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Services are increasingly becoming the building block of today's distributed systems. However, to support the development of robust complex applications made up of ensembles of cooperating service components and to promote autonomic features, adaptive collaboration patterns among components have to be enforced. In this paper, we introduce a taxonomy of adaptive agent-based collaboration patterns,...
As a consequence of the heterogeneity of devices and services, users receive a large volume of information that is generally not relevant to their characteristics. Therefore, the need to provide information that is significant to the user arises, which leads to the use of information adaptation, process in which a service is enriched with a set of characteristics. This process tailors information...
People, who have some degree of disability, generally have difficulties in social integration, education and labor. This paper presents the design and implementation of a system which, thanks to its adaptive characteristics, presents the content and display of the course topics at an educational environment, considering the characteristics and needs of people with and without hearing disability. The...
Air Traffic Management (ATM) has embraced the concept of System Wide Information Management (SWIM) as the means to improve data exchange between various applications in different domains such as flight data management, weather and aeronautical information management. Even though SWIM definitions in the US and Europe put emphasis at different aspects in their NextGen and SESAR (Single European Sky...
This paper provides an overview of the theoretical underpinnings being used to develop an adaptive collaboration tool that can be used to assess and influence individual behavior and group performance. The tool is being developed using a variety of theories and conceptual models taken from the Organizational Psychology literature that may shed light on how individuals organize for a common purpose...
This paper presents technology-mediated strategies and a technical infrastructure design for supporting self-regulated learning in open responsive learning environments which are individually compiled by the learners themselves. A self-regulated learning process model has been defined to connect the self-regulated learning approach with concrete learning activities performed to create and use own...
Flexible interactions in complex social and service-oriented collaboration systems increasingly demand for automated adaptation techniques to optimize partner discovery and selection. Today, applications of complex service-oriented systems can be found in crowd sourcing environments. In such environments, collaborations are typically short-lived and strongly influenced by incentives and actor behavior...
The convergence of Internet and mobile devices has radically changed the way people communicate and interact with each other, and demand for applications that are "social" enough to assist their daily interactions. To support such device mediated interactions, the social relationships between actors need to be systematically modeled and represented. In addition, an application facilitating...
The ability to deal with the requirements and preferences of mesh clients and their applications is still left aside in the recent trends for Wireless Mesh Networks (WMNs). In this paper, we split a WMN into a multitude of logical networks through virtualization, each one appropriate to specific levels of context features, e.g., security and cost preferences, mobility, and applications' requirements...
Metamodels evolve over time, as well as other artifacts. In most cases, this evolution is performed manually by stepwise adaptation. In most cases, metamodels are described using the MOF language. Often OCL constraints are added to metamodels in order to ensure consistency of their instances (models). However, during metamodel evolution these constraints are omitted or manually rewritten, which is...
In this paper, we propose the bitwise structured prediction model for lossless image coding, especially for the oscillatory regions. The learning-based model utilizes the regular features obtained from the predicted local data. At first, the pixel-wise prediction is decomposed into the bitwise ones. In each bit plane, the prediction of the current bit is simplified to the max margin estimation for...
Context-aware applications do not always adapt their behaviours in ways that users expect due to a variety of reasons. Applications that lack intelligibility are often incapable of offering explanations to users as to why they decided to adapt their behaviours in certain ways, and providing feedback mechanisms for users to take control of any unwanted adaptation. This can lead to loss of user trust,...
Service computing aims to provide IT and computing resources to users in a way that it simply serves them. However, many issues remain in, such as portability, interoperability, and heterogeneity of diverse services, in addition to service modeling, creation, deployment, discovery, recommendation, composition, and delivery, in order to provide a service that best fits user needs and contexts at the...
Conventional layered protocols are not capable to handle the vagaries of Wireless Mesh Networks (WMN) such as rapidly changing wireless channel quality, battery power and network topology. Most WMN cross-layer proposals to overcome these problems utilize only a limited set of parameters from the concerned layers rendering them incapable of network and system wide optimizations as they do not consider...
Due to the high cost of replication, incurred mainly by consistency management, it may be infeasible to use uninformed object replication in collaborative applications in pervasive environments, since resources are constrained, nodes are heterogeneous, and application behaviour is highly dynamic. Consequently, this paper proposes an adaptive replication scheme that dynamically creates and releases...
In this paper, we study adaptive nonlinear turbo equalization to model the nonlinear dependency of a linear minimum mean square error (MMSE) equalizer on soft information from the decoder. To accomplish this, we introduce piecewise linear models based on context trees that can adaptively choose both the partition regions as well as the equalizer coefficients in each region independently, with the...
Specific properties of MANETs results in basic differences between wired networks and wireless networks in security solutions. In recent years, trust models have established themselves as a main approach for security and performance improvement of sections of MANETs. Recent researches have used trust models for problems like routing, admission control and information sharing in MANETs. In spite of...
Mobile technology has opened up new chances to create organizational communication and customer value. The consumer-sided adoption of mobile technology and services not only increased interest among practitioners, but also among researchers of different disciplines. To analyze antecedents of mobile technology adoption and usage intention prior studies mainly applied the Technology Acceptance Model...
Context-aware computing has been considered as promising topic in pervasive computing area, but a review of the existing approaches shown that developing diverse application services in this area is still motivated based on the analysis of existing approaches in literature. The purpose of this study, is proposed the composite context information model to provide the knowledge that is determine the...
With the advent of ubiquitous computing environments it has become increasingly important for applications to take full advantage of Context aware computing to increase the satisfaction of the users in entertainment services. The contextual information, such as, user location, user's profile, user interest, user role, user age, etc has to be considered to offer greater services to the user without...
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