IMPACT OF LOCALIZED CUTBACKS IN AGRICULTURAL PRODUCTION ON A STATE ECONOMY

This study examines the effects that a cutback in production by Texas agricultural producers would have on the economic well-being of all producers and consumers in the stateÂ’s economy. To do this, a quadratic input-output model incorporating econometric estimates of final demand was developed for the Texas economy. The output of the agricultural production sectors was constrained to reflect the cutback in production. The results show that agricultural producers would be economically worse off than before only if the producers of raw agricultural products in Texas imported their input needs from other geographical areas.Community/Rural/Urban Development, Production Economics,

Error analysis and corrections to pupil diameter measurements with Langley Research Center's oculometer

Factors that can affect oculometer measurements of pupil diameter are: horizontal (azimuth) and vertical (elevation) viewing angle of the pilot; refraction of the eye and cornea; changes in distance of eye to camera; illumination intensity of light on the eye; and counting sensitivity of scan lines used to measure diameter, and output voltage. To estimate the accuracy of the measurements, an artificial eye was designed and a series of runs performed with the oculometer system. When refraction effects are included, results show that pupil diameter is a parabolic function of the azimuth angle similar to the cosine function predicted by theory: this error can be accounted for by using a correction equation, reducing the error from 6% to 1.5% of the actual diameter. Elevation angle and illumination effects were found to be negligible. The effects of counting sensitivity and output voltage can be calculated directly from system documentation. The overall accuracy of the unmodified system is about 6%. After correcting for the azimuth angle errors, the overall accuracy is approximately 2%

Observations of nucleation-mode particle events and characterization of organic atmospheric particulate matter at a rural New England site

Air quality of New England reflects air quality of the eastern United States and Canada because of transport from these areas to New England. Particle number (PN) concentration, size distribution, and composition were observed in the winter/spring period at a rural New England site (Thompson Farm). Thirteen PN events identified on the basis of increased PN above the site average were investigated, with the majority of events originating from clean northwestern air masses. Steady particle growth rates were observed for events ranging between 0.9 and 5.5 nm. The organic composition of bulk aerosols were also investigated over a year (August 2007 to August 2008), through measurements of organic carbon, elemental carbon, and water-soluble organic carbon (WSOC) from 24-hour samples. Annual means and seasonal trends are reported. 1H-NMR showed little variation among functional groups present in WSOC on a seasonal basis but showed significant variation on a daily basis

Government Policy in Support of Domestic Agriculture: Costs and Benefits, The United States

Agricultural and Food Policy,

Lessons from the XB-70 as applied to the supersonic transport

XB-70 aircraft flight test data as applied to supersonic transport