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3 results on '"Denny H. Meyer"'

1. Testing for the significance of changes in television ratings

Author

Denny H. Meyer

Subjects
Management. Industrial management, HD28-70, Business, HF5001-6182
Abstract

South African television ratings are obtained from the AMPS meter panel. This panel must be viewed as a complex non random sample. For such samples the effective sample size differs from the actual sample size. It has been found that, when equal weights are assigned to strata, the most reliable estimate for effective sample size can be obtained by considering every household as a sample cluster. This estimate of effective sample size can be incorporated directly into a test for significant rating change. For convenience this test is implemented graphically.

Published
1990
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2. Testing for significant changes in popularity

Author

Denny H. Meyer

Subjects
Management. Industrial management, HD28-70, Business, HF5001-6182
Abstract

A graphic procedure for determining whether a statistically significant change in television ratings has occurred is proposed. The method takes into account the fact that the ratings are generated from the same sample of viewers rather than from two independent samples. In addition it incorporates the effect of sample size. The method is applicable for the analysis of all market research data collected by such panel methods.

Published
1988
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3. An FTIR study of the induction and release of kiwifruit buds from dormancy

Author

Murray J, Judd, Denny H, Meyer, John S, Meekings, Annette C, Richardson, and Eric F, Walton

Subjects
Sucrose, Actinidia, Meristem, Temperature, Reproducibility of Results, Pilot Projects, Flowers, Soil, Plant Growth Regulators, Hydrogen Cyanide, Multivariate Analysis, Spectroscopy, Fourier Transform Infrared, Linear Models, Carbohydrate Metabolism, Pectins, Seasons, Cellulose
Abstract

Many deciduous, perennial fruit crops require winter chilling for adequate budbreak and flowering. Recent research has shown that changes in sugar and amino acid profiles are associated with the release of buds from dormancy. This paper uses FTIR spectrometry to provide an alternative mechanism for tracking metabolic changes in the meristems of kiwifruit buds during winter dormancy. The results suggest that the application of multivariate analysis to FTIR spectra has the potential to be a reliable and fast method for detecting structural and compositional changes in fruit crops.Ten wave numbers of the FTIR spectra are used to calculate a bud development function. This function has been validated using data from two seasons and four orchards, and by monitoring the effects of hydrogen cyanamide application, sugar concentrations and soil temperatures on this function. These wave numbers appear to be associated with carbohydrate, pectin and cellulose levels in the meristems.It is expected that this FTIR signature can be used to advance our understanding of the influence of the various environmental and physiological factors on the breaking of bud dormancy and shoot outgrowth, including the optimum timing and concentrations of applications of budbreak regulators, such as hydrogen cyanamide.

Published
2010

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