scholarly journals Quality of Context: models and applications for context-aware systems in pervasive environments

2014 ◽  
Vol 29 (2) ◽  
pp. 154-170 ◽  
Author(s):  
Atif Manzoor ◽  
Hong-Linh Truong ◽  
Schahram Dustdar
Keyword(s):  
Context Information ◽  
Context Aware ◽  
Actual Problem ◽  
Problem Context ◽  
Pervasive Environments ◽  
Specific Measurement ◽  
Lack Of Information ◽  
Quality Of Context ◽  
Context Models

AbstractLimitations of sensors and the situation of a specific measurement can affect the quality of context information that is implicitly collected in pervasive environments. The lack of information about Quality of Context (QoC) can result in degraded performance of context-aware systems in pervasive environments, without knowing the actual problem. Context-aware systems can take advantage of QoC if context producers also provide QoC metrics along with context information. In this paper, we analyze QoC and present our model for processing QoC metrics. We evaluate QoC metrics considering the capabilities of sensors, circumstances of specific measurement, requirements of context consumer, and the situation of the use of context information. We also illustrate how QoC metrics can facilitate in enhancing the effectiveness and efficiency of different tasks performed by a system to provide context information in pervasive environments.

scholarly journals Study of a Context Quality Model for UbiPri Middleware

2020 ◽  
Author(s):  
Diandre de Paula ◽  
Daniel Saraiva ◽  
Romeiro Natália ◽  
Nuno Garcia ◽  
Valderi Leithardt
Keyword(s):  
Quality Indicators ◽  
Data Privacy ◽  
Context Information ◽  
Adaptation Process ◽  
Context Aware ◽  
Quality Model ◽  
Context Aware Computing ◽  
Quality Of Context ◽  
The Impact

With the growth of ubiquitous computing, context-aware computing-based applications are increasingly emerging, and these applications demonstrate the impact that context has on the adaptation process. From the context, it will be possible to adapt the application according to the requirements and needs of its users. Therefore, the quality of the context information must be guaranteed so that the application does not have an incorrect or unexpected adaptation process. But like any given data, there is the possibility of inaccuracy and/or uncertainty and so Quality of Context (QoC) plays a key role in ensuring the quality of context information and optimizing the adaptation process. To guarantee the Quality of Context it is necessary to study a quality model to be created, which will have the important function of evaluating the context information. Thus, it is necessary to ensure that the parameters and quality indicators to be used and evaluated are the most appropriate for a given type of application. This paper aims to study a context quality model for the UbiPri middleware, defining its quality indicators to ensure its proper functioning in the process of adaptation in granting access to ubiquitous environments. Keywords: QoC, Model, Context-Aware, Data, Privacy

Evaluation of Quality of Context Information in U-Health Smart Homes

2012 ◽  
pp. 179-215 ◽  
Author(s):  
José Bringel Filho ◽  
Nazim Agoulmine
Keyword(s):  
Health Systems ◽  
Smart Homes ◽  
Well Being ◽  
Context Information ◽  
Context Aware ◽  
Daily Lives ◽  
Quality Of Context ◽  
The Impact ◽  
Health And Well Being

Ubiquitous Health (U-Health) smart homes are intelligent spaces capable of observing and correctly recognizing the activities and health statuses of their inhabitants (context) to provide the appropriate support to achieve an overall sense of health and well-being in their inhabitants’ daily lives. With the intrinsic heterogeneity and large number of sources of context information, aggregating and reasoning on low-quality raw sensed data may result in conflicting and erroneous evaluations of situations, affecting directly the reliability of the U-Health systems. In this environment, the evaluation and verification of Quality of Context (QoC) information plays a central role in improving the consistency and correctness of context-aware U-Health applications. Therefore, the objective of this chapter is to highlight the impact of QoC on the correct behavior of U-Health systems, and introduce and analyze the existing approaches of modeling, evaluating, and using QoC to improve its context-aware decision-making support.

A Perspective about the Application of Quality of Context in U-Learning Environments

2016 ◽  
pp. 410-432 ◽  
Author(s):  
Felipe Becker Nunes ◽  
Fabricio Herpich ◽  
Gleizer Bierhalz Voss ◽  
Roseclea Duarte Medina
Keyword(s):  
Learning Environments ◽  
Usability Testing ◽  
Quality Parameters ◽  
Context Information ◽  
Advantages And Disadvantages ◽  
Quality Of Context

U-Learning environments collects context information relative to user's preferences and needs, but this information is typically very volatile. For this reason, Quality of Context is aimed at treating this information by applying quality parameters. This chapter aims to help the reader understand how the quality of context information can be treated in U-Learning environments, which are the main theoretical bases, technologies that support them and what are the methods, advantages and disadvantages related to this approach. In addition, specific cases of development and application of technologies and strategies involving Quality of Context are presented to illustrate all the concepts described. The results of usability testing related to the SUS questionnaire showed that the developed environment described in the case of study operated satisfactorily, based on the assessments made by the group of users who tested the modules and their operation.

scholarly journals Quality-of-Context and its use for Protecting Privacy in Context Aware Systems

2008 ◽  
Vol 3 (3) ◽  
Author(s):  
Kamran Sheikh ◽  
Maarten Wegdam ◽  
Marten Van Sinderen
Keyword(s):  
Context Aware ◽  
Quality Of Context

scholarly journals A Context-Aware Framework for Collaborative Activities in Pervasive Communities

2014 ◽  
Vol 5 (2) ◽  
pp. 31-43 ◽  
Author(s):  
Christopher Lima ◽  
Mário Antunes ◽  
Diogo Gomes ◽  
Rui Aguiar ◽  
Telma Mota
Keyword(s):  
Social Context ◽  
Context Information ◽  
Context Aware ◽  
Design And Development ◽  
Pervasive Environments ◽  
Collaborative Applications ◽  
Information Interpretation ◽  
Collaborative Activities

Pervasive environments involve the interaction of users with the objects that surround them and also other participants. In this way, pervasive communities can lead the user to participate beyond traditional pervasive spaces, enabling the cooperation among groups taking into account not only individual interests, but also the collective and social context. In this study, the authors explore the potential of using context-aware information in CSCW application in order to support collaboration in pervasive environments. In particular this paper describes the approach used in the design and development of a context-aware framework utilizing users' context information interpretation for behaviour adaptation of collaborative applications in pervasive communities.

Sign in / Sign up

Export Citation Format

Share Document