This paper reports the results of a field trial of 130 bespoke devices as well as our methodological approach to the undertaking. Datacatchers are custom-built, location-aware devices that stream messages about the area they are in. Derived from a large number of 'big data' sources, the messages simultaneously draw attention to the socio-political topology of the lived environment and to the nature of big data itself. We used a service design consultancy to deploy the devices, and two teams of documentary filmmakers to capture participants' experiences. Here we discuss the development of this approach and how people responded to the Datacatchers as products, as revealing sociopolitical issues, and as purveyors of big data that might be open to question.

In this project, we investigated how a ludic approach might open new possibilities for environmental HCI by designing three related devices that encourage environmental awareness while eschewing utilitarian or persuasive agendas. In addition, we extended our methodological approach by batch-producing multiple copies of each device and deploying them to 20 households for several months, gathering a range of accounts about how people engaged and used them. The devices, collectively called the 'Indoor Weather Stations', reveal the home's microclimate by highlighting small gusts of wind, the colour of ambient light, and temperature differentials within the home. We found that participants initially tended to relate to the devices in line with two 'orienting narratives' of environmental tools or ludic designs, finding the devices disappointing from either perspective. Most of our participants showed lingering affection for the devices, however, for a variety of reasons. We discuss the implications of this 'sporadic interaction', and the more general lessons from the project, both for environmental HCI and ludic design.

Abstract The integration of wireless sensor networks with different network systems gives rise to many research challenges to ensure security, privacy and trust in the overall architecture. The main contribution of this paper is a generic security, privacy and trust framework providing context‐aware adaptability, flexibility and scalability which allows customisation of wireless sensor networks to a diverse set of application spaces. Suitable protocols and mechanisms are identified, which when combined according to the framework form a complete toolbox solution which fits the architecture of Beyond 3G environments. Performance evaluation results demonstrate the feasibility and estimate the benefits of the security framework for a variety of scenarios. Copyright © 2008 John Wiley & Sons, Ltd.

Threshold devices present information gathered from the home's surroundings to give new views on the domestic situation. We built two prototypes of different threshold devices and studied them in field trials with participant households. The Local Barometer displays online text and images related to the home's locality depending on the local wind conditions to give an impression of the sociocultural surroundings. The Plane Tracker tracks aircraft passing overhead and imagines their flights onscreen to resource an understanding of the home's global links. Our studies indicated that the experiences they provided were compelling, that participants could and did interpret the devices in various ways, that their form designs were appropriate for domestic environments, that using ready-made information contributed to the richness of the experiences, and that situating the information they provided with respect to the home and its locality was important for the ways people engaged with them.

In this paper, we describe RECOUP (Reliable Configuration Update), an efficient protocol for updating the configuration of a Wireless Sensor Network (WSN).

This article describes field trials of 3 electronic furniture prototypes designed to encourage ludic engagement in the home. The Drift Table shows slowly scrolling aerial photography controlled by the weight of the objects on its surface. The History Tablecloth creates slowly growing “halos” around things left on it. The Key Table measures the force with which people put things on it and tilts a picture frame to indicate their mood. The pieces were loaned to different households for periods of 1 to 3 months. Because they were designed for user appropriation, a hypothesis-testing paradigm is inappropriate for evaluating their success. The focus instead was on gathering rich, multilayered accounts of people's experience through ethnographic observations and documentary videos. The results helped assess the particular designs, draw lessons for ludic design more generally, and reflect on field methods for evaluating open-ended designs.

The History Tablecloth is a flexible substrate screen-printed with electroluminescent material forming a grid of lace-like elements. When objects are left on the table, cells beneath them light to form a halo that grows over a period of hours, highlighting the flow of objects in the home. The Tablecloth explores an approach to design that emphasises engaging, open-ended situations over defined utilitarian purposes. Long-term deployment of the History Tablecloth in a volunteer household revealed complex ways that people experienced and interacted with the Tablecloth. Beyond evoking reflection on the flow of objects over a particular table, the Tablecloth served as a ground for interpretative reflection about technology, an asset for social interaction, and an aesthetic object. Even behaviours we saw as system errors were interpreted by the users as interactively rich. Their experience highlights the subtlety of domestic ubiquitous computing, illustrating alternatives to traditional views of technology's domestic role.

Movements of interfaces can be analyzed in terms of whether they are expected, sensed, and desired. Expected movements are those that users naturally perform; sensed are those that can be measured by a computer; and desired movements are those that are required by a given application. We show how a systematic comparison of expected, sensed, and desired movements, especially with regard to how they do not precisely overlap, can reveal potential problems with an interface and also inspire new features. We describe how this approach has been applied to the design of three interfaces: pointing flashlights at walls and posters in order to play sounds; the Augurscope II, a mobile augmented reality interface for outdoors; and the Drift Table, an item of furniture that uses load sensing to control the display of aerial photographs. We propose that this approach can help to build a bridge between the analytic and inspirational approaches to design and can help designers meet the challenges raised by a diversification of sensing technologies and interface forms, increased mobility, and an emerging focus on technologies for everyday life.