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14 results on '"Ash D"'

4. Measurement of wave propagation in a weakly inhomogeneous medium-the sea.

Author

Brownlee, L. R., Sagar, F. H., and Ash, D. E.

Abstract

An account is given of measurements of amplitude fluctuations for sound transmitted over a fixed off-shore multiple-transducer range from projectors radiating in turn at the two frequencies: 35 and 65 kHz. The observed fluctuations are found to saturate with range even though their values are small for all of the ranges employed. This effect is explained in terms of a truncation concept which is found to apply not only to the results reported here but also to the previously published measurements of other workers. [ABSTRACT FROM AUTHOR]

Published
1974
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6. Neonatal Hematocolpos

Author

Ash, D. G. G. and Smith, I. McD.

Subjects
Diagnosis, Vagina, Infant, Newborn, Hematocolpos, Humans, Infant, Female, Case Reports, Infant, Newborn, Diseases, Congenital Abnormalities
Published
1965

7. On the Statistical Analysis of Air Pollution Data.

Author

PRINCETON UNIV N J DEPT OF STATISTICS, Ash,D., Bloomfield,P., McNeil,D. R., PRINCETON UNIV N J DEPT OF STATISTICS, Ash,D., Bloomfield,P., and McNeil,D. R.

Abstract

Some preliminary results are presented concenrning the distribution of air pollutant concentrations in New Jersey. The data, consist of multiple time series, sampled at 15 minute intervals and collected into hourly averages, for up to ten pollutants at twenty one locations throughout the state. The period covered covers the calendar years 1970 and 1971. The data shows daily and seasonal variation, and residual noise. Standard techniques of data analysis are used, including the fitting of parametric time series models. The question of the distribution of pollutant concentration, often thought to be of the lognormal form, is also examined. It is found that a fourth-root transformation does better than logging for sulfur dioxide and carbon monoxide levels. (Author)

Published
1972

14. NEONATAL HEMATOCOLPOS.

Author

ASH DG and SMITH IM

Subjects
Female, Humans, Infant, Infant, Newborn, Congenital Abnormalities, Diagnosis, Hematocolpos, Infant, Newborn, Diseases, Vagina
Published
1965

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