We give necessary and sufficient conditions for a 1-D DBCNN (1-dimensional discrete-time binary cellular neural network) with an external input to be stable in terms of connection coefficients. The results are general...
详细信息
Failure-over and recovery is a crucial issue for large-scale multimedia storage system (MSS). In the literature, there are two fail-over policies: active-standby fail-over and active-active fail-over. In this paper, w...
详细信息
ISBN:
(纸本)0780397460
Failure-over and recovery is a crucial issue for large-scale multimedia storage system (MSS). In the literature, there are two fail-over policies: active-standby fail-over and active-active fail-over. In this paper, we adopt an active-active policy and design two heuristic algorithms to determine the number and the placement of the object replicas among the multimedia servers. One is named as "minimum average waiting time" (MAWT) strategy, in which we will choose the server to store an object replica according to an optimal solution, and the other algorithm is named as "one of the best two choices" (OBTC) strategy, in which we will randomly choose one out of the first two best choices according to an optimal solution. We analyze their performance in the cases when the system runs normally and when some failure occurs. Via rigorous simulations, we find that when the system is running normally (without failures), MAWT performs better than OBTC and when some server fails, OBTC performs much better than MAWT
Mobile devices are increasingly aware of their respective locations and vicinity and tend to communicate rather loosely with each other;therefore asynchronous communication paradigms are used predominately so far for ...
详细信息
Some of the key issues in building services for large scale distributedsystems, realizing Vishwa, a peer-to-peer (P2P) middleware architecture for developing grid applications are discussed. Researchers are producing...
详细信息
Some of the key issues in building services for large scale distributedsystems, realizing Vishwa, a peer-to-peer (P2P) middleware architecture for developing grid applications are discussed. Researchers are producing large amounts of scientific data and believe that distributed computations on the data must be scheduled and available to a large number of scientists. It is suggested that the platform must scale up to a large number of nodes and data units in the system and must also be scalable geographically. A scalable, reconfigurable shared-object space over the two-layer architecture can be developed that incorporates mechanisms to maintain replicated data and must also provide a shared-object abstraction over a wide-area distributed system.
In this paper, we present a robot middleware technology named Robot Software communications Architecture (RSCA) for its use in networked home service robots. The RSCA provides a standard operating environment for the ...
详细信息
The Java messaging service (JMS) is a means to organize communication among distributed applications according to the publish/subscribe principle. If the subscribers install filter rules on the JMS server, JMS can be ...
详细信息
The Java messaging service (JMS) is a means to organize communication among distributed applications according to the publish/subscribe principle. If the subscribers install filter rules on the JMS server, JMS can be used as a message routing platform, but it is not clear whether its message throughput is sufficiently high to support large-scale systems. In this paper, we investigate the capacity of the high performance JMS server implementation by Fiorano. In contrast to other studies, we focus on the message throughput in the presence of filters and show that filtering reduces the performance significantly. We also present a model that describes the service time for a single message depending on the number of installed filters and validate it by measurements. This model helps to forecast the system throughput for specific application scenarios.
This paper discusses the challenges associated with privacy in health care in the electronic information age based on the Health Insurance Portability and Accountability Act (HIPAA) and the Security Rules. We examine ...
详细信息
MPLS fast reroute (MPLS-FRR) mechanisms deviate the traffic in case of network failures at the router closest to the outage location to achieve an extremely fast reaction time. We review and compare the one-to-one bac...
详细信息
ISBN:
(纸本)9783800729593;3800729598
MPLS fast reroute (MPLS-FRR) mechanisms deviate the traffic in case of network failures at the router closest to the outage location to achieve an extremely fast reaction time. We review and compare the one-to-one backup and the facility backup concept that are options for MPLS-FRR to deviate the traffic via a detour or a bypass, respectively. Basically, the backup paths can take the shortest path that avoids the outage location from the point of local repair to the tail-end router or to the merge point. We then evaluate the backup capacity requirements and the configuration overhead in terms of the number of backup paths per primary path in a parametric study depending on the network characteristics. While the facility backup concept imposes clearly less configuration overhead than the one-to-one backup, its standard path layout requires more capacity. This can be reduced by a simple modification.
This paper proposes the use of a wireless sensor network of "cat's eye" augmented with embedded processing, communication, and sensing capabilities to monitor vehicle behaviour on augmented roads. The pr...
详细信息
This paper proposes the use of a wireless sensor network of "cat's eye" augmented with embedded processing, communication, and sensing capabilities to monitor vehicle behaviour on augmented roads. The primary goal of the system is to provide drivers with early warning of potentially dangerous situations that may arise. The focus of the paper is on the software architecture needed and the technical challenges to be overcome in order to support this and related applications
暂无评论