Statistical aspects of setting a sampling strategy

Historical information about the variation of the indicator bacteria in a System can be used to help in setting a sampling strategy for future data collection. It is commonly recommended that the water System be divided into zones with the locations within a given zone being more similar to each other than the locations from different zones. A number of samples are then taken at random from each zone. This paper presents a method for estimating the gain in the precision by dividing the water system into zones. Furthermore, a technique is given for estimating the total number of samples required for the water system. This technique is based on the hypothesis testing concept. Two illustrative examples conclude the paper

Final Report of the Haystack Orbital Debris Data Review Panel

Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) Program Office plays a key part in helping NASA maintain this important role. The NASA STI Program Office is operated by Langley Research Center, the lead center for NASA’s scientific and technical information. The NASA STI Program Office provides access to the NASA STI Database, the largest collection of aeronautical and space science STI in the world. The Program Office is also NASA’s institutional mechanism for disseminating the results of its research and development activities. These results are published by NASA in the NASA STI Report Series, which includes the following report types: • TECHNICAL PUBLICATION. Reports of completed research or a major significant phase of research that present the results of NASA programs and include extensive data or theoretical analysis. Includes compilations of significant scientific and technical data and information deemed to be of continuing reference value. NASA’s counterpart of peer-reviewed formal professional papers but has less stringent limitations on manuscript length and extent of graphic presentations. • TECHNICAL MEMORANDUM. Scientific and technical findings that are preliminary or of specialized interest, e.g., quick release reports, working papers, and bibliographies that contain minimal annotation. Does not contain extensive analysis

ASME Paper No. 74-FE-28. 6 Chung, K. C, "The Momentum Integral Solution of the Developing Flow in the Entrance of an Annulus with a Rotating Inner Cylinder

Previously published inception data for cavitation in the wake of sharp-edged disks are reanalyzed. The boundary layer characteristics at the face of the disk are found to play a major role. Good correlation between theory and experiment is achieved when the boundary layer is laminar