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This paper proposes a feature-oriented approach for Web services customization that can address three key challenges: reducing complexity, automated validation and dynamic deployment. We exploit techniques from Software Product Line (SPL) domain, particularly feature modeling techniques, to design our framework. Feature modeling allows to abstract(More)
A single-instance multi-tenant (SIMT) SaaS application enables a SaaS provider to achieve economies of scale through runtime sharing. However, runtime sharing can make tenant-specific variations difficult to achieve in such an application. In this paper, we propose an approach to realizing SIMT SaaS applications, which is based on Dynamic Software Product(More)
Femtocell is expected to overcome drawbacks of cellular wireless communications in indoor environments. Recently, effective deployment of femtocell networks inside high speed moving vehicles is an interesting topic for researchers. In this paper, we propose a novel handover scheme utilizing coordinated multiple point transmission (CoMP) in high speed moving(More)
Due to differences in consumer requirements, a Web service usually has multiple service variants for use in different business contexts. In such situations, delivering customizable services helps increase efficiency not only in service description and publication but also in service consumption. However, existing approaches for providing customizable(More)
Spatial crowdsourcing has gained emerging interest from both research communities and industries. Most of current spatial crowdsourcing frameworks assume independent and atomic tasks. However, there could be some cases that one needs to crowdsource a spatial complex task which consists of some spatial sub-tasks (i.e., tasks related to a specific location).(More)
One challenge in the context-aware environment is to detect users' presence in a natural way and to process such information in order to provide suitable services for users. This paper introduces PlaceSense, an application using bluetooth technology, building on top of the Place-based Virtual Community architecture that can detect users presence for(More)
There is increasing interest in context-aware applications, ranging from traffic routing, location-based services, friend finding, context-aware messaging, virtual tour guides, to physical world search. We make three observations: (i) many context-aware applications use knowledge about the individuals (and groups of people), places and objects within a(More)