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The first reported field data on the morphology and ecology and confirmatory cytological data are presented forHymenocallis henryae. Its taxonomic status and possible relationship toH. palmeri are discussed.
The distribution, affinities and delimiting characters and prospects for a new classification ofPiptocarpha are discussed. Two new species and one subspecies from Brazil are described and figured:Piptocarpha densifolia, P. ramboi andP. rotundifolia (Less.) Baker subsp.hatschbachii.
Ames Research Center is engaged in an extensive effort aimed at furthering aircraft navigation technology, and investigating the feasibility of advanced concepts, with emphasis on operations in the terminal area. The principal objective of the present effort was to investigate the performance of an aided inertial system based on a Kalman estimator designed to provide accurate real time estimates of...
Basic nonmathematical principles of scientific inference are exploited to obtain a clearer picture of the common structure of classical estimation theory, decision theory, and modern filter theory. The most elementary hypotheses of scientific inference are examined to set the logical foundations of such concepts as optimality and a priori probabilities. In so doing, the author seeks to demonstrate...
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