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Proposed Architecture (proposed + architecture)
Selected AbstractsVirtual laboratory: A distributed collaborative environmentCOMPUTER APPLICATIONS IN ENGINEERING EDUCATION, Issue 1 2004Tiranee Achalakul Abstract This article proposes the design framework of a distributed, real-time collaborative architecture. The architecture concept allows information to be fused, disseminated, and interpreted collaboratively among researchers who live across continents in real-time. The architecture is designed based on the distributed object technology, DCOM. In our framework, every module can be viewed as an object. Each of these objects communicates and passes data with one another via a set of interfaces and connection points. We constructed the virtual laboratory based on the proposed architecture. The laboratory allows multiple analysts to collaboratively work through a standard web-browser using a set of tools, namely, chat, whiteboard, audio/video exchange, file transfer and application sharing. Several existing technologies are integrated to provide collaborative functions, such as NetMeeting. Finally, the virtual laboratory quality evaluation is described with an example application of remote collaboration in satellite image fusion and analysis. © 2004 Wiley Periodicals, Inc. Comput Appl Eng Educ 12: 44,53, 2004; Published online in Wiley InterScience (www.interscience.wiley.com); DOI 10.1002/cae.20008 [source] High-performance hybrid information service architectureCONCURRENCY AND COMPUTATION: PRACTICE & EXPERIENCE, Issue 15 2010Mehmet S. Aktas Abstract We introduce a distributed high-performance Information Service Architecture, which forms a metadata replica hosting system to manage both highly dynamic small-scale metadata and relatively large static metadata associated with Grid/Web Services. We present an empirical evaluation of the proposed architecture and investigate its practical usefulness. The results demonstrate that the proposed system achieves high performance and fault tolerance with negligible processing overheads. The results also indicate that efficient decentralized hybrid Information Service Architectures can be built by utilizing publish-subscribe-based messaging schemes. Copyright © 2010 John Wiley & Sons, Ltd. [source] Experiences from the Implementation and Use of Multimedia Synchronization MechanismsEUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS, Issue 3 2000Theodoros H. Bozios This paper presents experiences from the implementation of Multimedia Synchronization Mechanisms related to the support of the many-to-one inter-media synchronization and describes the proposed Synchronization Architecture and its Design Objectives. The main goal of the communication system in the proposed architecture is to maintain the asynchrony levels between the media streams belonging in a Synchronization Group between the levels specitied by the Multimcdia Application. This is achieved through appropriate Synchronization Primitives related to the management and monitoring of the synchronization. The pilper emphasizes on the implementation issues and problems, and the solutions adopted. concluding to the lirst experiences from the use of the synchronization. [source] Architecture design, performance analysis and VLSI implementation of a reconfigurable shared buffer for high-speed switch/router,INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS, Issue 2 2009Ling Wu Abstract Modern switches and routers require massive storage space to buffer packets. This becomes more significant as link speed increases and switch size grows. From the memory technology perspective, while DRAM is a good choice to meet capacity requirement, the access time causes problems for high-speed applications. On the other hand, though SRAM is faster, it is more costly and does not have high storage density. The SRAM/DRAM hybrid architecture provides a good solution to meet both capacity and speed requirements. From the switch design and network traffic perspective, to minimize packet loss, the buffering space allocated for each switch port is normally based on the worst-case scenario, which is usually huge. However, under normal traffic load conditions, the buffer utilization for such configuration is very low. Therefore, we propose a reconfigurable buffer-sharing scheme that can dynamically adjust the buffering space for each port according to the traffic patterns and buffer saturation status. The target is to achieve high performance and improve buffer utilization, while not posing much constraint on the buffer speed. In this paper, we study the performance of the proposed buffer-sharing scheme by both a numerical model and extensive simulations under uniform and non-uniform traffic conditions. We also present the architecture design and VLSI implementation of the proposed reconfigurable shared buffer using the 0.18 µm CMOS technology. Our results manifest that the proposed architecture can always achieve high performance and provide much flexibility for the high-speed packet switches to adapt to various traffic patterns. Furthermore, it can be easily integrated into the functionality of port controllers of modern switches and routers. Copyright © 2008 John Wiley & Sons, Ltd. [source] A proactive management algorithm for self-healing mobile ad hoc networksINTERNATIONAL JOURNAL OF NETWORK MANAGEMENT, Issue 3 2008Adel F. Iskander The ability to proactively manage mobile ad hoc networks (MANETs) is critical for supporting complex services such as quality of service, security and access control in these networks. This paper focuses on the problem of managing highly dynamic and resource-constrained MANET environments through the proposal of a novel proactive management algorithm (PMA) for self-healing MANETs. PMA is based on an effective integration of autonomous, predictive and adaptive distributed management strategies. Proactive management is achieved through the distributed analysis of the current performance of the mobile nodes utilizing an optimistic discrete event simulation method, which is used to predict the mobile nodes' future status, and execution a proactive fault-tolerant management scheme. PMA takes advantage of distributed parallel processing, flexibility and intelligence of active packets to minimize the management overhead, while adapting to the highly dynamic and resource-constrained nature of MANETs. The performance of the proposed architecture is validated through analytical performance analysis and comparative simulation with the Active Virtual Network Management Protocol. The simulation results demonstrate that PMA not only significantly reduces management control overhead, but also improves both the performance and the stability of MANETs. Copyright © 2007 John Wiley & Sons, Ltd. [source] An efficient CMOS power-combining technique with differential and single-ended power amplifierMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 10 2010Eunil Cho Abstract This article proposes an efficient power-combining architecture with differential and single-ended power amplifiers (PAs) in a CMOS process. The single-ended amplifier is added for overall efficiency enhancement. To demonstrate this concept, a CMOS PA using the proposed architecture was fabricated with a 0.13-,m CMOS technology that delivers 30.6 dBm of output power with 42% drain efficiency and 38% power-added efficiency at 1.95 GHz. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2214,2217, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25460 [source] | |||||||||||||