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Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.

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Effects of antenna length and material on output power and detection of miniature radio transmitters Effects of antenna length and material on output power and detection of miniature radio transmitters

The optimal antenna of transmitters used in small aquatic animals is often a compromise between efficient radio wave propagation and effects on animal behavior. Radio transmission efficiency generally increases with diameter and length of the conductor, but increased antenna length or weight can adversely affect animal behavior. We evaluated the effects of changing antenna length and...
Authors
J.W. Beeman, N. Bower, S. Juhnke, L. Dingmon, Tillaart M. Van Den, T. Thomas
By
Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Eo-Ulrichian to Neo-Ulrichian views: The renaissance of "layer-cake stratigraphy" Eo-Ulrichian to Neo-Ulrichian views: The renaissance of "layer-cake stratigraphy"

Classical notions of "layer-cake stratigraphy" have been denigrated as representing an antiquated "Neptunian" view of the geologic record with the American paleontologist-stratigrapher E.O. Ulrich vilified as its quintessential advocate. Some of the extreme "layer-cake" interpretations of E.O. Ulrich are demonstrably incorrect, especially where applied in marginal marine and terrestrial...
Authors
Carlton E. Brett, P.I. McLaughlin, G.C. Baird

Ephemeroptera, plecoptera, megaloptera, and trichoptera of Great Smoky Mountains National Park Ephemeroptera, plecoptera, megaloptera, and trichoptera of Great Smoky Mountains National Park

Great Smoky Mountains National Park (GSMNP), situated on the mountainous border of North Carolina and Tennessee, is recognized as one of the most highly diverse protected areas in the temperate region. In order to provide baseline data for the scientific management of GSMNP, an All Taxa Biodiversity Inventory (ATBI) was initiated in 1998. Among the goals of the ATBI are to discover the...
Authors
C.R. Parker, O.S. Flint, L.M. Jacobus, B.C. Kondratieff, W.P. McCafferty, J.C. Morse

Estimating locations and total magnetization vectors of compact magnetic sources from scalar, vector, or tensor magnetic measurements through combined Helbig and Euler analysis Estimating locations and total magnetization vectors of compact magnetic sources from scalar, vector, or tensor magnetic measurements through combined Helbig and Euler analysis

The Helbig method for estimating total magnetization directions of compact sources from magnetic vector components is extended so that tensor magnetic gradient components can be used instead. Depths of the compact sources can be estimated using the Euler equation, and their dipole moment magnitudes can be estimated using a least squares fit to the vector component or tensor gradient...
Authors
J. D. Phillips, M.N. Nabighian, D.V. Smith, Y. Li

Evaluating the accotink creek restoration project for improving water quality, in-stream habitat, and bank stability Evaluating the accotink creek restoration project for improving water quality, in-stream habitat, and bank stability

Increased urbanization results in a larger percentage of connected impervious areas and can contribute large quantities of stormwater runoff and significant quantities of debris and pollutants (e.g., litter, oils, microorganisms, sediments, nutrients, organic matter, and heavy metals) to receiving waters. To improve water quality in urban and suburban areas, watershed managers often...
Authors
S.D. Struck, A. Selvakumar, K. Hyer, T. O’Connor

Evaluating the genetic relationships of the Mentasta and Nelchina caribou herds in Southcentral Alaska Evaluating the genetic relationships of the Mentasta and Nelchina caribou herds in Southcentral Alaska

No abstract available.
By
Ecosystems Mission Area, Alaska Science Center
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