The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The following topics are dealt with: distributed computing system; wireless and mobile ad hoc network; Web service and service-oriented architecture; autonomic and adaptive systems; grid computing and utility computing.
In many mission critical applications, one of the central tasks is to obtain aggregate values, such as AVERAGE and SUM, based on which critical conditions can be detected. Immediate measures can subsequently be taken to remove associated risks timely. However, there is no successful work for detecting such critical events energy efficiently. In this paper we propose a novel approach. A fully distributed...
As wireless connectivity is integrated into many handheld devices, streaming multimedia content among mobile ad-hoc peers is becoming a popular application. In this paper, we propose a dynamic service replication algorithm for providing guaranteed continuous streaming services to all nodes in mobile ad-hoc networks (MANETs). First, a MANET is comprised of logical grid hierarchy, and a streaming service...
Nowadays IEEE 802.11 family is the most popular technology amongst wireless protocols including Bluetooth, UWB and WiMAX for wireless services, among which media streaming such as voice over Internet Protocol (VoIP) and IPTV are most demanded with high challenge. To accommodate the QoS issues, EDCA and HCCA functions are defined in IEEE 802.11e. However, EDCA provides QoS based on probability, so...
OSGi framework enables diverse devices to conveniently establish a local area network environment such as homes, offices, and automobiles. Access control is one of the crucial parts which should be considered in such emerging environments. However, the current OSGi authorization mechanism is not rigorous enough to fulfill security requirements involved in dynamic and open OSGi environments. This paper...
Service composition accelerates rapid application development, service reuse, and complex service consummation, thus, quantitative characteristics such as service execution throughput should be evaluated to measure the system performance. Based on Continuous Petri Net, we build differential equation model for service composition. The service behavior can be analyzed from the curves of the solutions...
Service-Oriented Architecture (SOA) is a conceptual architecture that was proposed for supporting service-oriented computing. To obtain a successful design and development of service-oriented software, an architectural view model to represent and document various aspects of service-oriented software based on the SOA conceptual template is required. Various architectural view models have been proposed...
Middleware for timely and reliable data dissemination is a fundamental building block of the event driven architecture (EDA), an ideal platform for developing air traffic control, defense systems, etc. Many of these middlewares are compliant to the data distribution service (DDS) specification and they have been traditionally designed to be deployed on managed environments where they show predictable...
Evolvability is essential to adapting to the dynamic and changing requirements in response to the feedback from context awareness systems. However, most of current context models have limited capability in exploring human intentions that often drive system evolution. To support service requirements analysis of real-world applications in distributed service environments, this paper focuses on human-intention...
Using the Internet to enhance e-learning has become a trend in modern higher education institutes. E-learning systems are increasingly becoming an important part of the strategy for delivering online and flexible e-learning. The main advantage of e-learning is the opportunity for students to interact electronically with each other and their teachers during forums, on discussion boards, by e-mail and...
Grids and service-oriented technologies are emerging as dominant approaches for distributed systems. Rising complexity of grid applications places new requirements and increases needs to improve the design and reusability of grid workflow systems. In particular, scientific data-intensive workflows require new approaches for integration and coordination of distributed resources. Traditional centralized...
The rapid adoption of SOA in many large-scale distributed applications requires the development of adaptive service-based software systems (ASBS), which have the capability of monitoring the changing system status, analyzing and controlling tradeoffs among multiple QoS features, and adapting its service configuration to satisfy multiple QoS requirements simultaneously. In this paper, a performance-model-oriented...
Location based services (LBS) are expected to play crucial role in future of e-commerce. Although, LBS consider service provision on the basis of location, but don't take into consideration time aspect and user's interests. We propose incorporation of time-awareness and demand-oriented contexts along with location to develop idea of community pervasive services (CPS).To identify appropriate service...
In a structured peer-to-peer (P2P) overlay network, the stability of the entire network will be greatly affected by simultaneous join-in and drop-out of large amount of nodes. Aiming at reducing the overhead of handling this activity, we propose a group-based hierarchically structured overlay network, GSON. GSON is also a structured P2P overlay network using distributed hash table (DHT). In GSON,...
Computational grid is a cooperative computing environment which collects all kinds of high performance software and hardware computing resources distributed in WAN and provides networked computing services. The computational grid systems that have been the focus of much research activities in the past years for controlled sharing of resources across institutional boundaries. Credit is one major concern...
In solving large-scale computation problems using open standards over networks, grid computing must deal with geographically distributed heterogeneous resources, including differing computing platforms, hardware, software, architectures, and languages that are owned by various administrative domains. As grid numbers worldwide increase, multi-institution collaborations grow rapidly as well. However,...
Service-oriented computing (SOC) has been traditionally applied in Web-based applications. The recent development shows that SOC can play an important role in embedded systems and robotics applications to address their limitations in capacity, versatility of application fields, and extensibility in requirements of such systems. This paper presents the design, implementation, and simulation results...
Service orchestration languages such as BPEL have been established as de facto standard for the composition of Web services within service oriented architectures (SOA). Nevertheless, Web applications following the same principle of combining already existing services are still created as Mashups by coding against open 3rd party APIs. Within this paper, we build on a formal model for the representation...
The heterogeneity, distribution and dynamicity of web services hamper WSRF (Web service resource framework) of grid to exert its excellences in resource integrations. In this paper, we propose our SOV (service orient virtualization) model for medical image grid (MedImGrid), which creates a virtual middle layer for grid to simplify the transformation from users' business aims to executable web-service...
Along with the development of object-oriented technology, component development is gradually extended to commercial off-the-shelf (COTS) components and component-based software development (CBSD) has gradually become the dominant orientation of the field of software engineering. The claims of high reliability need further investigation based on reliability analysis techniques that are applicable to...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.