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Lu, Kun – ProQuest LLC, 2012
The performance of information retrieval systems varies significantly by test topics. Even for those systems that have performed well on average, the results for some difficult topics are still poor. Previous studies have revealed that different optimization techniques should be used for those difficult topics. However, a prerequisite of the…
Descriptors: Information Retrieval, Information Systems, Difficulty Level, Predictor Variables
Brimhall, Jack C. – ProQuest LLC, 2010
The research problem addressed in this study was the lack of trust between faculty-principal, faculty-client, and faculty-colleague in U.S. secondary schools. The purpose of the study was to determine the relationship between communicator styles and perceptions of trust. Organizational trust theory served as the theoretical foundation. A…
Descriptors: Research Problems, Research Design, Trust (Psychology), Social Change