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Diabetes, obesity, and physical inactivity are common in urban areas in sub-Saharan Africa. This paper reports an investigation of lay knowledge, attitudes, and behaviors relating to diabetes and its main risk factors of urban Cameroonians. We carried out a qualitative study in four urban health districts, one from each of the main ecological areas of(More)
The incorporation of haptic interfaces into collaborative virtual environments is challenging when the users are geographically distributed. Reduction of latency is essential for maintaining realism, causality and the sense of co-presence in collaborative virtual environments during closely-coupled haptic tasks. In this study we consider the effects of(More)
In an effort to present users with an increasing amount of information, many industries including automotive and aerospace are adopting flat panel touch displays as a user interface. These interfaces are becoming popular due to their reconfigurability so that control and display functions can be embedded in multiple layers or menus. However, one of the(More)
Dithering quality of the void and cluster algorithm suffers due to fixed filter width and absence of a well-defined criterion for selecting among equally likely candidates during the computation of the locations of the tightest clusters and largest voids. Various researchers have addressed the issue of fixed filter width by adaptively changing the width(More)
An adaptive error diffusion technique for color ink jet printing has been developed to improve halftone smoothness and quality. The technique makes the output color dot distribution smoothly spread apart each other. This reduces color interference noises. In addition, it increases frequency at light tones to result better visual quality. Threshold values(More)
This paper describes a new error difhsion technique with an ink reduction model to achieve high quality and high resolution ( 600 dpi and above) ink jet printing. Variable-sized error filters are designed in the ink reduction model to prevent ink overflow on media and also to maintain smooth halftone micro structures without worm-like artifacts.(More)
As the internet and other communication channels mature, many industries are looking at these mediums to not only display information but also to perform real time tasks such as remote vehicle control, remote tuning, interactive collaborations, etc. These tasks rely heavily on visual senses and the users ability to process information in a timely manner. As(More)