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Through analyzing WebGIS and grid, applying MAS and grid to GIS, this paper proposes the dividing frame of WebGIS based on MAS and grid and then makes an in-depth analysis to every part of the frame systematically; at last, the paper proposes the the shared and cooperated application of WebGIS based on MAS and grid.
Interactive multi-user Internet games require frequent state updates between players to accommodate the great demand for reality and interactivity. The large latency and limited bandwidth on the Internet greatly affects the game's scalability. The High Level Architecture (HLA) is the IEEE standard for distributed simulation with its Data Distribution Management (DDM) service group assuming the functionalities...
To solve the resource sharing and real-time interactive problems in collaborative design, we present a prototype system named grid-based collaborative design system (GCDS) integrating both computer supported collaborative design (CSCD) and grid technology which not only maintains data consistency across globally-distributed locations seamlessly, but also allows members of collaborative work team to...
Recently, in line with increased hardware performance, resources for individual PCs have increased. These resources are however, seldom fully utilized, resulting in many free or idle resources. We are currently investigating implementing a full grid on windows PCs using virtual machines. This study aims to utilize idle resources on windows PCs within a Linux grid using virtual machines (virtual grid)...
In this paper, we introduce the concept of Peer-to-peer Learning and discuss learning scenario that we aim at giving solution. We present our contribution ULabGrid2, a Grid architecture framework and the current implementation. ULabGrid2 supports several Peer-to-peer learning scenarios making use of P2P and Grid infrastructures: sharing application session, sharing data files, providing peer to peer...
Grid computing integrates scattered clusters, servers, storages and networks in different geographic locations to form a virtual super-computer. Along with the development of grid computing, dealing with the data distribution requires a method which is faster and more effective for parallel applications in order to reduce data exchange between clusters. In this paper, we present two methods to reduce...
Spatial Data Grid allows for solving larger problems and executing applications that traditional Web GIS (Geographic Information System) can not handle efficiently. The purpose of this paper is to design and implement a new mechanism to organize miscellaneous Vector Map Services, built on GT 4 (Globus Toolkit 4), and based on WSRF (Web Services Resource Framework). In this paper, we illustrate the...
A spatial data access control model in grid environment was proposed base on Globus Security Infrastructure (GSI). Firstly, A spatial datasets sharing framework was built up by Monitor and Discover Service (MDS), and then a common control model was proposed to realize spatial data access control. In this model, every user was mapped to a given role, and every role had a unique digital certificate...
This paper integrates grid technology and OGC compliant services to design and implemented a geospatial Web service platform for the western region's surveying and mapping project. It can make use of OGC common services and interoperability interfaces to supply efficient and secure data management, publishing and inquiries in the heterogeneous computer environment and as well as multi-scale seamless...
As an active aspect in the practice and development of Educational Technology, Education Resource platform is becoming the new growing point. The paper analyzed the problem emerged in current education resource sharing and network, which show a frame Education Resource Grid for Training and Coaching.
The geographic information service (GIS) raises requirements for high performance computation, large-scale spatial database and sharing of other distributed resources in different system. In this paper, we analyze the deficiencies of current application systems and the requirements of GIS. We construct the distributed GIS on grid platform. Considering the flexibility and efficiency, we integrate the...
The traditional Web model can't meet the requirement of file resource management under Internet environment for reasons of Web server bottleneck, resource replication management, resource discovery and network bandwidth problems. Grid technology provides an efficient method for distributed resources management. This paper introduces architecture of educational resources grid (ERG) and analyzes the...
In scientific collaboration platforms such as caGrid, workflow-as-a-service is a useful concept for various reasons, such as easy reuse of workflows, access to remote resources, security concerns, and improved execution performance. We propose a solution for facilitating workflow-as-a-service based on Taverna as the workflow engine and gRAVI as a service wrapping tool. We provide both a generic service...
Grid is an important information infrastructure, its security has a great significance for services providing and reasonable sharing of resources. Safe and effective mechanism of identity authentication, evaluation methods of the entity are most important for the grid users to legitimately utilize resources, raise the legal user's credit rating and shield illegal users. This paper describes the identity...
Resource discovery is a fundamental service of the grid to find out resources suitable for executing user jobs. Traditional resource discovery services of the grid have static structure and centralized or hierarchized, such as Globus MDS. However, with the number of resources composing the grid increased, this approach has two problems, namely, on dynamic changes of the structure in the grid and obtaining...
Service discovery is indispensable to both resource sharing and service integration in the Internet/Grid. In the face of enormous and various services which scatter in the Internet/Grid, the central issue needed to be addressed by a service discovery system is how to quickly shrink the search scope and exactly locate the desired services. Moreover, since simulation experiments are limited in the number...
Leveraging a complex infrastructure such as the computing Grids requires an appropriate level of monitoring. Since it is a technology in development, the current computing Grid middleware offer very little monitoring capabilities from the users' point of view. Making the Grid closer to the users requires that the users have deeper insight of what is happening with the computational jobs they submit...
In Location-Based Services (LBSs), users send location-based queries to LBS servers along with their exact locations, but the location information of the users can be misused by adversaries. For this, a mechanism to deal with the userspsila privacy protection is required. In this paper, we propose a new cloaking algorithm for privacy protection in LBSs. Our cloaking algorithm can support both k-anonymity...
To secure communication in Grids many efforts have been made regarding authentication and authorization. Due to some application requirements it is up to now recommended to open wide port ranges on firewalls. This configuration is commonly accepted as insecure. We present an approach to enhance the security of firewalled Grid components by a new method to dynamically authorize TCP connections on firewalls...
In a file system, critical sections are represented by means of read or write operations on useful data (i.e files) as well as metadata of the system. The processes must be synchronized to reach these shared resources, thanks to mutual exclusion algorithms which guarantee data consistency. In a grid environment, processes are compared to grid nodes and their synchronization is ensured by the sending...
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