In this thesis we introduce alpha and beta tree acceptors,
generalizations of tree automata. The alpha tree acceptors recognize
a tree by final symbol and the beta tree acceptors by final state. We
show that alpha and beta tree acceptors recognize the same sets of
Gorn trees and demonstrate that...
The story of Leo Szilard has not been told in its full complexity. This is especially so of the role imagination played in Szilard’s worldview. Szilard, like many other scientists in the mid-twentieth century, worked on the Manhattan Project. Like these other wartime participants, the work and relationships formed during...
Soil pore size distribution and water characteristics are important for water storage, water movement, and soil-plant interaction studies. Laboratory determinations of water characteristics and pore size distribution are time consuming and costly. Investigators have proposed many models to predict them from routinely available data. Most of the models are related...
Published March 1997. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Ocean waves propagating over cohesionless seabed deposits
produce cyclic shear stresses within the deposit. Under certain
conditions these stresses may cause a progressive build-up of pore
pressure. Pore pressure accumulation can result in liquefaction or
a substantial decrease in the effective stress with attendant large
deformations of the seabed deposit....
The regulation of ergosterol biosynthesis in yeast has been
studied. The system has been examined for the presence of an end-product inhibition. Both anaerobically and aerobically grown cells
have been examined for this effect. A feedback inhibition of sterol
synthesis has been shown, but it appears to be a secondary...
Director David Fincher’s films contain many distinct elements that set his work apart, but one of the most instantly recognizable elements is his visual style – specifically, his camerawork. The level of control and purposefulness that Fincher exhibits in his films qualify Fincher as the auteur, or “author,” of his...
Low completion rates have created serious "leakage points" (Astin, 1988) and "severe hemorrhaging" (Lango, 1996) in higher education to a large number of Hispanics. Traditional research on college persistence, which has blamed the students' culture for low performance, is inaccurate. Little research has specifically investigated academic persistence from a cultural...
A prototype deep ocean nuclear moisture meter was developed
based on the detection of epithermal neutrons backscattered from
marine sediment molecules. Development consisted of choosing a
source, a detector, containment materials, and associated counting
equipment, followed by the construction and calibration of the probe.
Thermal neutron response of the probe...
PURPOSE OF THE STUDY
This study developed a model which identified mathematical needs
in various vocational technical programs. This model provides a
method which can be used to develop an adequate mathematics curriculum
to support occupational offerings at community college/technical
institutes, and can also help high schools and the colleges/technical...
Published January 1973. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
The terminal reactions in the biosynthetic pathway of methionine
in Saccharomyces cerevisiae were investigated in this study. Analyses
of a number of methionine auxotrophs for biochemical deficiences
established four mutant groups. It was observed from qualitative feeding
experiments that some auxotrophs were able to utilize S-adenosylmethionine
(AM) and S-adenosyl-homocysteine (AH)...
A pharmacognostic study was made of the root of Heracleum
mantegazzianum, an umbelliferous species which is of value as a
source of natural coumarins.
Three groups of seeds were tested to determine the presence
of a germination requirement for moist cold and the possible value
of gibberellic acid in obviating...