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Now showing items 101-110 of 158
Modeling the competitive environment of field crops
(1985)
A model was developed to simulate the growth of individual wheat plants within a field community. Based on hourly observations of irradiance and temperature, one portion of the model (PHOTO) computes the daily photosynthesis, ...
The generalized Fechner-Thurstone direct utility function as an alternative basis for computation of true cost-of-living indexes
(1985)
This dissertation describes an investigation into an alternative approach to the computation of true cost-of-living indexes (TCLIs). Traditionally, computation of TCLIs has involved the estimation of utility function ...
Economic analysis of selected marketing strategies for cotton in the Texas Southern High Plains : a whole-farm simulation approach
(1983)
The marketing of agricultural commodities is a significant determinant in overall farm profitability and/or solvency. No past research has attempted to analyze the relative merits of different marketing strategies for ...
Establishing a consumer indifference function and its estimator for quantity purchases
(1983)
This dissertation documents the development of a pricing scheme which relates unit purchase price to the reliability performance of the items purchased. Stochastic cost models are developed to derive a function, called the ...
Spatial dispersion patterns of house fly larvae, Musca domestica L., and associated predatory mites (Acari : macrochelidae) in poultry manure
(1985)
Third-instar house fly larvae and both sexes of Macrocheles muscaedomesticae exhibit an aggregated spatial dispersion in poultry manure. Populations of both species were sampled by random quadrats of three sizes at a narrow, ...
A study of the interaction of photoperiod and temperature on the biology of the black-margined aphid, Monellia caryella (Fitch)
(1985)
The present study is concerned with the role of photo-period and temperature on the biology of the black-margined aphid. The four principle areas of investigation are duration of life stages, size of individual aphids, ...
Short hedge performance of cotton options
(1986)
Options on cotton futures provide a new risk management strategy for cotton producers. This study examines the performance of options in a short hedging framework. The effects of various option short hedges on net returns ...
Plant cell wall elasticity : a biophysical analysis based upon polymer elasticity
(1986)
The traditional bulk elastic modulus has been demonstrated to be unsuitable for a biophysical analysis of plant cell wall elasticity. Because cell walls consist of a polymer material, this study presents an alternative ...
A reflected kinetics model for nuclear space reactor kinetics and control scoping calculations
(1986)
Renewed interest in space nuclear applications over the past several years has motivated the study of a specialized reactor kinetics model. Long term civilian and dedicated military missions warrant the consideration of a ...
A comparison of several creep constitutive theories for the prediction of elastic-plastic-creep response and their application to finite element analysis
(1986)
This dissertation begins with a review of the bases for creep constitutive equations. Next, physical metallurgical concepts are used to examine the creep process in simple and complex stress histories. Since, there are ...