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With the aging society, increasing personal health devices (PHDs) have been produced with different data transmission methods and packets. IEEE 11073 was drafted to tackle this difference. Conjunction with a number of transport technologies, 11073 protocol-suite were selected by Continua alliance to promote the standardization of personal health devices. In this paper, a data acquisition system based...
Context-aware computing is a lethal paradigm for making technology inconspicuous in people's lives. It is a disruptive technology capable of transforming and enriching human experience. Traditionally, applications collected context data directly from sensors and utilized them to target a narrow set of use cases. However, this is not a scalable approach. With the advent of Internet of Things (IoT),...
Partitioned Global Address Space (PGAS) programming models like Open SHMEM and hybrid models like Open SHMEM+MPI can deliver high performance and improved programmability. However, current implementations of Open SHMEM assume a fully-connected process model which affects their performance and scalability. We address this critical issue by designing on-demand connection management support for Open...
Desktop Grid is among the success stories during last years by using volunteers nodes participating into projects. Now, with the emergence of Cloud Computing, the questions become where to take resources? and how to coordinate the resources? Our assumption is that Desktop Grid will continue to survive if we are able to transform the old-fashioned client/server architecture to new web oriented architecture...
A contemporary governance challenge for governments concerns the biogas domain: what incentives and policies can lead to a viable biogas economy? To support addressing this challenge, a prototype of a simulator is constructed in which horizontal governance is applied in a multi-stakeholder context. This paper reports on the modelling and knowledge acquisition that led to the development of that prototype...
In the future Internet of Things (IoT), smart objects will be the fundamental building blocks for the creation of cyber-physical smart pervasive systems in a great variety of application domains ranging from health-care to transportation, from logistics to smart grid and cities. The implementation of a smart objects-oriented IoT is a complex challenge as distributed, autonomous, and heterogeneous...
Communication technologies are crucial in ubiquitous systems, and consequently, in AmI Systems. Developers should be able to make design decisions about these technologies in order to fulfill the requirements of each specific system. As a consequence, choosing and using specific ones (protocols, middleware, networking technologies, etc.) is actually not only a technical but a design problem that has...
Distributed virtual reality systems (DVR systems) have evolved significantly over the past twenty years and found wide spread in many applications for training, educational and entertainment purposes. Modern DVR systems require sophisticated data exchange mechanisms to provide consistent interaction of a large number of users over the Internet. While many of these mechanisms have been well studied,...
A computer aided network evaluation and optimization platform is presented to help the development of WSN application. This middleware together with the existing network simulators replace the function of field test during the process of WSN designs. The proposed platform reduces engineering cost and increases development efficiency. Furthermore, the network optimization is implemented in the platform...
Modern collaborative virtual environments (CVEs) require sophisticated data exchange mechanisms to provide consistent and at the same time responsive interaction of a large number of users. While many of these mechanisms have been well studied, usually they represent isolated solutions requiring knowledge of low-level networking programming for implementation. In this regard, there is still a lack...
The publish/subscribe paradigm is used to support a many-to-many model that allows an efficient dissemination of messages across a distributed system. Message Oriented Middleware (MOM) is a middleware that provides an asynchronous method of passing information between networked applications. MOMs can be based on a publish/subscribe model, which offers a robust paradigm for message delivery. This paper...
Recent studies show that Information Centric is one of the best ways to help Internet users find useful messages among a myriad of information. With the help of a publisher/subscriber structure, users could use this Information Centric System to subscribe to messages they have interest or from the ones their friends have recommended. However, with the increasing usage of smart phones and computers,...
The pervasive computing vision of the future communication and computational infrastructure is that we will be everywhere virtually connected with invisible computers, embedded in the environment. In this context, the challenge is to provide a middleware support that allows applications to have minimal assumptions about the environment while being able to dynamically adapt to the surrounding context...
In this paper we present a distributed event driven middleware architecture for situational awareness and intelligent decision making for command and control of geographically distributed networked battlefield agents. We tackle the important and challenging issues of distributed agents scheduling, synchronization, load balancing, and terrain database distribution/management/allocation in a distributed...
We present online tunable diagnostic and membership protocols for generic time-triggered (TT) systems to detect crashes, send/receive omission faults, and network partitions. Compared to existing diagnostic and membership protocols for TT systems, our protocols do not rely on the single-fault assumption and also tolerate non-fail-silent (Byzantine) faults. They run at the application level and can...
Replication is a technique widely used in parallel and distributed systems to provide qualities such as performance, scalability, reliability and availability to their clients. These qualities comprise the non-functional requirements of the system. But the functional requirement consistency may also get affected as a side-effect of replication. Different replica control protocols provide different...
To address the problem of service composition in pervasive computing, and to provide the IGRS ubiquitous devices the abilities of inter-operation and cooperation, we design the UDIO, a middleware of dynamic service composition based on IGRS protocol. In this paper, the system architecture of UIDO, as well as a matrix-based path-finding algorithm for service composition, are introduced which prove...
Replication is a technique widely used for achieving qualities like scalability, high performance, high availability and fault tolerance in computer systems. Consistency of the system state is another quality that may also vary as a side effect of replication. There are various configurations of replication architecture and of replica control protocols that provide various levels of these system qualities...
Cloud computing has been extremely tropical in the past few years. Both academic and industrial people have shown great interest in this area. Platform as a Service, which is the core application of cloud computing technologies, has got much attention as well. In this article, from the basic concept of PaaS, we analyze the basic characteristics of PaaS, and describe the current research status. Also...
The rapid development of information technology offers people a broad information-sharing platform. We can get relevant information through information retrieval tools. In order to get higher search efficiency, the information retrieval technologies based on semantic grid are discussed. Based on analysis of the technologies of grid, semantic grid and information retrieval, the architecture of grid...
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