Numerical modeling of an enhanced very early time electromagnetic (VETEM) prototype system
T.J. Cui, W.C. Chew, A.A. Aydiner, D.L. Wright, D.V. Smith, J.D. Abraham
2000, IEEE Antennas and Propagation Magazine (42) 17-27
In this paper, two numerical models are presented to simulate an enhanced very early time electromagnetic (VETEM) prototype system, which is used for buried-object detection and environmental problems. Usually, the VETEM system contains a transmitting loop antenna and a receiving loop antenna, which run on a lossy ground to detect...
Detection of crystalline hematite mineralization on Mars by the Thermal Emission Spectrometer: evidence for near-surface water
P. R. Christensen, J. L. Bandfield, R. N. Clark, K.S. Edgett, V.E. Hamilton, T. Hoefen, H. H. Kieffer, R.O. Kuzmin, M. D. Lane, M. C. Malin, R.V. Morris, J.C. Pearl, R. Pearson, T. L. Roush, S. W. Ruff, M. D. Smith
2000, Journal of Geophysical Research E: Planets (105) 9623-9642
The Thermal Emission Spectrometer (TES) instrument on the Mars Global Surveyor (MGS) mission has discovered a remarkable accumulation of crystalline hematite (α-Fe2O3) that covers an area with very sharp boundaries approximately 350 by 350–750 km in size centered near 2°S latitude between 0° and 5°W longitude (Sinus Meridiani). Crystalline hematite...
Plant Checklist for Point Reyes National Seashore (Revised)
Gary M. Fellers, Virginia Norris, Wilma Follette, Doreen Smith
2000, Book
No abstract available at this time...
Identification of a basaltic component on the Martian surface from Thermal Emission Spectrometer data
P. R. Christensen, J. L. Bandfield, M. D. Smith, V.E. Hamilton, Roger N. Clark
2000, Journal of Geophysical Research: Planets (105) 9609-9621
The Mars Global Surveyor Thermal Emission Spectrometer (TES) instrument collected 4.8×106 spectra of Mars during the initial aerobraking and science‐phasing periods of the mission (September 14, 1997, through April 29, 1998). Two previously developed atmosphere‐removal models were applied to data from Cimmeria Terra (25°S, 213°W). The surface spectra derived for these...
Environmental geochemistry at the global scale
J. Plant, D. Smith, B. Smith, L. Williams
2000, Journal of the Geological Society (157) 837-849
Land degradation and pollution caused by population pressure and economic development pose a threat to the sustainability of the Earth's surface, especially in tropical regions where a long history of chemical weathering has made the surface environment particularly fragile. Systematic baseline geochemical data provide a means of monitoring the state...
Analytical results and conceptual model of mine drainage at the Holden Mine, Chelan County, Washington
J.E. Kilburn, D. B. Smith, S. J. Sutley
1999, Open-File Report 99-348
Influence of temperature and substrate on infection rate, triactinomyxon production, and release duration from eastern tubifex worms infected with Myxobolus cerebralis
Thomas Waldrop, Vicki Blazer, David Smith, Bane Schill, Christine Densmore
B. Schill, T. Waldrop, V. Blazer, editor(s)
1999, Book, 5th Annual Whirling Disease Symposium: Research and Management Perspectives
Salmonid whirling disease is caused by Myxobolus cerebralis, a metazoan parasite with a two host life cycle involving salmonid fish a an aquatic oligochaete, Tubifex tubifex (Wolf, Markiw and Hiltunen, 1986). Whirling disease has been reported in 22 U.S. states with the greatest losses occurring in the salmonid fisheries...
Preliminary effects of water hardness on triactinomyxon production and development from eastern tubifex worms infected with Myxobolus cerebralis
Thomas B. Waldrop, Christine Densmore, Vicki Blazer, Dave Smith, Bane Schill
B. Schill, T. Waldrop, V. Blazer, editor(s)
1999, Book, 5th Annual Whirling Disease Symposium: Research and Management Perspectives
Whirling disease is caused by Myxobolus cerebralis and requires an intermediate oligochaete host identified as Tubifex tubifex (Wolf, Markiw, and Hiltunen, 1986). M. cerebralis spores ingested by the tubifex worms develop into triactinomyxons (tams) that are eventually released into the water column to infect salmonid fish. There may...
Potential effects of pathogen-induced hemlock forest decline on aquatic biodiversity in Delaware Water Gap National Recreation Area
C.D. Snyder, J.A. Young, D. Lemarie, D. R. Smith, R. Ross, R. Bennett
1999, Keystone Surveyor 6-7
Petrology and geochemistry of late-stage intrusions of the A-type, mid-Proterozoic Pikes Peak batholith (Central Colorado, USA): Implications for petrogenetic models
D. R. Smith, J. Noblett, R. A. Wobus, D. Unruh, J. Douglass, R. Beane, C. Davis, S. Goldman, G. Kay, B. Gustavson, B. Saltoun, J. Stewart
1999, Precambrian Research (98) 271-305
The ~1.08 Ga anorogenic, A-type Pikes Peak batholith (Front Range, central Colorado) is dominated by coarse-grained, biotite ?? amphibole syenogranites and minor monzogranites, collectively referred to as Pikes Peak granite (PPG). The batholith is also host to numerous small, late-stage plutons that have been subdivided into two groups (e.g. Wobus,...
Influence of eastern hemlock on aquatic biodiversity in Delaware Water Gap National Recreation Area
C. Snyder, J. Young, D. Smith, D. Lemarie, R. Ross, R. Bennett
1999, Report
No abstract available at this time...
The effects of crude oil and remediation burning on three clones of smooth cordgrass (Spartina alterniflora loisel.)
D.L. Smith, C.E. Proffitt
1999, Estuaries (22) 616-623
Burning has been employed as an oil spill remediation technique in coastal marshes, even though the combined and interactive effects of oil and burning on vegetation are poorly understood. Variation among clones of perennial marsh grasses in response to these perturbations is not known. We performed a greenhouse experiment designed...
Water resources data, North Carolina, water year 1998. Volume 1. Surface-water records
B.C. Ragland, D.G. Smith, R.G. Barker, J. B. Robinson
1999, Water Data Report NC-98-1
No abstract available....
Geomorphology, flood-plain tailings, and metal transport in the upper Clark Fork Valley, Montana
J. Dungan Smith, J. H. Lambing, D. A. Nimick, Charles Parrett, Michael Ramey, William Schafer
1998, Water-Resources Investigations Report 98-4170
No abstract available....
Geochemical baseline studies and relations between water quality and streamflow in the Upper Blackfoot River Watershed, Montana; progress report for July 1997 - March 1998
S.A. Nagorski, J.A. Shifflett, J.N. Moore, D. B. Smith
1998, Open-File Report 98-499
Bedrock geologic map of the Joplin 1° x 2° quadrangle, Kansas and Missouri
J. R. McCauley, D. C. Smith
1998, IMAP 2426-B
No abstract available....
Geochemical baselines for surface waters and stream sediments and processes controlling element mobility, Rough and Ready Creek and Oregon Caves National Monument and vicinity, southwestern Oregon
W. R. Miller, D. B. Smith, A. L. Meier, Paul H. Briggs, P. M. Theodorakos, R. F. Sanzolone, R. B. Vaughn
1998, Open-File Report 98-201
Limits of retrospective power analysis
Patrick D. Gerard, David R. Smith, Govinda Weerakkody
1998, Journal of Wildlife Management (62) 801-807
Power analysis after study completion has been suggested to interpret study results. We present 3 methods of estimating power and discuss their limitations. We use simulation studies to show that estimated power can be biased, extremely variable, and severely bounded. We endorse the practice of computing power to detect a...
Electrogeochemical sampling with NEOCHIM - results of tests over buried gold deposits
R. W. Leinz, D.B. Hoover, D.L. Fey, D. B. Smith, T. Patterson
1998, Journal of Geochemical Exploration (61) 57-86
Electrogeochemical extraction methods are based on the migration of ions in an electric field. Ions present in soil moisture are transported by an applied current into fluids contained in special electrodes placed on the soil. The fluids are then collected and analyzed. Extractions are governed by Faraday's and Ohm's laws...
Evaluation of directed flow to improve fish guidance for the surface collection program, Cowlitz Falls Dam
T.J. Darland, D.H. Feil, B.J. Hausmann, C. D. Smith, D.W. Rondorf, J.D. Serl, C.F. Morrill
1998, Report
Abstract not available...
Results from the Mars global surveyor thermal emission spectrometer
P. R. Christensen, D.L. Anderson, S.C. Chase, R.T. Clancy, R. N. Clark, B.J. Conrath, H. H. Kieffer, R.O. Kuzmin, M. C. Malin, J.C. Pearl, T. L. Roush, M. D. Smith
1998, Science (279) 1692-1696
The Thermal Emission Spectrometer spectra of low albedo surface materials suggests that a four to one mixture of pyroxene to plagioclase, together with about a 35 percent dust component provides the best fit to the spectrum. Qualitative upper limits can be placed on the concentration of carbonates (<10 percent), olivine...
Impact of zebra and quagga mussels (Dreissena spp.) on freshwater unionids (Bivalvia: Unionidae) in the Detroit River of the Great Lakes
D. W. Schloesser, W. P. Kovalak, G. D. Longton, K. L. Ohnesorg, R. D. Smithee
1998, American Midland Naturalist (140) 299-313
To assess the impact of zebra and quagga mussel (Dreissena spp.) infestation on unionids, unionids (Bivalvia: Unionidae) were sampled in the Detroit River in 1982–1983, before mussels invaded the river, and in 1992 and 1994, after mussels invaded the river. Live unionids at four stations along the southeastern shore accounted for...
Florida Bay surface salinities
Robert B. Halley, Dewitt Smith, Mark Hansen
1998, Open-File Report 98-142
No abstract available....
Water resources data, North Carolina, water year 1997. Volume 1. Surface-water records
B.C. Ragland, D.G. Smith, R.G. Barker, J. B. Robinson
1998, Water Data Report NC-97-1
No abstract available....
Virulence of Renibacterium salmoninarum to salmonids
C. E. Starliper, D. R. Smith, T. Shatzer
1997, Journal of Aquatic Animal Health (9) 1-7
Virulence of Renibacterium salmoninarum isolates representing five origins was evaluated in eight salmonid hosts; four origins were of Lake Michigan and the fifth was of the Pacific Northwest. The species type strain, ATCC (American Type Culture Collection) 33209, was also included. Each isolate was grown in a kidney disease medium...
