Now showing items 1-5 of 5
Thinning even-aged Douglas-fir stands: effects of density and structure on stand volume growth
The usefulness of thinning studies in Douglas-fir stands has been limited by difficulties such as the long time period required, changing study objectives, and the limited scope of these studies. An approach is presented where two baseline models--based on volume estimates for unthinned stands from two Douglas-fir growth and ...
A revised sociology of leisure: the social relationships and network structures of leisure behaviors
Conventional wisdom in the sociology of leisure maintains that "leisure" is what people experience as a result of recreation participation. Missing from our understanding of leisure as a socially significant phenomena is knowledge of how people construct leisure behaviors and meanings within the social context of their daily ...
The Cascade red fox: distribution, morphology, zoogeoraphy and ecology
The indigenous Cascade red fox, Vulpes vulpes cascadensis, occupies the subalpine meadows and parklands near the Crest of the Cascade Mountains and the open forests on the eastern slope of the Cascades; they do not occur in the densely-forested habitats on the western slope. Red foxes from the eastern U.S. were brought into ...
Biology and conservation of the endangered Hawaiian Dark-rumped Petrel (Pterodroma phaeopygia sandwichensis)
The Hawaiian Dark-rumped Petrel or 'Ua'u is an endangered gadfly petrel that nests in the Hawaiian Islands and ranges throughout the central Pacific. The species was once common in Hawaii, with large colonies located on all the main islands, but its numbers have recently been reduced to several small relictual populations. ...
A dynamic programming approach to optimizing stem conversion
The process of converting trees into roundwood logs is the first in a series of manufacturing steps that ultimately leads to a finished product such as plywood, lumber, or paper. Since each manufacturing step is dependent on previous actions, potential profits can be lost if trees are miscut. The decision problem facing the ...