The main objective of this thesis was to determine the influence of tree vigor on susceptibility to Armillaria root disease. First, the effect of thinning, fertilizing
and pruning on tree vigor of four young Douglas-fir (Pseudo tsuga menziesii var.
menziesi,) plantations was explored. Tree vigor was calculated by measuring wood...
The main focus of this work is on the problem of existence of nonlinear optimal controllers
realizable by artificial neural networks. Theoretical justification, currently
available for control applications of neural networks, is rather limited. For example,
it is unclear which neural architectures are capable of performing which control
This research was conducted as part of the Strategic Highway Research Program (SHRP)
A-003A contract at Oregon State University to validate the findings of SHRP contracts
A-002A and A-003B with regard to aging of asphalt-aggregate mixtures. One short-term
and four long-term aging methods were used to simulate aging of asphalt-aggregate...
Nisin is an antibacterial peptide, which when adsorbed
on a surface can inhibit bacterial adhesion and viability.
The ability of noncovalently immobilized nisin to withstand
exchange by the milk proteins bovine serum albumin, β-lactoglobulin, α-lactalbumin, and β-casein on surfaces that
had been silanized with dichlorodiethylsilane to exhibit
high and low...
Diode lasers have many advantages such as small size, high efficiency and small
angular dispersion of the collimated beam. However they also have some problems like
lack of frequency stability. They can not be tuned in wavelength. An external cavity can
solve these problems and decrease the laser linewidth.
The objectives of this research were to 1) evaluate the establishment and peak
standing crop of Berber Orchardgrass (Dactylis glomerata var. "Berber"), Palestine
Orchardgrass (Dactylis glomerata var. "Palestine"), and Sheep Fescue (Festuca ovina
var. "Covar") ; 2) to assess establishment and production changes resulting from
environmental gradients (elevation, slope, aspect,...