The Java Context Awareness Framework (JCAF) – A Service Infrastructure and Programming Framework for Context-Aware Applications

Abstract. Context-awareness is a key concept in ubiquitous computing. But to avoid developing dedicated context-awareness sub-systems for specific applica-tion areas there is a need for more generic programming frameworks. Such frame-works can help the programmer to develop and deploy context-aware applications faster. This paper describes the Java Context-Awareness Framework – JCAF, which is a Java-based context-awareness infrastructure and programming API for creating context-aware computer applications. The paper presents the design principles behind JCAF, its runtime architecture, and its programming API. The paper presents some applications of using JCAF in three different applications and discusses lessons learned from using JCAF.

Semantic Context Reasoning Using Ontology Based Models

New mobile computing technologies and the increasing use of\ud portable devices have pushed the development of the so-called context-aware applications. This new class of applications aims at improving human-computer interactions by supporting dynamic adaptations according to context changes. This paper discusses the suitability of using ontologies for modeling context information and presents the design, implementation and applicability of an ontology based context interpreter. The proposed interpreter is responsible for inferring new context information in a context-aware services platform

Physicality and Cooperative Design

CSCW researchers have increasingly come to realize that material work setting and its population of artefacts play a crucial part in coordination of distributed or co-located work. This paper uses the notion of physicality as a basis to understand cooperative work. Using examples from an ongoing fieldwork on cooperative design practices, it provides a conceptual understanding of physicality and shows that material settings and co-worker’s working practices play an important role in understanding physicality of cooperative design

Exploring the design space for situated glyphs to support dynamic work environments

This note offers a reflection on the design space for a situated glyph - a single, adaptive and multivariate graphical unit that provides in-situ task information in demanding work environments. Rather than presenting a concrete solution, our objective is to map out the broad design space to foster further exploration. The analysis of this design space in the context of dynamic work environments covers i) information affinity - the type of information can be presented with situated glyphs, ii) representation density - the medium and fidelity of information presentation, iii) spatial distribution - distribution granularity and placement alternatives for situated glyphs, and finally iv) temporal distribution - the timing of information provision through glyphs. Our analysis has uncovered new problem spaces that are still unexplored and could motivate further work in the field

Activity-Based Support for Mobility and Collaboration in Ubiquitous Computing

Abstract. For unknown reasons, research into ubiquitous computing seems to pay no attention to collaboration among users in such an environment. This paper presents the design philosophy of activity-based computing (abc) and a technical implementation of it in a ubiquitous computing infrastructure, the ABC framework, which takes collaboration in ubiquitous environments as its starting point. The idea of activity-based computing and the aim of the framework is to: (i) support the human activity by managing its collection of work tasks on a computer, (ii) to support mobility by porting activities across heterogeneous computing environments, (iii) to support asynchronous collaboration by allowing several people to participate in an activity, and (iv) to support synchronous, real-time collaboration by enabling ’desktop conferring ’ by sharing the activity across several clients. During a period of two years, our framework have been co-designed and evaluated in cooperation with a range of clinicians in a hospital.

Smartphone based treatment in bipolar disorder

E-mental health technologies are under great development and the use is of these technologies is increasing rapidly.During this symposium, results from a randomized controlled trial investigating the effect of smartphone based electronic self-monitoring on the severity of depressive and manic symptoms will be presented and discussed.Further, we will present and discuss the use of automatically generated objective smartphone data on behavioral activities (e.g. social activities, mobility and physical activity) as electronic biomarkers of illness activity in bipolar disorder.Disclosure of interestThe authors have not supplied their declaration of competing interest.</jats:sec