Because of their high cost, reducing the number of boards used to fill an
order of dimension parts is an important goal in a lumber rough mill. FLCO
(Fuzzy Logic Cutting Order) is a computer program that achieves this goal.
Using the concepts of fuzzy logic control, FLCO provides a...
The Thurstone-Mosteller and Bradley-Terry Models are commonly used to rank items from paired comparisons experiments in which one item in each pair "wins," and to assess the importance of time-independent explanatory variables on such rankings. The first part of this thesis clarifies the use of probit and logistic regression models...
The current U.S. moratorium on implementation of new Individual Quota (IQ) programs has left fishery managers without an important tool in the quest for successful management systems. Meanwhile, many fisheries, such as the west coast groundfish fishery, are in desperate need of capacity reduction and more flexible management.
The Pacific...
Variable electrical generation (VG) sources such as wind farms are an increasing percentage of total electrical generation in the Bonneville Power Administration (BPA) balancing area and are starting to impact the ability of the regional balancing authority to control the electric grid. Wind farms are not dispatchable and challenge historical...
An experimental study of a passive energy dissipation tension-compression yielding brace or buckling restrained brace has been conducted. The Confined Yielding Damper (CYD) consists of a steel yielding core confined within a tube filled with non-cohesive media. The external tube and confined non-cohesive media provide lateral stability to the core...
Anadromous fish populations in the Pacific Northwest have
undergone substantial change throughout the past century.
Historical periods of over-harvest and the construction of
numerous dams throughout the region have contributed to declines
in the runs of naturally spawning stocks. Management efforts to
rebuild fish populations have focused on the restriction...
Commercial thinning operations can result in damage to residual stems. A literature review revealed that little was known about the effects of residual logging wounds with regard to rotation-age commercial conifers, particularly Douglas-fir. An experiment to examine fungal colonization of Douglas-fir following logging damage showed that while damage was significant...
Alternating-current thin-film electroluminescent (ACTFEL) devices are metal-insulator-semiconductorinsulator-
metal (MISIM) structures which emit light under high field, pulsed excitation. One aspect of ACTFEL operation that is not well understood is the aging of such devices with operating time. One of the primary goals of
this thesis is to characterize the kinetics...
The scientific literature on logging after wildfire is reviewed, with a focus on environmental effects of logging and removal of large woody structure. Rehabilitation, the practice of planting or seeding after logging, is not reviewed here. Several publications are cited that can be described as 'commentaries', intended to help frame...