Small crack fatigue is a widely recognized problem in the fatigue of materials; however, there has been limited progress in developing methods for predicting small crack fatigue behavior. In this paper, small crack effects due to crack bridging are addressed. A fatigue threshold R-curve was measured for a 99.5% pure...
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Fatigue threshold R-curves predict small crack fatigue
Joseph Reddeford Walker conducted
a party of men across the Sierra Nevada to the
Pacific coast of California in 1833. Previous
interpretations of the portion of the route
from Humboldt Sink, Nevada, to the San Joaquin
River, California, are not satisfactory. A
body of descriptions of the terrain traversed
exists...
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by
JOHN JOSEPH ZERNEL
A RESEARCH PAPER
submitted to
THE DEPARTMENT OF GEOGRAPHY
OREGON STATE UNI
On the basis of their morphology and seasonal thermal characteristics, recurrent slope lineae (RSL) on Mars have been inferred to be a possible result of the flow of a liquid (likely a saline brine) through the upper portions of the martian regolith. In this note, we analyze repeat HiRISE imaging...
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Markiewicz, W. J., Drube, L., Blaney, D., Arvidson, R. E., Bell, J. F. III, 275
RReynolds, R., Smith, P. H
Anthropogenic and natural stressors often interact to affect organisms. Amphibian populations are undergoing unprecedented declines and extinctions with pesticides and emerging infectious diseases implicated as causal factors. Although these factors often co-occur, their effects on amphibians are usually examined in isolation. We hypothesized that exposure of larval and metamorphic amphibians...
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Amphibian Chytrid Fungus
Buck, J. C., Hua, J., Brogan III, W. R., Dang, T. D., Urbina, J., Bendis, R. J
The identification and mapping of surface cover types
within Crater Lake National Park, Oregon, has been effectively
completed through the utilization of LANDSAT digital
data and NASA U-2 color infrared aerial photography. Classification
of LANDSAT data for surface cover type identification
and mapping was accomplished through use of the
Interactive...
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National Park, Oregon
AN ABSTRACT OF THE THESIS OF
STEPHEN JOSEPH WALSH for the degree of DOCTOR OF
Summary
1. Woody plant encroachment of grasslands is occurring globally, with profound ecological
consequences. Attempts to restore herbaceous dominance may fail if the woody state is resilient
or if intervention leads to an alternate, undesirable state. Restoration outcomes often
hinge on biotic interactions – particularly on priority effects that inhibit...
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experiment
Charles B. Halpern1*, Joseph A. Antos2, Donald McKenzie1,3 and Annette M. Olson4
1School of