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We have implemented and deployed an access control mechanism that uses digitally-signed certificates to define and enforce an access policy for a set of distributed resources that have multiple, independent and geographically dispersed stakeholders. The stakeholders assert their access requirements in use-condition certificates and designate those trusted(More)
—Cloud computing has seen tremendous growth, particularly for commercial web applications. The on-demand, pay-as-you-go model creates a flexible and cost-effective means to access compute resources. For these reasons, the scientific computing community has shown increasing interest in exploring cloud computing. However, the underlying implementation and(More)
The impact of Web service integration on grid performance p. 14 Supporting application-tailored grid file system sessions with WSRF-based services p. 24 Building self-adapting services using service-specific knowledge p. 34 Increasing application performance in virtual environments through run-time inference and adaptation p. 47 Enabling self-management of(More)
The combination of low-cost sensors, low-cost commodity computing, and the Internet is enabling a new era of data-intensive science. The dramatic increase in this data availability has created a new challenge for scientists: how to process the data. Scientists today are envisioning scientific computations on large scale data but are having difficulty(More)
The Grid2003 Project has deployed a multi-virtual organization, application-driven grid laboratory (" Grid3 ") that has sustained for several months the production-level services required by physics experiments of the Large Hadron Collider at CERN (ATLAS and CMS), the Sloan Digital Sky Survey project, the gravitational wave search experiment LIGO, the BTeV(More)
Invited Paper Securing a Grid environment presents a distinctive set of challenges. This paper groups the activities that need to be secured into four categories: naming and authentication; secure communication ; trust, policy, and authorization; and enforcement of access control. It examines the current state of the art in securing these activities and(More)
Today, our picture of the Universe radically differs from that of just over a decade ago. We now know that the Universe is not only expanding as Hubble discovered in 1929, but that the rate of expansion is accelerating, propelled by mysterious new physics dubbed "Dark Energy." This revolutionary discovery was made by comparing the brightness of nearby Type(More)
Cloud computing has evolved in the commercial space to support highly asynchronous web 2.0 applications. Scientific computing has traditionally been supported by centralized federally funded supercomputing centers and grid resources with a focus on bulk-synchronous compute and data-intensive applications. The scientific computing community has shown(More)
Developing high-performance problem solving environments/applications that allow scientists to easily harness the power of the emerging national-scale " Grid " infrastructure is currently a difficult task. Although many of the necessary low-level services, e.g. security, resource discovery, remote access to compute/data resource, etc., are available, it can(More)