Alireza Zarghami

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Collaborative Filtering based on similarity suffers from a variety of problems such as sparsity and scalability. In this paper, we propose an ontological model of trust between users on a social network to address the limitations of similarity measure in Collaborative Filtering algorithms. For enhancing the constructed network of users based on trust, we(More)
Health monitoring and healthcare provisioning for the elderly at home have received increasingly attention. Since each elderly person is unique, with a unique lifestyle, living environment and health condition, personalization is an essential feature of homecare software services. Service tailoring, which is creating a new service to meet individual(More)
—Dynamicity is one of the main challenges in providing sustainable solutions for the homecare domain. The dynamicity of homecare systems, caused by external entities like care-receivers and care-givers, can be addressed through combining distributed and heterogenous services both in design and runtime. In general, several research fields such as dynamic(More)
—In a service-oriented architecture, adaptive and evolvable applications should be able to select, configure and compose different existing application services to deal with the changes which can arise from runtime contextual changes or the change of user requirements and preferences. To support this, hybrid service composition approaches have been(More)
One of the biggest drivers behind IT-based home­ care solutions is the increasing aging population. We are specif­ ically interested in "service tailoring" for the homecare domain, where healthcare professionals (care-givers) do the tailoring of services to support elderly (care-receivers). Our goal is that, using our approach, care-givers can create or(More)
—In most of the industrialized countries, the aging of the population dramatically progress rapidly. This trend demands economically feasible solutions to provide care to elderly, preferably at their home. IT can play an important enabling role in such solutions. Previously, we proposed an approach for personalizing IT-based homecare services by introducing(More)
Most of the industrialized countries are facing a new situation which is the increasing number of elderly people and the enormous cost of associated healthcare. IT-based homecare services have been proposed as a solution to alleviate this problem. However, the adoption of the homecare services is hindered by the fact that there are many heterogeneous IT(More)
—In this paper we consider service-oriented applications composed of component services provided by different, economically independent service providers. As in all composite applications , the component services are composed and configured to meet requirements for the composite application. However, in a field experiment of composite service-oriented(More)
In this paper, we discuss possible risks posed by the application of tailorable context-aware systems in real-life practices. We use a tailorable context-aware system in the homecare domain as a case study to identify and analyse such risks. Next, we discuss which of these risks can be generalized to the use of tailorable context-aware system in other(More)