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Knowing which parts of a system underwent which types of refactoring between two program versions can help programmers better understand code changes. Though there are a number of techniques that automatically find refactorings from two input program versions, these techniques are inadequate in terms of coverage by handling only a subset of refactoring(More)
BACKGROUND Numerous studies have reported associations between fine particulate and sulfur oxide air pollution and human mortality. Yet there continues to be concern that public policy efforts to improve air quality may not produce actual improvement in human health. OBJECTIVES This study retrospectively explored a natural experiment associated with a(More)
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