Selective lookup and intercommunication in grid (SLIG) adapting the distributed spanning tree to grid computing

Computing consists of a network of heterogeneous computers, from which a virtual super computer is essentially formed. It displays immense potential as the various resources across large networks can be pooled to service many and be utilized by many, using the Internet from around the world. The potential for parallel CPU processing is one of the most attractive features of a grid. A perfectly scalable application will finish five times faster if it uses five times the number of processors. Application software as required by the users of the grid. Thus, the structure can be represented in layers, as implied by the grouping of grid components. Hardware, the bottom layer, would then contain a large number of heterogeneous resources and would be accessed by a limited number of users to ensure data privacy. The next layer would then consist of application software and tools that are useful for the users and which are domain-specific. In this research we analyzed the distributed and high-performance system in grid computing to provide the efficient resource discovery and message broadcasting. The Distributed Spanning Tree (DST’s) implementation is altered and adapted to achieve better server load and message load distribution by a selective search and look-up mechanism in this proposal. In addition, a fault tolerance mechanism is also expressed in this contribution, as part of the DST’s adaptation, such that if the system which is providing the service fails or leaves the grid environment, then the backup site will immediately take up the execution and recover the task

From the Sun to the Earth: The 13 May 2005 Coronal Mass Ejection

We report the results of a multi-instrument, multi-technique, coordinated study of the solar eruptive event of 13 May 2005. We discuss the resultant Earth-directed (halo) coronal mass ejection (CME), and the effects on the terrestrial space environment and upper Earth atmosphere. The interplanetary CME (ICME) impacted the Earth's magnetosphere and caused the most-intense geomagnetic storm of 2005 with a Disturbed Storm Time (Dst) index reaching -263 nT at its peak. The terrestrial environment responded to the storm on a global scale. We have combined observations and measurements from coronal and interplanetary remote-sensing instruments, interplanetary and near-Earth in-situ measurements, remote-sensing observations and in-situ measurements of the terrestrial magnetosphere and ionosphere, along with coronal and heliospheric modelling. These analyses are used to trace the origin, development, propagation, terrestrial impact, and subsequent consequences of this event to obtain the most comprehensive view of a geo-effective solar eruption to date. This particular event is also part of a NASA-sponsored Living With a Star (LWS) study and an on-going US NSF-sponsored Solar, Heliospheric, and INterplanetary Environment (SHINE) community investigation. © 2010 The Author(s)