AffiliationLaboratory of Tree-Ring Research, The University of Arizona, Tucson, Arizona, 85721
KeywordsWater resources development -- Arizona.
Hydrology -- Arizona.
Hydrology -- Southwestern states.
Water resources development -- Southwestern states.
Time series analysis
Analysis of covariance
Principal components analysis
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RightsCopyright ©, where appropriate, is held by the author.
Collection InformationThis article is part of the Hydrology and Water Resources in Arizona and the Southwest collections. Digital access to this material is made possible by the Arizona-Nevada Academy of Science and the University of Arizona Libraries. For more information about items in this collection, contact email@example.com.
PublisherArizona-Nevada Academy of Science
AbstractStatistical analyses of existing hydrologic records suffer from the problem that such records are of relatively short duration, and therefore may not necessarily be random samples of the infinite population of events. On the hypothesis that tree-ring series and runoff series respond to a common climatic signal or signals that permit prediction of annual runoff from annual ring-width index, tree-ring data are used to extend available runoff records backwards in time to permit more accurate estimates of the 3 most common statistics used in hydrology: the mean, the variance and the 1st order correlation. It is assumed that both series are generated by the climatic parameters of precipitation, temperature, evapotranspiration, seasonal regime and spatial distribution. Of major concern in the reconstruction of annual runoff series from tree-ring records was the difference in persistence within each of the 2 series. A matrix of the tree-ring data was constructed, lagged up to 3 times and principal components were extracted. The covariation in this matrix was then decomposed by extracting the Eigen-vectors, and multiple regression was then used to weight the respective series and the differences in persistence were determined. This method was applied to watersheds of diverse characteristics and improved estimates of the mean and variance were obtained.
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Discourse analysis of Retrospective Miscue Analysis sessions: Talking about the reading process with a fourth-grade readerBlack, Wendy Lou (The University of Arizona., 1999)The purpose of this study was to examine the discourse of six selected Retrospective Miscue Analysis (RMA) session transcripts for effective and promising procedures, questions and discussion strategies. Data sources consisted of session transcripts and interviews to determine how the RMA team's discourse accomplished their intended purposes across six RMA sessions with a fourth grade reader. Phases of the analysis included (1) verifying the existing data sets, (2) selecting six RMA sessions from the set of eleven, (3) conducting and analyzing interviews with the RMA team, (4) structural analysis of sessions, (5) speech act analysis of discourse moves, (6) sequential analysis of question cycles, (7) categorization of patterns that emerged in the data. Three broad discourse themes, based on the RMA team's stated purposes for the RMA sessions, guided the categorization of team members' talk: (1) discourse moves providing revaluing, (2) discourse moves providing instruction, and (3) discourse moves encouraging the reader's strategy use. The structural analysis of the RMA sessions generated elements of the instructional sequences and phases that made up each session, and a profile of RMA session procedures. Findings revealed: the RMA team used a wide range of question types to analyze miscues; discourse patterns involved in instruction and revaluing involved a variety of question cycles, position statement and 'you-statements' about the readers' reading strategies; problematic discourse sequences stemmed from problematic questions, responses and belief structures involved in interactions; by analyzing other readers in comparison with his own reading the reader's self-concept increased.
Rapid Capture, Analysis, and Storage of Integrated Circuit Images for Defect AnalysisRippstein, Travis Jonathan; Hudson, Maribel; Nation, Jonathan; Chyan, Frederick; Wiley, Mark (The University of Arizona., 2009-05)
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