Topic
Data access
About: Data access is a research topic. Over the lifetime, 13141 publications have been published within this topic receiving 172859 citations. The topic is also known as: Data access.
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Patent•
08 Aug 2002
TL;DR: In this paper, the authors propose a dynamic rules-based secure data access system that may be used in a variety of applications that include a requirement for controlled secure access to a database.
Abstract: The invention provides a dynamic rules-based secure data access system that may be used in a variety of applications that include a requirement for controlled secure access to a database (100). The rules-based access system has several features. One of these is that each user be assigned a role, either as an individual or as part of the group (120). Access rights may be assigned based one roles, but these can be modified within the system by individual users, that have authority to do so. Further, the data resources that each user is allowed to access (130), based on his or her role, and the extent of viewing and of data manipulation allowed, is further controlled based on assigned 'rights and privileges' (210). Another feature is that the database may be viewed as structured and organized into 'business functions', which are useful in business enterprises, such as sales, marketing, customer supports, etc (200). Users may be restricted to only certain functions, based on their roles (160). Within the business function units, the resources may be regarded as are further subdivided into several hierarchy levels; such as business objects, and instances of these objects (190). Users may be allowed access to only a specific business function, and only specific levels within that functional unit, based on role (220). Further, data may be restricted within each of the hierarchy levels, so that a user with access may not be allowed to see or manipulate all resources on a particular level within the hierarchy.
84 citations
TL;DR: Current standards and best practices for the management and publication of biodiversity data are summarized and a minimum standard recommended is that data should be permanently archived in an online, open-access repository with sufficient metadata for potential users to understand how and why they were collected.
84 citations
Patent•
09 May 2008
TL;DR: In this article, a computer readable storage medium comprises executable instructions to establish a trust hierarchy between tenants of a multi-tenant database, and data access rights for the trust hierarchy are specified.
Abstract: A computer readable storage medium comprises executable instructions to establish a trust hierarchy between tenants of a multi-tenant database. Data access rights for the trust hierarchy are specified, the data access rights defined by the tenants of the multi-tenant database. Queries on the multi-tenant database are processed subject to the data access rights for the trust hierarchy.
83 citations
31 Mar 2008
TL;DR: The simulation results show that LAHW successfully increases the effective network usage, which means that the LALW replication strategy can find out a popular file and replicates it to a suitable site.
Abstract: Data grids deal with a huge amount of data regularly. It is a fundamental challenge to ensure efficient accesses to such widely distributed data sets. Creating replicas to a suitable site by data replication strategy can increase the system performance. It shortens the data access time and reduces bandwidth consumption. In this paper, a dynamic data replication mechanism is proposed, which is called Latest Access Largest Weight (LALW). LALW selects a popular file for replication and calculates a suitable number of copies and grid sites for replication. By setting a different weight for each data access record, the importance of each record is differentiated. The data access records in the nearer past have higher weight. It indicates that these records have higher value of references. In other words, the data access records in the long past have lower reference values. A Grid simulator OptorSim is used to evaluate the performance of this dynamic replication strategy. The simulation results show that LAHW successfully increases the effective network usage. It means that the LALW replication strategy can find out a popular file and replicates it to a suitable site.
83 citations
Patent•
14 Sep 2001
TL;DR: In this article, a method and process control data server system architecture for providing process data to a variety of client applications via a plurality of differing data sharing standards is described, and a ready platform for subsequently added client application data exchange protocols.
Abstract: A method and process control data server system architecture are disclosed for providing process data to a variety of client applications via a plurality of differing data sharing standards. The system architecture incorporates a ready platform for subsequently added client application data exchange protocols. In an exemplary embodiment, a set of standard interface definitions between client application data exchange protocol-specific plugins and a data access server engine supports incorporating new client application data exchange protocols by means of plugins designed to interface with the data access server engine according to the standard interface definitions.
83 citations