Northeast Pacific benthic foraminiferal δ¹⁸O and δ¹³C reveal repeated millennial-scale events of strong deep-sea
ventilation (associated with nutrient depletion and/or high gas exchange) during stadial (cool, high ice volume) episodes
from 10 to 60 ka, opposite the pattern in the deep North Atlantic. Two climate mechanisms may explain this pattern....
Revised April 1973. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Between 2007 and 2009, researchers from Green Point Consulting, Oregon State University, and the South Slough National Estuarine Research Reserve collected data on ecological and physical characteristics at five high-quality “least disturbed” tidal wetland sites in four Oregon estuaries.
The reference sites included in this project are (1) Blind Slough...
It is well known that multipath effects cause inter-symbol interference (ISI) for high-speed signaling and ultimately limit the achievable data rate at any frequency band. In this thesis, we study several different methods to tackle this issue and provide solutions for establishing efficient wireless links that can provide several Gbps...
Published August 1971. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Revised August 1973. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Revised April 1959.Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Multibeam (1 m resolution) and side scan data collected from an autonomous underwater vehicle, and
lava samples, radiocarbon-dated sediment cores, and observations of flow contacts collected by remotely
operated vehicle were combined to reconstruct the geologic history and flow emplacement processes on
Axial Seamount’s summit and upper rift zones. The...
Drop size distributions produced by the turbulent pipe flow of
dispersions of immiscible liquids were measured photographically.
A mathematical model was developed which predicted both the shape
of the experimentally observed distributions and the experimentally
observed kinetics of the breakup process.
The mutually saturated water and organic phases were pumped...
The root disease fungus Inonotus tomentosus, common in the old
growth boreal forests of British Columbia, poses a threat to the
health of second growth forests established on sites with a previous
history of root disease. Colonized stumps occur in groups of 1 to 6;
the groups are clumped within...
New research has identified flavonols as a class of phenolic compounds which can be manipulated by both vineyard and winery practices. These phenolic compounds are key quality components of wine, affecting sensory characteristics, wine color, and wine stability. Modification of the phenolic precursors in grapes occur during fermentation and aging...
Occult deposition is the direct uptake of cloudwater by vegetation that comes into
physical contact with wind-driven cloud droplets. This can be a significant pathway for
hydrological and chemical fluxes from the atmosphere to some forests. Methods for
estimating cloudwater fluxes to forests are reviewed. Previous studies have neglected
the...
Video of overland dispersal and drought escape behavior in a flightless aquatic insect, the giant water bug Abedus herberti (Hemiptera: Belostomaidae). April 9, 2009 High Creek, Galiuro Mountains, Arizona (AZ) USA.
This dataset includes comma-separated text files with tabular data from survey responses and the R code used to visualize them. The following abstract describes the research study. See the README file for a more thorough description of the data. Purpose: The purpose of this case study is to demonstrate how...
Soil moisture depletion trends under five plant species growing
on the clear-cuts of the Marys Peak Watershed near Corvallis,
Oregon, were followed during the summers of 1963 and 1964. The
species were Holcus lanatus, Lotus crassifolius var. subglaber,
Gaultheria shallon, Berberis nervosa, and Acer circinatum; and
were dominant plants of...
Tan spot of wheat is an economically significant disease caused by the fungal pathogen, Pyrenophora tritici-repentis. Certain races of the fungus secrete Ptr ToxA (ToxA), a 13.2 kDa proteinaceous host-selective toxin that is responsible and sufficient to cause disease in susceptible wheat varieties. Disease symptoms develop only when the ToxA...
There are several factors which affect the cost and efficiency
of a structure. The most important and basic factors are: the predominant
stress, the way the structure carries the loads and the
shape of the structure.
The structures in which the predominant stress is not bending
have been chosen to...
Gene synthesis attempts to assemble user-defined DNA sequences with base-level precision. Verifying the sequences of construction intermediates and the final product of a gene synthesis project is a critical part of the workflow, yet one that has received the least attention. Sequence validation is equally important for other kinds of...
Since the 1990s, researchers around the world have been creating antineutrino detectors for monitoring power reactors. These detectors have been deployed at light water reactors and are able to determine power levels and burn up throughout a fuel cycle. This technology could allow the IAEA to monitor LWRs remotely and...
In this work, we first introduce a novel approach to the long term irrigation scheduling
using Genetic Algorithms (GAs). We explore the effectiveness of GAs in the context of
optimizing nonlinear crop models and describe application requirements and implementation of
the technique. GAs were found to converge quickly to near-optimal...
Mount Hood National Forest provides opportunities for many forms of outdoor recreation. Recreationists spend money to pursue outdoor activities on public lands such as national forests and national parks. The purpose of this study was to measure the economic contribution of national forest visitor expenditures on the local economy of...
The goal of this thesis was to develop a process of producing small monodisperse
alginate gel beads. The phenomenon of controlled jet break-up of alginate solution jet
with assisted vibration was used to form uniform sodium alginate droplets which were
subsequently crosslinked with divalent calcium ion to form gel beads....
The thesis presents a useful and effective blend of insights about macroeconomic business fluctuations and the effects of government expenditure in economic growth in Korea.
In Chapter I, I show that the joint behavior of key Korean macroeconomic variables is consistent with traditional Keynesian interpretation of macroeconomic business fluctuations by...
Posting advisory speed signs at sharp horizontal curve sites is a practice well established in the United States. The purpose of these signs is to provide the driving public with a safe speed to negotiate such curves; however, the link between these signs and safety has not yet been clearly...
The Hi-CLIMB seismic experiment (2002-2005) operated 233 sites along an 800-km long north-south array extending from the Himalayan foreland into the Central Tibetan Plateau and a flanking 350x350 km lateral array in southern Tibet and eastern Nepal. Data from the experiment’s second phase (June 2004 to August 2005), when stations...
Modern science was produced by a Christian society,
and although science has had an effect on Christianity, it
could not itself remain unaffected. In the second half of
the nineteenth century, the subject of evolution was as
much a religious as a scientific issue. The battle line
was drawn and...
Commercial thinnings in a 50-year-old stand of nearly pure,
well stocked, even-aged western hemlock (Tsuga heterophylla) on the
Hemlock Experimental Forest near Hoquiam, Washington, began in
1952 and ended in 1968. The experiment consisted of two replications
of four different thinning treatments, high and low thinning, both at
frequent and...
The effect of adding a high moisture gel manufactured from a combination of konjac flour (2%) and kappa carrageenan (1%) to a reduced fat ground beef system was evaluated. Lean beef (95-10) and 50-50 fat beef trimmings were used to manufacture reduced fat ground beef patties containing konjac flour/carrageenan (K/C)...
Seismic refraction data collected in 1985 by the USGS were used in
this study to derive the P and S velocity structure of the crust beneath the
Gulf of Maine. The data quality differs among instruments and is affected
by surficial lateral heterogeneities, a ringy source signature and
reverberations. Velocity...
The objectives of this study were (a) to measure the amount
of cross-pollination caused by three bee species at 10, 20 and 40
rods distance from a foreign pollen source, (b) to measure the effects
of bee species, planting pattern and season on broad sense heritability
estimates for seed yield...
Cambial activity in white spruce stems in Alaska was observed
from April, 1964 to September, 1965 in over 300 samples taken from
50- to 60-year-old natural stands. Mitotic index was used as a measure
of the rate of periclinal division of fusiform cells in the cambial
zone. Anticlinal divisions are...