Online courses and even degree programs are becoming a widespread phenomenon at universities across the United States. Research into the effectiveness of these courses is in the early stages. This qualitative study explored student perceptions of their online class experience using expectancy-value theory as a framework in an attempt to...
Old-growth forests provide an important resource in terms of both
timber and non-timber values. Northwest Oregon represents an area
where this resource is scarce and options for preserving old-growth
habitat are limited. This study identifies the old-growth resource on
public lands within the area, suggests a range of preservation
alternatives...
Using historical maps and tools provided by GJS, the spatial patterns of
pre-logging forest conditions were quantified for three landscapes in western
Oregon. The spatial coincidence between forest patches and topographic
features was determined for slope gradient, aspect, elevation, and distance
from streams. Pre-logging and current forest compositions were compared....
The purpose of this study was to discern unpredicted, non-linear patterns that may emerge in complex instructional systems design projects. A secondary purpose was to determine how existing models could be redesigned to accommodate emerging factors. The following questions focused the inquiry:
1. In what ways does the actual ISD...
Marine and freshwater food webs are strongly structured by size-dependent predator−prey interactions. Predator−prey body mass ratios (PPMR) are important parameters in size-based food-web models, but studies evaluating the temporal stability of PPMR or its relationship to predator feeding modes are scant. Using a large data set of predator−prey pairs from...
A mutational analysis was conducted to investigate the functions of the tobacco etch potyvirus VPgproteinase
(NIa) protein in vivo. The NIa N-terminal domain contains the VPg attachment site, whereas the
C-terminal domain contains a picornavirus 3C-like proteinase. Cleavage at an internal site separating the two
domains occurs in a subset...
We present the evolution of oceanographic conditions off the western coast of South America between 1996 and 1999, including the cold periods of 1996 and 1998–1999 and the 1997–1998 El Niño, using satellite observations of sea level, winds, sea surface temperature (SST), and chlorophyll concentration. Following a period of cold...
Testosterone plays an essential role in sexual differentiation of the male sheep brain. The ovine sexually dimorphic nucleus (oSDN), is 2 to 3 times larger in males than in females, and this sex difference is under the control of testosterone. The effect of testosterone on oSDN volume may result from...
