The design of a research water table

A complete design for a research water table is presented. Following a brief discussion of the analogy between water and compressible-gas flows (hydraulic analogy), the components of the water table and their function are described. The major design considerations are discussed, and the final design is presented

Inflation as a Probe of Short Distance Physics

We show that a string-inspired Planck scale modification of general relativity can have observable cosmological effects. Specifically, we present a complete analysis of the inflationary perturbation spectrum produced by a phenomenological Lagrangian that has a standard form on large scales but incorporates a string-inspired short distance cutoff, and find a deviation from the standard result. We use the de Sitter calculation as the basis of a qualitative analysis of other inflationary backgrounds, arguing that in these cases the cutoff could have a more pronounced effect, changing the shape of the spectrum. Moreover, the computational approach developed here can be used to provide unambiguous calculations of the perturbation spectrum in other heuristic models that modify trans-Planckian physics and thereby determine their impact on the inflationary perturbation spectrum. Finally, we argue that this model may provide an exception to constraints, recently proposed by Tanaka and Starobinsky, on the ability of Planck-scale physics to modify the cosmological spectrum.Comment: revtex, 8 pages, eps figures included, references adde

Flow visualization experiments in a porous nozzle

An experimental approach is described for the study of nozzle flows with large wall-transpiration rates. Emphasizing a qualitative understanding of the flow, the technique uses the hydraulic analogy, whereby a compressible gas flow is simulated by a water flow having a free surface. For simplicity, the simulated gas flow is taken to be two-dimensional. A nozzle with porous walls in the throat region has been developed for use on a water table. A technique for visualizing the transpired fluid has also been devised. These are discussed, and preliminary results are presented which illustrate the success of the experimental approach

EXPERIMENTAL PANEL FLUTTER RESULTS FOR SOME FLAT AND CURVED TITANIUM SKIN PANELS AT SUPERSONIC SPEEDS

Panel flutter results for flat and curved titanium skin panels at supersonic spee

Alien Registration- Kinney, Harold R. (Lubec, Washington County)

https://digitalmaine.com/alien_docs/2126/thumbnail.jp

An Investigation of Parental and Teacher Attitudes Toward Appropriate Activities for Kindergarten

Children\u27s adjustment to kindergarten is an issue which is of concern to both educators and parents. This study explores three areas which were thought to have a relationship to children\u27s adjustment to school: parents\u27 attitudes toward appropriate activities for preschoolers and kindergarteners; how these attitudes compare between groups of parents based on the preschool that their children attended; and parents\u27 perceptions of continuity between their child\u27s preschool and kindergarten programs. Of particular interest in this study was the relationship between Westside Community School\u27s Early Childhood programs and its kindergartens

Discussant\u27s response to Using regression analysis to assist audit judgments in substantive testing

https://egrove.olemiss.edu/dl_proceedings/1089/thumbnail.jp