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A Dictionary of the Kalispel Or Flat-head Indian Language
This rare dictionary was begun by Gregory Mengarini, S.J., in the 1840's.
A Computer Decision-making Process for the Elimination of Noise from Data
Data acquired in many scientific and engineering activities are contaminated by noise or extraneous readings that are superimposed on base-line values. Automated data-analysis routines normally resort to some form of numerical averaging to suppress noise with the assumption that the smoothed values will closely approximate the base data. There are, however, circumstances where averaging may not produce acceptable results such as in situations of serve noise that are biased in magnitude and polarity. The Air Force Geophysics Laboratory was faced with this problem in the analysis of snow weight/rate data because of wind acceptable error boundaries. It was then noted that the base values could ...
Values of Diffusion Coefficients Deduced from the Closing Times of Helicopter-produced Clearings in Fog
Values of diffusion coefficients determined from the observed closing times of nine conical-shaped clearings in fog produced by hovering helicopters at Lewisburg, West Virginia, in September 1969 are presented. The values were established following the method of Elliott, assuming that the geometric and diffusive properties of the clearings and surroundings could be approximated by theoretical equations of the type governing the diffusion of heat and water substance in a bounded, circular cylinder of infinite length, with appropriate specification of the condensation conditions. The diffusion coefficients for the experiments ranged in value from 0.7 to 1.9 x 10 to the 5th power sqcm/sec. Summary diagrams are presented to illustrate how a cylindrical or slot-shaped clearing will close-in with time, dependent on the values of the diffusion coefficient and on the initial temperature and humidity differences between clearing and surrounding.
