Peer-to-peer communication is emerging as one of the most potentially disruptive technologies in the networking sector. If the interest in such technologies as Napster, Morpheus and Gnutella is any indication, peer-to...
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ISBN:
(纸本)0769520367
Peer-to-peer communication is emerging as one of the most potentially disruptive technologies in the networking sector. If the interest in such technologies as Napster, Morpheus and Gnutella is any indication, peer-to-peer networks will be a major component in the future of computer communications and the Internet. In this work, we conducted a case study by implementing the Xiangqi game using a P2P networking technology. In so doing, we gained a deeper understanding of P2P communication in general and a more in-depth knowledge of the specific technology used. We encountered a number of issues while implementing our multimedia application using the JXTA P2P framework, but we were nevertheless able to create a working prototype that functioned satisfactorily. We thus concluded that P2P was a feasible alternative to the current server-based multi-player gaming paradigm.
Problems of development of distributed simulation system are discussed in this paper. the architecture and the realization of distributed simulation system DSS that is realized for parallel computer RM600-E30 are desc...
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ISBN:
(纸本)3540406735
Problems of development of distributed simulation system are discussed in this paper. the architecture and the realization of distributed simulation system DSS that is realized for parallel computer RM600-E30 are described. Directions for the further development of this system are defined.
"Smart things" are commonly understood as wireless ad-hoc networked, mobile, autonomous, special purpose computing appliances, usually interacting withtheir environment implicitly via a variety of sensors o...
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ISBN:
(纸本)0769520367
"Smart things" are commonly understood as wireless ad-hoc networked, mobile, autonomous, special purpose computing appliances, usually interacting withtheir environment implicitly via a variety of sensors on the input side and actuators on the output side. Such smart appliances have started to populate the "real world" with "hidden" or "invisible" services, thus building up an "invisible world" of services associated with real world objects. Withthe embedding of invisible technology into everyday things, however, also the intuitive perception of "invisible services" disappears. We believe that it has potential advantages to support the perception of smart appliance services via novel interactive visual experiences. For this purpose we have developed and built DigiScope, a see-through based visual real time perception system for "invisible worlds" to support interactive theater experience in mixed reality spaces. A case study is presented that demonstrates the use of DigiScope to percept the "invisible services" of our smart Internet appliance SmartCase. Opposed to previous work on mixed reality based augmentation of reality, the DigiScope approach allows for a multiuser, collaborative real time perceptual experience.
the proceedings contain 24 papers. the topics discussed include: interest management in agent-based distributed simulations;enabling real-time distributed virtual simulation over the internet using host-based overlay ...
ISBN:
(纸本)0769520367
the proceedings contain 24 papers. the topics discussed include: interest management in agent-based distributed simulations;enabling real-time distributed virtual simulation over the internet using host-based overlay multicast;heterogeneous architecture and testbed for simulation of large-scale real-time systems;adaptive scheduling techniques for multimedia computing in hard real-time systems;real time inspection of hidden worlds;an agent architecture for network support of distributed simulation systems;model based network emulation to study the behavior and quality of real-time applications;peer-to-peer suitability for collaborative multiplayer games;an event-synchronization protocol for parallel simulation of large-scale wireless networks;and time warp cancellation optimizations on high latency networks.
We investigate the performance of the time warp kernel APSIS when running on various communication layers, in particular on a wide-area grid. Several cancellation strategies are tried, among them the lazy cancellation...
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Large Data warehouses (DW) put a major challenge in what concerns performance and scalability, as users request instant answers to their queries. Traditional solutions relying on very expensive architectures and struc...
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ISBN:
(纸本)0769519814
Large Data warehouses (DW) put a major challenge in what concerns performance and scalability, as users request instant answers to their queries. Traditional solutions relying on very expensive architectures and structures cannot turn every complex aggregation query into minutes or seconds answers. the summary warehouse (SW) achieves such a speedup using only general-purpose sampling summaries well-fit for aggregated exploration analysis. the major limitation of SWs results from the tradeoff between accuracy and speed: smaller, faster summaries cannot answer less-aggregated queries. We propose a simple and cheap strategy to meet these conflicting requirements and deliver unseen speedup by taking advantage of distributed computation ubiquity. the distributed summaries approach (DS) proposed in this paper manages a distributed set of summaries that are put in available computing nodes of a local area network to achieve very fast query processing, while guaranteeing enough accuracy.
Many-to-many multicast transmission is an essential network capability for scalable distributed simulation. the many open issues that make network-layer multicast impractical over the Internet today are likely to cont...
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ISBN:
(纸本)0769520367
Many-to-many multicast transmission is an essential network capability for scalable distributed simulation. the many open issues that make network-layer multicast impractical over the Internet today are likely to continue to be insurmountable and to prevent deployment in a manner that will meet the Quality of Service (QoS) and many-to-many multicast needs of real-time distributed virtual simulation (RT-DVS). We propose an alternative approach, whereby the IP multicast function is relocated to the simulation host computer and also used to provide for QoS enabled services on a priority basis. this paper explores the concept of such a host-based multicast system with QoS and its suitability for RT-DVS. the paper defines the basic requirements of a host-based multicast protocol to support RT-DVS and proposes a quantitative model for evaluation of system alternatives.
the proceedings contain 53 papers. the special focus in this conference is on Software, Applications and Tools. the topics include: Solving of the alignment and scheduling problems;accuracy and stability of spatial dy...
ISBN:
(纸本)3540406735
the proceedings contain 53 papers. the special focus in this conference is on Software, Applications and Tools. the topics include: Solving of the alignment and scheduling problems;accuracy and stability of spatial dynamics simulation by cellular automata evolution;resource similarities in Petri net models of distributed systems;authentication primitives for protocol specifications;an extensible coloured Petri net model of a transport protocol for packet switched networks;parallelcomputing for globally optimal decision making;parallelization of alternating direction implicit methods for three-dimensional domains;an approach to assessment of heterogeneous parallel algorithms;a hierarchy of conditions for asynchronous interactive consistency;associative parallel algorithms for dynamic edge update of minimum spanning trees;the renaming problem as an introduction to structures for wait-free computing;graph partitioning in scientific simulations;process algebraic model of superscalar processor programs for instruction level timing analysis;a polymorphic type system for bulk synchronous parallel ml;towards an efficient functional implementation of the NAS benchmark ft;a fast pipelined parallel ray casting algorithm using advanced space leaping method;formal modeling for a real-time scheduler and schedulability analysis;global system image for cluster computing;asynchronous timed multimedia environments based on the coordination paradigm;component-based development of dynamic workflow systems using the coordination paradigm;an efficient marshaling framework for distributed systems;deciding optimal information dispersal for parallelcomputing with failures and communication-efficient parallel Gaussian elimination.
An efficient (un)marshaling framework is presented. It is designed for distributed applications implemented in languages such as C++. A marshaler/unmarshaler pair converts arbitrary structured data between its host an...
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ISBN:
(纸本)3540406735
An efficient (un)marshaling framework is presented. It is designed for distributed applications implemented in languages such as C++. A marshaler/unmarshaler pair converts arbitrary structured data between its host and network representations. this technology can also be used for persistent storage. Our framework simplifies the design of efficient and flexible marshalers. the network latency is reduced by concurrent execution of (un)marshaling and network operations. the framework is actually used in Mozart, a distributed programming system that implements Oz, a multi-paradigm concurrent language. Mozart, including the implementation of the framework, is available at ***.
Computer Science has witnessed the emergence of a plethora of different logics, models and paradigms for the description of computation. Yet, the classic Church–Turing thesis may be seen as indicating that all genera...
Computer Science has witnessed the emergence of a plethora of different logics, models and paradigms for the description of computation. Yet, the classic Church–Turing thesis may be seen as indicating that all general models of computation are equivalent. Alan Perlis referred to this as the ‘Turing tarpit’, and argued that some of the most crucial distinctions in computing methodology, such as sequential versus parallel, deterministic versus non-deterministic, local versus distributed disappear if all one sees in computation is pure symbol pushing. How can we express formally the difference between these models of computation?
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