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Massive multiplayer online games are large-scaled distributed systems to handle a huge amount of simultaneous players. Thus, development costs can be enormous. To deal with this, it is necessary to reduce redundant development steps in such distributed systems, e.g. by using code generators and model analysers to build components from already existing knowledge. Such knowledge could be the unique...
Self-adaptive systems are modern applications in which the running software system should be able to react on its own, by dynamically adapting its behavior, for sustaining a required set of qualities of service, and dynamic changes in the context or in user requirements. They are typically involved in Future Internet development such as the Internet of Things where interoperability, flexibility, and...
With a plethora of sensors and ubiquitous access to the Internet, modern smartphones have enabled a broad range of context-based applications. Most applications make use of the user's physical location to filter relevant content. However, filtering based on dynamic contextual information results in high complexity of the filtering process. This limits the applicability of existing publish/subscribe...
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),...
This paper presents an event-based communication middleware developed for a fairly large pervasive display network installed in a city center. We demonstrate the feasibility of the middleware with a set of dynamic and distributed prototype applications implemented for the display network. We also conduct an empirical performance evaluation of the middleware in lab and real world settings.
When migrating applications between devices during runtime, one has achieved application mobility. In this paper we present the XAM system, providing application mobility through a peer-to-peer based solution over heterogeneous networks. Our architecture takes into consideration established requirements of application mobility, being application identification and distribution; context-awareness and...
Wireless Sensor Networks are becoming one of the most successful choices for the development and deployment of applications in a range of scenarios, from intelligent homes to environment monitoring. Nowadays, there is a growing demand for programming large-scale wireless sensor networks. New programming paradigms should ease the task of building WSN applications that adapt at run-time to changes in...
Distributed systems like crisis management are subject to the dissemination of a huge volume of heterogeneous events, ranging from low level network data to high level crisis management intelligence, depending on the role of the rescue teams involved. In such systems, Complex Event Processing (CEP) has emerged as a solution to detect and react (in real-time) to complex events, which are correlations...
One of the key characteristics of pervasive computing applications is their ability to adapt to their environment. One possible approach to simplify the development of such adaptive applications is to use middleware to automate adaptation decisions. However, in many application scenarios, adaptation decisions can have critical security implications. Thus, when designing middleware to support adaptation...
The great variety of consumer electronic devices with support of wireless communications combined with the emerging Cloud Computing paradigm is paving the way to real anytime/anywhere computing. In this context, many services, such as music or video streaming, are delivered to the clients using Cloud-based providers. However, service continuity when moving across different terminals is still a major...
This paper presents the Robotics Service Bus (RSB), a new message-oriented, event-driven middleware based on a logically unified bus with hierarchical structure. Major goals for the development of RSB were openness and scalability in order to integrate diverse components in the context of robotics and intelligent systems. This includes the ability to operate on embedded platforms as well as desktop...
We present a context-aware architecture that supports seamless coordination and management of hardware devices through adaptive services. The context-aware architecture will trigger intelligent and automatic services according to the context information (user context, environmental context, context computing). This paper proposes the architecture supports context management, location tracking, selection...
One of the most important feature of a MAS (Multi-Agent System) is the cooperation and the coordination among agents placed in distributed environments. Due to the high heterogeneity of agents and platforms, interoperability has become a key issue for the use of MASs in academic and industrial fields. Several approaches to interoperability proposed so far are based on the JAVA technology exploiting...
The current ever-growing advances in wireless networking and the great success of mobile computing have contributed to the development of an increasing amount of mobile services. Due to this growth of published services, quality of service (QoS) is becoming a key feature to provide the most appropriate needed service to mobile clients according to their requirements. However, managing QoS represents...
Context-aware applications demand for a distributed middleware that can collect, aggregate and deliver contextual data for applications. This paper presents one of the main components, Context-Sources Abstraction (CSA), in a middleware for building context-aware applications. The CSA component includes a set of query interfaces and an event notification mechanism to applications. In this way, the...
Mobile devices like PDAs or mobile phones have become widespread. Similarly network functionality like GSM, Bluetooth or WLAN has become a standard. Nevertheless, not many applications take mobility into account. An application and its communication component are tightly coupled and the applications assume that network behavior does not change. Here in this project we propose and implement a new component...
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...
JXTA is a set of open protocols that enable the creation and deployment of peer-to-peer (P2P) networks, allowing the execution of services in a distributed manner. Being a generic P2P middleware, it has slowly evolved in order to appeal a broad set of different applications. Part of this evolution includes providing basic security capabilities in its protocols in order to achieve some degree of message...
Mobile devices like PDAs or mobile phones have become widespread. Similarly network functionality like GSM, Bluetooth or WLAN has become a standard. Nevertheless, not many applications take mobility into account. An application and its communication component are tightly coupled and the application assumes that network behavior does not change. Here in this paper we propose a new lightweight architecture...
In wireless mobile networks, because of low bandwidth, long delay, low reliability, disconnecting frequently and differences in many platforms of commercial services etc., it is difficult to get a stable and high quality commercial service. For this case, a flexible interface, context-aware and intelligent mobile E-commerce platform is designed. It connects kinds of commercial services platforms efficiently...
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