Herbicide resistance is an exceptional marker to quantify gene flow. Quantification of pollen-, seed-, and vegetative propagule-mediated gene flow provides key weed biology information. Pollen-mediated gene flow influences the genetic variance within a population, the frequency of multiple or polygenic herbicide resistance, and the evolutionary dynamics of a species. Seed-mediated...
The spatial and temporal behavior of invasive species spread implies that optimal management strategies involve decisions over space and time. Dispersal and propagule pressure are two primary drivers of the spatial-temporal ecological process of species invasion. In the case of riparian communities, stream flow drives the dispersal of vegetation propagules....
This study develops theoretical and empirical models to analyze the
motivations and outcomes of Oregon business decisions for voluntary
environmental management. More specifically, the following issues are explored
in this study: What motivates a facility to over-comply with environmental
regulations? Why does a facility adopt an environmental management plan
(EMP)?...
Quarantines and control programs are two policy tools used to prevent and reduce the damages caused by invasive species. Quarantines restrict the movement of material that could spread invasive species. Their requirements impose costs on businesses within the quarantine zone by creating barriers to trade and increasing production costs, which...
Large canine breeds are commonly diagnosed with a type of elbow disease called fragmented medial coronoid process (FMCP). FMCP occurs when the cartilage and bone of the coronoid process, located on the ulna, is fractured. Etiologies include mechanical overload of the ulna and incongruences of the radius and ulna with...
The purpose of this study was to investigate the
effect of teachers' behaviors and characteristics upon the
development of student mathematical critical thinking
skills. From a pool of 20 teachers, whose students had
been pre- and post-tested for a measure of critical thinking
skills, 10 middle level teachers were selected...
The main goal of the study was to investigate high school advanced placement
calculus teachers' subject matter and pedagogical perceptions by examining the following
questions: What are the teachers' perceptions of the concept of limit, the role of limits,
and the teaching of limits in calculus? Additionally, the sampling technique...
Decision Feedback Equalization (DFE) in a data recovery channel filters
the bit decision in the current symbol period in generating the sample at the
comparator in the subsequent clock period. The operations of sampling,
comparing, filtering the decision bits into a feedback signal, and subtraction of
that feedback signal are...
For many resource-based communities throughout Oregon the timber
industry plays an important role. In many of these areas, federal
land holdings comprise a large proportion of the area's land holdings.
Management decisions regarding resource use on the National Forest
lands can have a major influence on the stability of local...