Personal and ubiquitous computing: special issue on location and context awareness

Mobile computing is been driven by the proliferation of portable devices and wireless communication. Potentially, in the mobile computing scenario, the users can move in different environments and the applications can automatically explore their surroundings. This kind of context-aware application is emerging, but is not yet widely disseminated. Based on perceived context, the application can modify its behavior. This process, in which software modifies itself according to sensed data, is named Adaptation. This constitutes the core of Ubiquitous Computing. The ubiquitous computing scenario brings many new problems such as coping with the limited processing power of mobile devices, frequent disconnections, the migration of code and tasks between heterogeneous devices, and others. Current practical approaches to the ubiquitous computing problem usually rely upon traditional computing paradigms conceived back when distributed applications where not a concern. Holoparadigm (in short Holo) was proposed as a model to support the development of distributed systems. Based on Holo concepts, a new programming language called HoloLanguage (in short, HoloL) was created. In this chapter, we propose the use of Holo for developing and executing ubiquitous applications. We explore the HoloL for ubiquitous programming and propose a full platform to develop and execute Holo programs. The language supports mobility, adaptation, and context awareness. The execution environment is based on a virtual machine that implements the concepts proposed by Holo. The environment supports distribution and strong code mobility.

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Context-Awareness and Mobile Devices

Handbook of Research on User Interface Design and Evaluation for Mobile Technology ◽

10.4018/978-1-59904-871-0.ch013 ◽

2008 ◽

pp. 205-217 ◽

Cited By ~ 18

Author(s):

Anind K. Dey ◽

Jonna Häkkilä

Keyword(s):

Human Computer Interaction ◽

Mobile Computing ◽

Ubiquitous Computing ◽

Mobile Devices ◽

Context Awareness ◽

Design Guidelines ◽

Context Aware ◽

Definition Of ◽

Mobile Context ◽

Computer Interaction

Context-awareness is a maturing area within the field of ubiquitous computing. It is particularly relevant to the growing sub-field of mobile computing as a user’s context changes more rapidly when a user is mobile, and interacts with more devices and people in a greater number of locations. In this chapter, we present a definition of context and context-awareness and describe its importance to human-computer interaction and mobile computing. We describe some of the difficulties in building context-aware applications and the solutions that have arisen to address these. Despite these solutions, users have difficulties in using and adopting mobile context-aware applications. We discuss these difficulties and present a set of eight design guidelines that can aid application designers in producing more usable and useful mobile context-aware applications.

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The Context-Security Nexus in Ubiquitous Computing

Leadership and Personnel Management ◽

10.4018/978-1-4666-9624-2.ch030 ◽

2016 ◽

pp. 660-679

Author(s):

M. Fahim Ferdous Khan ◽

Ken Sakamura

Keyword(s):

Access Control ◽

Ubiquitous Computing ◽

Context Awareness ◽

Contextual Information ◽

Healthcare Services ◽

Context Aware ◽

Context Sensitive ◽

Access Control Models ◽

Spatio Temporal ◽

The Right

Context-awareness is a quintessential feature of ubiquitous computing. Contextual information not only facilitates improved applications, but can also become significant security parameters – which in turn can potentially ensure service delivery not to anyone anytime anywhere, but to the right person at the right time and place. Specially, in determining access control to resources, contextual information can play an important role. Access control models, as studied in traditional computing security, however, have no notion of context-awareness; and the recent works in the nascent field of context-aware access control predominantly focus on spatio-temporal contexts, disregarding a host of other pertinent contexts. In this paper, with a view to exploring the relationship of access control and context-awareness in ubiquitous computing, the authors propose a comprehensive context-aware access control model for ubiquitous healthcare services. They explain the design, implementation and evaluation of the proposed model in detail. They chose healthcare as a representative application domain because healthcare systems pose an array of non-trivial context-sensitive access control requirements, many of which are directly or indirectly applicable to other context-aware ubiquitous computing applications.

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Context-Awareness and Mobile Devices

Mobile Computing ◽

10.4018/978-1-60566-054-7.ch238 ◽

2009 ◽

pp. 3222-3235 ◽

Cited By ~ 1

Author(s):

Anind K. Dey ◽

Jonna Häkkilä

Keyword(s):

Human Computer Interaction ◽

Mobile Computing ◽

Ubiquitous Computing ◽

Mobile Devices ◽

Context Awareness ◽

Design Guidelines ◽

Context Aware ◽

Definition Of ◽

Mobile Context ◽

Computer Interaction

Context-awareness is a maturing area within the field of ubiquitous computing. It is particularly relevant to the growing sub-field of mobile computing as a user’s context changes more rapidly when a user is mobile, and interacts with more devices and people in a greater number of locations. In this chapter, we present a definition of context and context-awareness and describe its importance to human-computer interaction and mobile computing. We describe some of the dif- ficulties in building context-aware applications and the solutions that have arisen to address these. Despite these solutions, users have difficulties in using and adopting mobile context-aware applications. We discuss these difficulties and present a set of eight design guidelines that can aid application designers in producing more usable and useful mobile context-aware applications.

Download Full-text