In this paper, we present a structure for monitoring a large set of computational clusters. We illustrate methods for scaling a monitor network comprised of many clusters while keeping processing requirements low. A design for presenting high-level web-based summaries of the monitor network is provided, along with a generalization to a distributed, multipleresolution monitoring tree. Emphasis i...

This paper considers the problem of establishing robust routes for user connection requests in an WDM network dynamically. The problem is to nd two edgedisjoint routes with satisfying certain given properties. One route will serve as the primary path, and another will serve as the backup path which will replace the primary path if there is any link failure in the primary path. Two versions of t...

Recent developments in networking technology cause a growing interest in connecting local-area clusters of workstations over wide-area links, creating multilevel clusters. Often, latency and bandwidth differences between local-area and wide-area network links are two orders of magnitude or more. With such a large difference, one would expect only very coarse grain applications to achieve good p...

The growing importance of real-time computing in numerous applications poses problems for network architectures, especially safety-critical Wide Area Networks (WANs). Assessing network performance in safety-critical real-time systems is difficult, and suggests the use of both human and technical performance criteria because of the importance of both dimensions in safety-critical settings. This ...

Over the past two years a combination of circumstances has fueled intense efforts to rethink the integration of IP networking and mass storage. Chief among these facts are the universal acceptance of Internet technologies for network infrastructure, the relentless acceleration of the Ethernet substrate, and the ongoing, exponential rise in the amount of data that must be moved and managed. Take...

Java’s support for parallel and distributed processing makes the language attractive for metacomputing applications, such as parallel applications that run on geographically distributed (wide-area) systems. To obtain actual experience with a Java-centric approach to metacomputing, we have built and used a high-performance widearea Java system, called Manta. Manta implements the Java RMI model u...

In distributed applications, a group of multiple processes is required to be cooperated by exchanging multimedia data. In addition, world-wide distributed applications are being realized by using the Internet. The traditional group communication protocols assume that every pair of processes support almost the same and xed delay time and reliability level. In world-wide multimedia applications, ...

This paper examines how the combined use of hydro governors and a wide-area damping controller (WADC) can improve inter-area oscillations in power systems. Such endanger stability grids, thus them is high priority for transmission system operators (TSO). To ensure that low-frequency decay as fast possible, modal linear quadratic Gaussian (LQG) proposed approach. Using 10-machine New England Tes...

Voltage stability is one of the most important factors in maintaining reliable operation of power systems. When a disturbance occurs in the power system, it usually causes instabilities and sometimes leads to voltage collapse (VC). To avoid such problems, a novel approach called Vector Analysis (VA) is proposed that exploits a new instability detection index to provide wide area voltage stabili...