In a 24 x 7 mobile world experiencing a proliferation of handheld devices, battery life can be a limiting factor. In particular, handheld displays consume substantial battery power. One strategy to potentially reduce display battery consumption and support a positive user experience is to adopt emerging display technologies (e.g., OLEDs) that support energy-aware interfaces. The research report...

We present a method for constructing signature schemes for use with mobile handheld devices that mitigates the risk of an attacker forging signatures using key material garnered from a lost handheld. This scheme is forward-secure, meaning that signatures created before a breach are still valid, and server-assisted, meaning that a separate untrusted server must assist the device in signing, ther...

Most Internet technologies are designed for desktop and large computers running on reliable networks with relatively high bandwidth. Hand-held wireless devices, on the other hand, have a more constrained computing environment. They tend to have less memory, less powerful CPUs, different input devices, and smaller displays. The Wireless Application Protocol (or WAP), which is a specification dev...

This paper discusses group decision making from a visual-interactive perspective. The novelty of our approach is that its major focus is on developing a collection of visualinteractive elements for group decision-making. Our research departs from a collection of representative meeting scenarios to identify common decision-making elements and behavior similarities; and to elaborate a collection ...

Mobile computing has attracted a lot of attention from both the industry and academia in recent years. While a number of mobile applications have been developed, there are no established guidelines on the design of mobile device interfaces. This paper presents our initial efforts to provide a set of practical design guidelines for mobile device interfaces.

OBJECTIVE To compare users' speed, number of entry errors and satisfaction in using two current devices for electronic data collection in clinical research: handheld and laptop computers. DESIGN The authors performed a randomized cross-over trial using 160 different paper-based questionnaires and representing altogether 45,440 variables. Four data coders were instructed to record, according t...

In this paper, a new system for classification of online isolated handwritten Arabic characters on a handheld device (Palm Pilot) is introduced. Unlike other languages, Arabic has many characters that cannot be written in one stroke. The first stroke of most of these characters is identical. That led us to design a new Arabic graffiti. A neural network was used for classification. It achieved a...