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In recent years different institutions have launched several telemedicine projects which aimed to encourage the Euro-Mediterranean co-operation. The creation of a Virtual Euro-Mediterranean Hospital aiming to facilitate the interconnection of the various services through real integration has been recommended. Therefore Grid becomes inevitable for successful deployment of these services. Existing Grid...
Grid technology is widely emerging as a solution for wide-spread applicability of computerized analysis and processing procedures in biomedical sciences. In this paper we show how a cardiac image analysis task can substantially benefit from Grids, making use of a middleware service tailored to the needs of common application tasks. In a first part we describe a methodology for the construction of...
The implementation of GEMS, a Grid-based molecular simulator, on the EGEE Grid environment is presented. We discuss the main issues related to the porting of the application on the EGEE Grid platform and the creation of the VO CompChem for the community of Computational Chemists. The real-time visualization of some reaction’s magnitudes on Virtual Monitors is also discussed.
Within the frame of the OpenMolGRID project, several extensions to the underlying UNICORE Grid infrastructure have been developed. This article gives an overview of these developments, focussing on the support for complex scientific workflows and a newly developed command line client for UNICORE.
The study and validation of the ATLAS Computing Model started three years ago and will continue for few years in the context of the so-called Data Challenges (DC). DC1 was conducted during 2002-03; the main goals achieved were to set up the simulation data production infrastructure in a real worldwide collaborative effort and to gain experience in exercising an ATLAS wide production model. DC2 (from...
For many remote sensing application projects, the quality of the research or the product is heavily dependent upon the quantity of computing cycles available. Middleware is software that connects two or more otherwise separate applications across the Internet or local area networks. In this paper, we present the High Throughput Computing Spatial Information Processing (HIT-SIP) System (Prototype),...
Grid software often unfortunately requires significant changes in existing infrastructure, both in terms of policy and mechanism, instead of accommodating and leveraging existing information servers such as enterprise LDAP servers and enterprise authentication infrastructures. The University of Virginia Campus Grid (UVaCG) has been designed explicitly to re-use as much existing infrastructure in the...
There are many potential users and uses for grid computing. However, the concept of sharing computing resources excites security concerns and, whilst being powerful and flexible, at least for novices, existing systems are complex to install and use. Together these represent a significant barrier to potential users who are interested to see what grid computing can do. This paper describes M-grid, a...
The promise of the grid is that it will enable public access and sharing of immense amounts of computational and data resources among dynamic coalitions of individuals and institutions. However, the current grid solutions make several limiting assumptions that curtail their widespread adoption in the emerging decentralized, resource constrained, embedded, autonomic, and mobile (DREAM) environments:...
We describe the idea of a Science Gateway, an application-specific task wrapped as a web service, and some examples of these that are being implemented on the US TeraGrid cyberinfrastructure. We also describe HotGrid, a means of providing simple, immediate access to the Grid through one of these gateways, which we hope will broaden the use of the Grid, drawing in a wide community of users. The secondary...
This paper examines the availability of grid infrastructures, describes the principles of transactional grid deployment, outlines the design and implementation of a transactional deployment system for the Grid-Ireland national grid infrastructure based on these principles, and estimates the resulting availability.
The International Testbed of the CrossGrid Project has been in operation for the last three years, including 16 sites in 9 countries across Europe. The main achievements in installation and operation are described, and also the substantial experience gained on providing support to application and middleware developers in the project. Results are presented showing the availability of a realistic Grid...
Grid computing has been presented as a way of sharing geographically and organizationally distributed resources and of performing successfully distributed computation. To achieve these goals a software layer is necessary to interact with grid environments. Therefore, not only a middleware and its services are needed, but it is also necessary to offer resource management services to hide the underlying...
The emergence of Grid computing has accentuated the need of an adaptable, scalable and extensible resource management system. In this paper we introduce GridARM system which renders the boundaries of resource brokerage, virtual organization wide authorization and advanced reservation, and represents a scalable and adaptive Grid resource management as a middleware infrastructure. The GridARM system...
As deployed Grids increase from tens to thousands of nodes, Peer-to-Peer (P2P) techniques and protocols can be used to implement scalable services and applications. The super-peer model is a novel approach that helps the convergence of P2P models and Grid environments and can be used to deploy a P2P information service in Grids. A super-peer serves a single Virtual Organization (VO) in a Grid, and...
This paper proposes a framework for advanced Grid resource discovery and monitoring. In the framework, a service’s state data are mapped into ontologies so that service owners may enrich them with semantic and other useful data, while keeping the state data unchanged. The Index Service, based on the OGSA framework, aggregates and maintains the ontology data, and allows users to query the data by using...
The Virtual Laboratory for e-Science seeks to provide users with a collaborative environment in which they will be able to work together across time and space while using Grid technology. In this paper we will define the requirements for collaboration in the VL-e. An in depth study of the Userlist, Instant Messenger and Telepointer has been done and a Grid Service based architecture has been designed...
Self-organized overlay is widely used in Peer-to-peer (P2P) networks for its scalability, adaptability, and fault-tolerance in large and dynamic environments. In this paper, we propose a fully decentralized approach, DGSD(Decentralized Grid Service Discovery) for Grid service discovery. DGSD makes use of the underlying P2P overlay network protocols to self-organize nodes and services in the Grid....
In a grid environment, it is of primary concern to make efficient use of the resources that are available at run-time. If new computational resources become available, then requests shall also be sent to these newly added resources in order to balance the overall load in the system. However, scheduling of requests in a service grid considers each single service invocation in isolation and determines...
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