A theory of higher order connections is developed as
a reduction of the structure group of the jet bundle of
sections of a smooth vector bundle. This definition leads
naturally to higher order curvatures and covariant derivatives.
Curvature Conditions for a second order partial differential
operator to have constant coefficients...
The organic content of the Columbia River suspended particulate matter (SPM) results from the input of autochthonous (phytoplankton) and allochthonous (terrestrial vascular plants) production. The contribution of these two sources appears seasonal and responds to factors such as rainfall, runoff, river flow, light and nutrients availability. While numerous studies have...
Conceptually, the dynamics of wood in streams can be viewed in terms of input and in-channel processes. Input processes are associated with both the riparian (tree fall, bank cutting, windthrow) and upslope forests (mass failures). In-channel processes include log breakage, movement, and decomposition. A mechanistic view of these processes is...
Responses of juvenile steelhead trout to changes in stream habitat resulting from an instream habitat rehabilitation project in Meadow Creek, Oregon were measured from 1991 through 1992 and compared to pre-treatment data from 1987 through 1990. Sixty nine pool-forming, and 59 channel-stabilizing log structures were constructed by the U.S. Forest...
The middle Deschutes River between Bend, Oregon and Lake Billy Chinook typically experiences critically low flows during the irrigation season. Commercial agriculture in the North Unit Irrigation District and Central Oregon Irrigation District is one major user of Deschutes River water. The overall objective of this research was to estimate...
Human beings are condemned to freedom, according to Jean-Paul Sartre's Being and Nothingness. Every individual creates his or her own identity according to choice. Because we choose ourselves, each individual is also completely responsible for his or her actions. This responsibility causes anguish that leads human beings to avoid their...
A three-part study was conducted into the impact of physiological and ecological variables on the net isotopic fractionation of hydrogen, α[subscript K₃₇], expressed in C₃₇ alkenones. First, alkenone-producer production, abundance, and export were characterized in the summertime Gulf of California and Eastern Tropical North Pacific using compound-specific, labeled in situ...
The effects of suckling on several ovarian characteristics were
studied in postpartum rabbits. Ovarian weight was found to be significantly
greater in rabbits suckled for twelve days than in nonsuckled
rabbits autopsied at a similar interval postpartum or in a third group
autopsied at parturition. There were no significant differences...