The optical properties of randomly oriented, spheroidal marine particles are modeled using both numerical and analytical techniques. The optical properties examined are attenuation, scattering, absorption and backscattering. The optical properties are compared to those of equal-volume spheres. The optical properties of very small particles, relative to the wavelength of the...
Visualizing and navigating through a plan is difficult without graphics. Two X applications, PlanView and HViews, are graphical user interfaces to an AI planner, OPIE, developed at the University of Oregon. In addition to a plan generator, OPIE includes a facility to generate operator abstractions which in turn are used...
To be competitive in the development and production of complex electronic systems, a company must constantly scrutinize its manufacturing processes to find ways to reduce costs and increase productivity. One of the more costly problems is the inability to troubleshoot and repair faulty circuit boards on the spot. Rather, they...
A project is described wherein a source code browser was implemented based upon tasks performed by software engineers looking for source code modules with only UNIX utilities. These tasks were discovered by observing the actions of software engineers looking for code modules in a library, The success of the implementation...
QCritic is a rule-based critic for analog bipolar circuits. It functions as a post-processor for the SPICE simulator, making use of netlist, current, and voltage data. The program was written in OPS83, and demonstrates good run-time performance on a VAX 11/780. At present, the system contains rules for analyzing circuits...
In analyses of multivariate data, a classification of the data into related groups is frequently desired. This is generally referred to as the clustering problem. It has been studied in detail and many clustering algorithms exist. Most of these algorithms, however, require experimenting with the actual data before satisfactory results...
This paper describes a Lesson Generating System for CAI, which, by relieving the course author from the burden of programming, provides an efficient means for developing courseware to augment classroom instruction.
A field experiment under irrigation was conducted at the
Hyslop Agronomy Farm, near Corvallis, Oregon, during the 1967
growing season to evaluate the effect of barley row spacing, nitrogen
rate and placement, and weed competition in the year of seeding upon
birdsfoot trefoil (Lotus corniculatus L.) seedling establishment.
The effect...
The influence of variety, plant population, and planting date on
corn silage production was studied at Hyslop Agronomy Farm,
Corvallis, Oregon. The corn plants were grown under irrigation with
300 pounds per acre of 16-20-0 (N-P₂0₅-K₂0) and 240 pounds of urea,
providing a total nitrogen application of 158 pounds per...
The influence of grazing closing dates and form and amount of
nitrogen fertilizer on Gulf annual and Oregon annual ryegrass was
studied at locations in the Willamette Valley of Oregon.
Closing dates were established as mid-April, and May 1 together
with ungrazed plots for comparison. Fertility consisted of a single...