: programming: multiple criteria, design
Abstract:

Most mobile phones today offer the option of using a word list to ease the typing of short messages. When a word list is used, a word is input as a sequence of digits by pressing the key corresponding to each letter once. The word list is used to look up the word(s) that correspond to this sequence of digits. This paper describes how a mobile phone keyboard layout can be obtained that is better suited for typing such messages. Two objectives are considered: the total cost of typing, and the total cost of word clashes that occur when a certain digit sequence corresponds to two or more words in the word list. A multi-start descent algorithm is developed to obtain a Pareto set of solutions.

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