This paper establishes the equality of the observation spaces defined by means of piecewise constant controls with those defined in terms of differentiable controls. This research was supported in part by US Air Force Grant AFOSR-88-0235. keywords: Observation space, shuffle product, input-output system, generating series.

This chapter focuses on the World Wide Web (Web) as a provider of shared information landscapes. It reviews our work to design 3D spaces for information navigation and social interaction, and suggests an approach to such design based on an experiential theory of meaning. The increasing use of virtual 3D space in information environments is noted, and Personal Spaces are contrasted with Public P...

We develop the general theory of topometric spaces, i.e., topological spaces equipped with a well-behaved lower semi-continuous metric function. Spaces of global and local types in continuous logic are the motivating examples for the study of such spaces. In particular, we develop a theory of Cantor-Bendixson analysis of topometric spaces, which can serve as a basis for the study of local stabi...

TV White Spaces have recently been proposed as an alternative to alleviate the spectrum crunch, characterised by the need to reallocate frequency bands to accommodate the ever-growing demand for wireless communications. In this paper, we discuss the motivations and challenges for collecting spectrum measurements in developing regions and discuss a scalable system for communities to gather and p...

University campuses are busy places for wireless client traffic coming from Wi-Fi connections and other wireless devices that contend for the 2.4 GHz frequencies space that most campus Wi-Fi networks use currently. This is making the 2.4 GHz frequency unsuitable for WiFi connection due to too much interference from other devices as well as from Wi-Fi connections themselves. TV white space could...

Critical Discourse Analysis (CDA) is a multidisciplinary holistic, consisting of a number of different theoretical approaches to the microlevel analysis of text and talk that has to do with the social and/or political. These various methodological approaches are unified, however, by a macrolevel social critique which maintains that social inequality may be enacted, sustained and legitimised thr...

Urban spaces are considered as important elements in the urban structure. These spaces are scenes in which the general activities of urban life take place and they are able to provide an opportunity for the development of innovations for the people and to act as a recreational and constructive environment in an urban collection to provide a setting while every human being would need to perceive...

We introduce process spaces as a new abstraction for the definition of a process metaphore over various (heterogeneous) information systems in an enterprise, which are not necessarily process-aware, and propose the design and development of process spaces management systems (PSMSs), which provide support for the discovery, analysis, monitoring, querying, and exploration of process spaces. We al...