Tilts in strong ground motion
V. Graizer
2006, Bulletin of the Seismological Society of America (96) 2090-2102
Most instruments used in seismological practice to record ground motion are pendulum seismographs, velocigraphs, or accelerographs. In most cases it is assumed that seismic instruments are only sensitive to the translational motion of the instrument's base. In this study the full equation of pendulum motion, including the inputs of rotations...
Development and implementation of software systems for imaging spectroscopy
J.W. Boardman, R. N. Clark, A.S. Mazer, L.L. Biehl, F.A. Kruse, J. Torson, K. Staenz
2006, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
Specialized software systems have played a crucial role throughout the twenty-five year course of the development of the new technology of imaging spectroscopy, or hyperspectral remote sensing. By their very nature, hyperspectral data place unique and demanding requirements on the computer software used to visualize, analyze, process and interpret them....
Interpreting map art with a perspective learned from J.M. Blaut
D. Varanka
2006, Cartographic Perspectives 15-23
Map art has been mentioned only briefly in geographic or cartographic literature, and has been analyzed almost entirely at the interpretive level. This paper attempts to define and evaluate the cartographic value of contemporary map-like art by placing the body of work as a whole in the theoretical concepts proposed...
Vertical variability in saturated zone hydrochemistry near Yucca Mountain, Nevada
G. L. Patterson, P.S. Striffler
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
The differences in the saturated zone hydrochemistry with depth at borehole NC-EWDP-22PC reflect the addition of recharge along Fortymile Wash. The differences in water chemistry with depth at borehole NC-EWDP-19PB appear to indicate that other processes are involved. Water from the lower part of NC-EWDP-19PB possesses chemical characteristics that clearly...
Use of thermodynamic sorption models to derive radionuclide Kd values for performance assessment: Selected results and recommendations of the NEA sorption project
M. Ochs, J.A. Davis, M. Olin, T.E. Payne, C.J. Tweed, M.M. Askarieh, S. Altmann
2006, Conference Paper, Radiochimica Acta
For the safe final disposal and/or long-term storage of radioactive wastes, deep or near-surface underground repositories are being considered world-wide. A central safety feature is the prevention, or sufficient retardation, of radionuclide (RN) migration to the biosphere. To this end, radionuclide sorption is one of the most important processes. Decreasing...
Surface fault slip associated with the 2004 Parkfield, California, earthquake
M. J. Rymer, J. C. Tinsley III, J.A. Treiman, J.R. Arrowsmith, K.B. Ciahan, A.M. Rosinski, W. A. Bryant, Hollice A. Snyder, G. S. Fuis, N.A. Toke, G.W. Bawden
2006, Bulletin of the Seismological Society of America (96)
Surface fracturing occurred along the San Andreas fault, the subparallel Southwest Fracture Zone, and six secondary faults in association with the 28 September 2004 (M 6.0) Parkfield earthquake. Fractures formed discontinuous breaks along a 32-km-long stretch of the San Andreas fault. Sense of slip was right lateral; only locally was...
Reticulate melanism in western painted turtles (Chrysemys picta bellii): Exploring linkages with habitat and heating rates
W.K. Gronke, S. R. Chipps, S.J. Bandas, K.F. Higgins
2006, American Midland Naturalist (156) 289-298
In western painted turtles (Chrysemys picta bellii), males often exhibit one of two morphs: (1) a reticulated form, characterized by an intricate network of dark markings on the carapace or (2) a non-reticulated form. Although several hypotheses have been proposed to explain the adaptive significance of reticulate melanism (RM) on...
Use of cotton gin trash to enhance denitrification in restored forested wetlands
S. Ullah, S.P. Faulkner
2006, Forest Ecology and Management (237) 557-563
Lower Mississippi Valley (LMV) has lost about 80% bottomland hardwood forests, mainly to agriculture. This landscape scale alteration of the LMV resulted in the loss of nitrate (NO3) removal capacity of the valley, contributing to nitrogen (N)-enhanced eutrophication and potentially hypoxia in the northern Gulf of Mexico. Restoration of hardwood...
Comparison of the effects and performance of four types of radiotransmitters for use with scoters
S. A. Iverson, W. S. Boyd, Daniel Esler, D.M. Mulcahy, Timothy D. Bowman
2006, Wildlife Society Bulletin (34) 656-663
Radiotransmitters are widely used in wildlife ecology, often providing data that cannot be collected using other methods. However, negative effects have been associated with the use of transmitters for some species. We evaluated the effects and performance of 4 radiotransmitter types for use with surf and white-winged scoters (Melanitta perspicillata...
Global synthesis of groundwater recharge in semiarid and arid regions
Bridget R. Scanlon, K.E. Keese, A. L. Flint, L. E. Flint, C.B. Gaye, W.M. Edmunds, I. Simmers
2006, Hydrological Processes (20) 3335-3370
Global synthesis of the findings from ∼140 recharge study areas in semiarid and arid regions provides important information on recharge rates, controls, and processes, which are critical for sustainable water development. Water resource evaluation, dryland salinity assessment (Australia), and radioactive waste disposal (US) are among the primary goals of many...
Spatial correlation of shear-wave velocity within San Francisco Bay Sediments
E.M. Thompson, L.G. Baise, R. E. Kayen
2006, Conference Paper, GeoCongress 2006: Geotechnical Engineering in the Information Technology Age
Sediment properties are spatially variable at all scales, and this variability at smaller scales influences high frequency ground motions. We show that surface shear-wave velocity is highly correlated within San Francisco Bay Area sediments using shear-wave velocity measurements from 210 seismic cone penetration tests. We use this correlation to estimate...
Distribution and movement of humpback chub in the Colorado River, Grand Canyon, based on recaptures
C.P. Paukert, L.G. Coggins Jr., C.E. Flaccus
2006, Transactions of the American Fisheries Society (135) 539-544
Mark-recapture data from the federally endangered humpback chub Gila cypha in the Colorado River, Grand Canyon, were analyzed from 1989 to 2002 to determine large-scale movement patterns and distribution. A total of 14,674 recaptures from 7,127 unique fish were documented; 87% of the recaptures occurred in the same main-stem river...
Seismoelectric numerical modeling on a grid
S.S. Haines, S.R. Pride
2006, Geophysics (71)
Our finite-difference algorithm provides a new method for simulating how seismic waves in arbitrarily heterogeneous porous media generate electric fields through an electrokinetic mechanism called seismoelectric coupling. As the first step in our simulations, we calculate relative pore-fluid/grain-matrix displacement by using existing poroelastic theory. We then calculate the electric current...
Light-mediated Zn uptake in photosynthetic biofilm
J.M. Morris, A.M. Farag, D. A. Nimick, J.S. Meyer
2006, Hydrobiologia (571) 361-371
Our experiments conducted under controlled laboratory conditions demonstrate diel uptake and release of zinc (Zn) in lab-cultured biofilm exposed to Zn concentrations that are present in some mining-impacted streams (1–2 mg Zn/l). Specifically, at constant pH, temperature, and aqueous Zn concentrations in the exposure water, biofilm accumulated Zn during the light...
Absolute calibration accuracy of L4 TM and L5 TM sensor image pairs
G. Chander, E. Micijevic
2006, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The Landsat suite of satellites has collected the longest continuous archive of multispectral data of any land-observing space program. From the Landsat program's inception in 1972 to the present, the Earth science user community has benefited from a historical record of remotely sensed data. However, little attention has been paid...
Airport geomagnetic surveys in the United States
A. Berarducci
2006, NATO Security through Science Series C: Environmental Security 247-258
The Federal Aviation Administration (FAA) and the United States military have requirements for design, location, and construction of compass calibration pads (compass roses), these having been developed through collaboration with US Geological Survey (USGS) personnel. These requirements are detailed in the FAA Advisory Circular AC 150/5300-13, Appendix 4, and in...
Virulence comparisons of infectious hematopoietic necrosis virus U and M genogroups in sockeye salmon and rainbow trout
K.A. Garver, W.N. Batts, Gael Kurath
2006, Journal of Aquatic Animal Health (18) 232-243
Infectious hematopoietic necrosis virus (IHNV) is an aquatic rhabdovirus that infects salmonids in the Pacific Northwest of the United States, Europe, and Asia. Isolates of IHNV have been phylogenetically classified into three major viral genogroups, designated U, M, and L. To characterize virulence of IHNV in the context of these...
Rupture propagation of the 2004 Parkfield, California, earthquake from observations at the UPSAR
Joe B. Fletcher, P. Spudich, L.M. Baker
2006, Bulletin of the Seismological Society of America (96)
Using a short-baseline seismic array (U.S. Geological Survey Parkfield Dense Seismograph Array [UPSAR]) about 12 km west of the rupture initiation of the 28 September 2004 M 6.0 Parkfield, California, earthquake, we have observed the movement of the rupture front of this earthquake on the San Andreas fault. The sources...
Prevalence of Microsporidia, Cryptosporidium spp., and Giardia spp. in beavers (Castor canadensis) in Massachusetts
R. Fayer, M. Santin, J.M. Trout, S. DeStefano, K. Koenen, T. Kaur
2006, Journal of Zoo and Wildlife Medicine (37) 492-497
Feces from 62 beavers (Castor canadensis) in Massachusetts were examined by fluorescence microscopy (IFA) and polymerase chain reaction (PCR) for Microsporidia species, Cryptosporidium spp., and Giardia spp. between January 2002 and December 2004. PCR-positive specimens were further examined by gene sequencing. Protist parasites were detected in 6.4% of the beavers....
Research on genesis of pyrite near the Permian-Triassic boundary in meishan, Zhejiang, China
Y.-F. Jiang, Y.-G. Tang, C. L. Chou
2006, Journal of China University of Mining and Technology (16) 457-460
The content and crystal forms of pyrite and sulfur isotope composition of pyrite sulfur as well as its vertical distribution near the Permian-Triassic (P/T) boundary in the Meishan section, Changxing county, Zhejiang province, China were studied using geological, petrological, mineralogical and geochemical methods (techniques). The result showed that the genesis...
Using a rapid method to predict recreational water quality at Cuyahoga Valley National Park, Ohio
R.N. Bushon, A.M.G. Brady, M.B. Plona
2006, Park Science (24) 89-93
Scientists research a quick, affordable, and accurate way to estimate E. coli concentrations in water using a new and potentially useful one-hour technique....
Onset of snowmelt and streamflow in 2004 in the Western Unites States: How shading may affect spring streamflow timing in a warmer world
J.D. Lundquist, A. L. Flint
2006, Journal of Hydrometeorology (7) 1199-1217
Historic streamflow records show that the onset of snowfed streamflow in the western United States has shifted earlier over the past 50 yr, and March 2004 was one of the earliest onsets on record. Record high temperatures occurred throughout the western United States during the second week of March, and...
Panel: Eco-informatics and decision making managing our natural resources
J.B. Gushing, T. Wilson, F. Martin, J. Schnase, S. Spengler, L. Sugarbaker, T. Pardo
2006, Conference Paper, ACM International Conference Proceeding Series
This panel responds to the December 2004 workshop on Eco-Informatics and Decision Making [1], which addressed how informatics tools can help with better management of natural resources and policy making. The workshop was jointly sponsored by the NSF, NBII, NASA, and EPA. Workshop participants recommended that informatics research in four...
Deep Europe today: Geophysical synthesis of the upper mantle structure and lithospheric processes over 3.5 Ga
I.M. Artemieva, H. Thybo, M.K. Kaban
Gee D.G.Stephenson R.A., editor(s)
2006, Geological Society Memoir 11-41
We present a summary of geophysical models of the subcrustal lithosphere of Europe. This includes the results from seismic (reflection and refraction profiles, P- and S-wave tomography, mantle anisotropy), gravity, thermal, electromagnetic, elastic and petrological studies of the lithospheric mantle. We discuss major tectonic processes as reflected in the lithospheric...
Applications of GIS and database technologies to manage a Karst Feature Database
Y. Gao, R.G. Tipping, E.C. Alexander Jr.
2006, Journal of Cave and Karst Studies (68) 144-152
This paper describes the management of a Karst Feature Database (KFD) in Minnesota. Two sets of applications in both GIS and Database Management System (DBMS) have been developed for the KFD of Minnesota. These applications were used to manage and to enhance the usability of the KFD. Structured Query Language...
