Mobile computers, such as cell phones and Personal Digital Assistants (PDAs), have dramatically increased in sophistication. At the same time, the desire of consumers for portability limits battery size. As a result, many researchers have targeted hardware and software energy optimization. However, most of these techniques focus on compute-intensive applications, rather than interactive applications, which are dominant in mobile computers. These systems frequently use Graphical User Interfaces (GUIs) to handle human-computer interaction. This paper is the first to explore how GUIs can be designed to improve system energy efficiency.
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