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• W34807713 abstract "Science has evolved over the past several decades, from an empirical and theoretical approach to one that includes computational simulations and modeling, commonly known as e-Science. Advances in cyberinfrastructure for e-Science have enabled researchers to run complex, computational investigations that include data access, analysis, and model runs that execute, largely automated, as data-driven workflows. Provenance is metadata that describes the process by which datasets are generated by the workflows. This data derivation history is essential to understand how a datum was created, verify and validate the experimental results, and determine the quality of the derived data. This dissertation makes two key contributions to scientific data management. First, it proposes a low-overhead provenance collection framework for scientific workflows. The Karma Provenance Framework is a prototype implementation that collects provenance activities from automatically instrumented services and builds a data provenance model from runtime information. Karma provides a service interface to query for different forms of provenance. The framework has been applied in the LEAD cyberinfrastructure and its performance validated through empirical analysis. Second, it defines a data quality model for estimating the subjective quality of derived data for scientific applications. The model uses a holistic set of quality metrics, including provenance, intrinsic metadata, quality of service, and community perception, to estimate a numerical quality score for the data. This enables a scientist to select the best quality dataset for their application from numerous that qualify. Experimental studies conducted on a prototype quality broker validate the feasibility and prediction accuracy of the model." @default.
• W34807713 created "2016-06-24" @default.
• W34807713 creator A5041794289 @default.
• W34807713 creator A5049801956 @default.
• W34807713 creator A5084770333 @default.
• W34807713 date "2007-01-01" @default.
• W34807713 modified "2023-09-23" @default.
• W34807713 title "Provenance framework in support of data quality estimation" @default.
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