The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Grid is a collection of distributed computing resources that performs tasks in co-ordination to achieve high-end computational capabilities by dividing a given task into sub-tasks. Each sub-task could be large and run for several hours or days on a number of grid nodes. If a sub-task fails to complete even on a single site, all the computations should be performed again. In scalable distributed systems,...
The task of a network monitoring of the grid is to collect the scattered network information between the nodes of the grid, and provide an overall network status of the grid at any instant of time. The architecture of the monitoring system is based on the relational grid monitoring architecture, which provides a relational approach for the producer-consumer model of the GMA. This monitoring architecture...
Current intrusion detection technology is limited in providing protection against the intrusions that may violate the security of computational grids. We present the problem of grid intrusion detection, describe the requirements of a system to detect them, propose a grid intrusion detection method, and show how it overcomes the limitations by integrating the detection of the typical host computer...
Transaction scheduling models and control issues are two important problems in a distributed environment. A lot of research has been focused on the problems recently, and many models and measures (such as replication) have been proposed. However, some of them didn't fit for grid environment, as grid architecture is a new and distinguished from conventional distributed computing by its heterogeneous,...
In the framework of meaning representation in Natural Language Processing (NLP), we aim to develop a system that can be used for heterogeneous applications such as Machine Translation, Information Retrieval or Lexical Access. This system is based on six hypotheses which concern meaning representation and acquisition. In this paper, we discuss the related hypotheses that motivate the construction of...
This paper presents a new extension to a semantic grid resource monitoring and discovery system called S-MDS[1]. The extension requires S-MDS to store a sequence of resource property values into an RDF database so that aggregate and statistical calculation can be performed over the values. By using a rule-based approach combined with the inference capability of the RDF database, S-MDS provides a novel...
Virtual screening has become an important part of the drug discovery process. Grid computing facilitates this process by providing shared computational resources across different international institutions to run computationally intensive, scientific applications without the need for a centralized supercomputer. This study designed and implemented a flexible, scalable platform to perform a large virtual...
This paper compares and contrasts authentication mechanisms used in three VO architectures: the first reflects ad-hoc connections among several organizations, the second uses a centrally managed database and the third is based on public key infrastructure (PKI). The reason for studying these particular three architectures is that they cover a large class of currently operating VOs (i.e. supply chains,...
The existing scheme for result verification in a distributed grid system is replication. This scheme suffers from collusion and redundant execution of the jobs leading to high resource consumption. In order to combat these issues, a scheme called quizzing is proposed in the three-tier grid architecture. Some tasks of given jobs itself are given as quiz queries instead of separate set of quiz queries...
This paper proposes a realistic data grid system named JobGrid to construct information platform for Chinese college graduates employment, which supports centralized transaction processing to ensure consistent, effective operation in data access, control, monitor and analysis, and distributed data management to provide heterogeneous data integration, conversion, exaction and export. JobGrid has implemented...
Computer architecture simulation and modeling require a huge amount of time and resources, not only for the simulation itself but also regarding the configuration and submission procedures. A quite common simulation toolset (SimpleScalar) has been used to model a variety of platforms ranging from simple unpipelined processors to detailed dynamically scheduled microarchitectures with multiple-level...
Grid is an emerging technology that aims at utilizing resources efficiently and effectively. The proposed robust three-tier architecture ensures trustworthy resource selection in a grid environment. This architecture is secured by using spam filtering mechanisms and by incorporating spamicity of a node in the computation of its trust value. For this purpose, a network of Anomaly Detection Agents (ADA)...
Bioinformatics tools used for efficient and computationally intensive analysis of genetic sequences require large-scale computational resources to accommodate the growing data. Grid computational resources such as the Open Science Grid and TeraGrid have proved useful for scientific discovery. The genome analysis and database update system (GADU) is a high-throughput computational system developed...
The UNICORE grid system provides a seamless, secure and intuitive access to distributed grid resources. In recent years, UNICORE 5 is used as a well-tested grid middleware system in production grids (e.g. DEISA, D-Grid) and at many supercomputer centers world-wide. Beyond this production usage, UNICORE serves as a solid basis in many European and International research projects and business scenarios...
In this paper an analytical comparison of the performance behavior of parallel flavors of the well-known Binary Merge Sort and Bitonic Sort algorithm in a grid environment is presented. To keep the analysis clear and focused we concentrate on a limited number of characteristic parameters and develop a concise but comprehensive analytical model both for a generalized multiprocessor framework and a...
In the biodiversity world (BDW) project we have created a flexible and extensible Web services-based grid environment for biodiversity researchers to solve problems in biodiversity and analyse biodiversity patterns. In this environment, heterogeneous and globally distributed biodiversity-related resources such as data sets and analytical tools are made available to be accessed and assembled by users...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.