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The GUIDE system has been developed to provide city visitors with a hand-held context-aware tourist guide. The system has been successfully deployed in a major tourist destination and is currently at the stage where it is publicly available to visitors who wish to explore the city. Reaching this stage has been the culmination of a number of distinct(More)
This article considers the importance of context in mobile systems. It considers a range of context-related issues and focus on location as a key issue for mobile systems. A design framework is described consisting of taxonomies of location, mobility, population, and device awareness. The design framework inorms the construction of a semantic model of space(More)
In this paper, we describe our experiences of developing and evaluating GUIDE, an intelligent electronic tourist guide. The GUIDE system has been built to overcome many of the limitations of the traditional information and navigation tools available to city visitors. For example, group-based tours are inherently inflexible with fixed starting times and(More)
A s mobile devices and location systems such as the Global Positioning System (GPS) and phone-based technologies proliferate, so too does interest in location-based applications. These applications include tourist information systems, buddy services that inform users when a friend is nearby, and location-based advertisements , which marketers send to users(More)
An increasing trend in mobile and pervasive computing is the augmentation of everyday public spaces with local computation - leading to so called smart environments. However, there are no well accepted techniques for supporting spontaneous interaction between mobile users and these smart environments, though a wide range of techniques have been explored(More)
Novel ubiquitous computing applications such as intelligent vehicles, smart buildings, and traffic management require special properties that traditional computing applications do not support, such as context-awareness, massive decentralisation, autonomous behaviour, adaptivity, proactivity, and innate collaboration. This paper presents a new computational(More)
We consider sex differences in human facial morphology in the context of developmental change. We show that at puberty, the height of the upper face, between the lip and the brow, develops differently in males and females, and that these differences are not explicable in terms of sex differences in body size. We find the same dimorphism in the faces of(More)
This discussion paper considers the nature of growth in data traffic across the Internet, as a basis for asking whether and how such growth might slow down or otherwise be limited. Over the last decade, data growth has been dramatic, and forecasts predict a similar ongoing pattern. Since this is associated with increasing electricity consumption, such a(More)
With advances in sensor-based computing and mobile communication, people have started to explore ubiquitous or pervasive computing systems that aim to have computing devices literally available everywhere, making them disappear into the physical environment. Novel ubiquitous computing applications such as intelligent vehicles, smart buildings, and traffic(More)