333 research outputs found
Project Spotlight: Morro Bay Watershed 319 National Monitoring Program Project. National Water Quality Evaluation Project Notes.
History of the town of Hollis, New Hampshire, from its first settlement to the year 1879 : with many biographical sketches of its early settlers, their descendants, and other residents : illustrated with maps and engravings.
Marriages, 1743-1877: p. 343-361: Family registers from 1739-1800: p. 362-393.; Includes bibliographical references
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Mercury accumulation in fish from Cottage Grove Reservoir and its tributaries
A fish sampling program was initiated at Cottage Grove Reservoir
in June of 1974 to investigate mercury accumulation in the fish.
Samples were collected periodicallv from June to November, 1974, and
from June, 1975 through January, 1976 from both the reservoir and its
tributaries. Species collected included spring chinook salmon Oncorhynchus
tshawytscha, rainbow trout Salmo gairdneri, cutthroat trout
Salmo clarki clarki, largemouth bass Micropterus salmoides, and brown
bullhead Ictalurus nebulosus.
Cutthroat trout and spring chinook salmon sampled from a tributary
of Cottage Grove Reservoir in 1974 and 1975 had significantly
less mercury in their muscle tissue than similar fish collected from
the reservoir (P < 0.05).
All species of fish except the 1+ brown bullheads collected in
1974, tended to accumulate mercury with time. Many of the fish
sampled had mercury levels two to three times the FDA guideline of
0.5 [mu] Hg/g. It also appeared that predatory fish accumulated higher
mercury levels than non-predatory species.
The percent of mercury as methylmercury in all species ranged
from 4.3 to 100, with most fish containing between 60% and 90% methylmercury.
Mercury uptake from the food accounted for a significant percentage
of the total mercury uptake of the 0+ spring chinook collected in
1974. The average methylmercury concentration in the diet of the fish
was estimated to be 0.23 [mu]g Hg/g.
The significant difference in mercury concentration and total
body burden of mercury of the spring chinook collected from the Coast
Fork of the Willamette River and Cottage Grove reservoir suggested
that two separate populations of chinook might exist (P < 0.05).
Yearling chinook salmon collected from the reservoir in the
spring of 1976 with greater than 0.20 [mu] Hg/g in the muscle tissue had
greater mortality in saltwater than the control fish which had mercury
concentrations below 0.10 [mu]g Hg/g
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Uncertainty analysis of heat flux measurements estimated using a one-dimensional, inverse heat-conduction program.
The measurement of heat flux in hydrocarbon fuel fires (e.g., diesel or JP-8) is difficult due to high temperatures and the sooty environment. Un-cooled commercially available heat flux gages do not survive in long duration fires, and cooled gages often become covered with soot, thus changing the gage calibration. An alternate method that is rugged and relatively inexpensive is based on inverse heat conduction methods. Inverse heat-conduction methods estimate absorbed heat flux at specific material interfaces using temperature/time histories, boundary conditions, material properties, and usually an assumption of one-dimensional (1-D) heat flow. This method is commonly used at Sandia.s fire test facilities. In this report, an uncertainty analysis was performed for a specific example to quantify the effect of input parameter variations on the estimated heat flux when using the inverse heat conduction method. The approach used was to compare results from a number of cases using modified inputs to a base-case. The response of a 304 stainless-steel cylinder [about 30.5 cm (12-in.) in diameter and 0.32-cm-thick (1/8-in.)] filled with 2.5-cm-thick (1-in.) ceramic fiber insulation was examined. Input parameters of an inverse heat conduction program varied were steel-wall thickness, thermal conductivity, and volumetric heat capacity; insulation thickness, thermal conductivity, and volumetric heat capacity, temperature uncertainty, boundary conditions, temperature sampling period; and numerical inputs. One-dimensional heat transfer was assumed in all cases. Results of the analysis show that, at the maximum heat flux, the most important parameters were temperature uncertainty, steel thickness and steel volumetric heat capacity. The use of a constant thermal properties rather than temperature dependent values also made a significant difference in the resultant heat flux; therefore, temperature-dependent values should be used. As an example, several parameters were varied to estimate the uncertainty in heat flux. The result was 15-19% uncertainty to 95% confidence at the highest flux, neglecting multidimensional effects
The Long-Baseline Neutrino Experiment: Exploring Fundamental Symmetries of the Universe
The preponderance of matter over antimatter in the early Universe, the
dynamics of the supernova bursts that produced the heavy elements necessary for
life and whether protons eventually decay --- these mysteries at the forefront
of particle physics and astrophysics are key to understanding the early
evolution of our Universe, its current state and its eventual fate. The
Long-Baseline Neutrino Experiment (LBNE) represents an extensively developed
plan for a world-class experiment dedicated to addressing these questions. LBNE
is conceived around three central components: (1) a new, high-intensity
neutrino source generated from a megawatt-class proton accelerator at Fermi
National Accelerator Laboratory, (2) a near neutrino detector just downstream
of the source, and (3) a massive liquid argon time-projection chamber deployed
as a far detector deep underground at the Sanford Underground Research
Facility. This facility, located at the site of the former Homestake Mine in
Lead, South Dakota, is approximately 1,300 km from the neutrino source at
Fermilab -- a distance (baseline) that delivers optimal sensitivity to neutrino
charge-parity symmetry violation and mass ordering effects. This ambitious yet
cost-effective design incorporates scalability and flexibility and can
accommodate a variety of upgrades and contributions. With its exceptional
combination of experimental configuration, technical capabilities, and
potential for transformative discoveries, LBNE promises to be a vital facility
for the field of particle physics worldwide, providing physicists from around
the globe with opportunities to collaborate in a twenty to thirty year program
of exciting science. In this document we provide a comprehensive overview of
LBNE's scientific objectives, its place in the landscape of neutrino physics
worldwide, the technologies it will incorporate and the capabilities it will
possess.Comment: Major update of previous version. This is the reference document for
LBNE science program and current status. Chapters 1, 3, and 9 provide a
comprehensive overview of LBNE's scientific objectives, its place in the
landscape of neutrino physics worldwide, the technologies it will incorporate
and the capabilities it will possess. 288 pages, 116 figure
Long-Baseline Neutrino Facility (LBNF) and Deep Underground Neutrino Experiment (DUNE) Conceptual Design Report Volume 2: The Physics Program for DUNE at LBNF
The Physics Program for the Deep Underground Neutrino Experiment (DUNE) at
the Fermilab Long-Baseline Neutrino Facility (LBNF) is described
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