Lagrangean relaxation is presented as a solution
technique to solve flow constrained area-based harvest
scheduling problems. The best set of multipliers in the
Lagrangean approach is obtained through the subgradient
method. Guidelines to set some parameters to compute the
step size in the subgradient algorithm are provided. An
additional procedure...
This dissertation addresses the "multi-machine carryover sequence
dependent group-scheduling problem with anticipatory setups," which arises in
the printed circuit board (PCB) manufacturing. Typically, in PCB manufacturing
different board types requiring similar components are grouped together to
reduce setup times and increase throughput. The challenge is to determine the
sequence of...
Existing forest site maps have been described as "invaluable
tools" in forest management. Their, economic value potentially materializes
as the summed advantage from better decisions in all phases of
forestry.
Via Bayesian decision analysis, this study establishes optimal
use and economic value of site information for one facet of management...
This study considered regional forest policies for sequestering carbon in existing
forests in western Oregon. A model of log markets in western Oregon was employed to
examine the impacts of forest policy changes on future carbon stock, harvests, and
management activities. A carbon tax program, as a mitigation option for...
A parasitic wasp, Trioxys pallidus Haliday
(Hymenoptera: Aphidiidae) was imported from Europe and
initially released against the filbert aphid Mvzocallis
coryli (Goetze) in hazelnut (filbert) orchards of the
Willamette Valley, Oregon beginning in 1984. In the
present study, I investigated the establishment rates of
this parasitoid. A total of 13...
The purpose of this descriptive research was twofold: 1) to
determine the expressed concerns, feelings, and needs of a selected
group of expectant fathers; and 2) to categorize those expressed
concerns, feelings, and needs into broad areas and to develop a
priority listing of those items as a basis for...
One traditional problem in forest management is to
find the optimal stand level management regime. Four
important silvicultural practices including precommercial
thinning, commercial thinning, fertilization and regeneration
harvest are considered jointly in this study. The
partial analyses, i.e. considering some of the silvicultural
practices, are also discussed.
The inability to...
In terms of production forestry, more often than not any species that is not the crop
species is considered a competitor as they are using finite growing resources that would
otherwise be available to the crop species. With specific regard to Douglas-fir
(Pseudotsuga menziesii (Mirb.) Franco) production in the Pacific...
This dissertation consists of three essays that provide comprehensive insights into the complex dynamics shaping entrepreneurial and organizational outcomes. In the first essay I incorporate the Biophilia Hypothesis and the Challenge Hindrance Stressor framework to study entrepreneurial creativity. The findings emphasize the importance of more frequent nature visits for entrepreneurs...