Research approach to teaching groundwater biodegradation in karst aquifers
L. King, T. Byl, R. Painter
2006, Conference Paper, ASEE Annual Conference and Exposition, Conference Proceedings
TSU in partnership with the USGS has conducted extensive research regarding biode??gradation of contaminants in karst aquifers. This research resulted in the development of a numerical approach to modeling biodegradation of contaminants in karst aquifers that is taught to environmental engineering students in several steps. First, environmental engineering students are...
Use of borehole radar tomography to monitor steam injection in fractured limestone
C. Gregoire, P. K. Joesten
2006, Near Surface Geophysics (4) 355-365
Borehole radar tomography was used as part of a pilot study to monitor steam‐enhanced remediation of a fractured limestone contaminated with volatile organic compounds at the former Loring Air Force Base, Maine, USA. Radar tomography data were collected using 100‐MHz electric‐dipole antennae before and during steam injection to evaluate whether...
Afghan resource assessment fed positive outlook for exploration
T. R. Klett, C. J. Wandrey, G. F. Ulmishek, A. Amirzada
2006, Oil & Gas Journal (104)
Crude oil, natural gas and natural gas liquids/condensate resources are important for the redevelopment of Afghanistan's infrastructure. Improved living and economic conditions in Afghanistan require increasing the availability of energy particularly by exploitation of Afghanistan's petroleum resources. The four total petroleum systems are subdivided into units with homogeneous geologic traits...
The colloidal thyroxine (T4) ring as a novel biomarker of perchlorate exposure in the African clawed frog Xenopus laevis
F. Hu, Bibek Sharma, S. Mukhi, R. Patino, J.A. Carr
2006, Toxicological Sciences (93) 268-277
The purpose of this study was to determine if changes in colloidal thyroxine (T4) immunoreactivity can be used as a biomarker of perchlorate exposure in amphibian thyroid tissue. Larval African clawed frogs (Xenopus laevis) were exposed to 0, 1, 8, 93, and 1131 ??g perchlorate/l for 38 and 69 days...
Testing of stack-unit/aquifer sensitivity analysis using contaminant plume distribution in the subsurface of Savannah River Site, South Carolina, USA
J.M. Rine, J.M. Shafer, E. Covington, R. C. Berg
2006, Hydrogeology Journal (14) 1620-1634
Published information on the correlation and field-testing of the technique of stack-unit/aquifer sensitivity mapping with documented subsurface contaminant plumes is rare. The inherent characteristic of stack-unit mapping, which makes it a superior technique to other analyses that amalgamate data, is the ability to deconstruct the sensitivity analysis on a unit-by-unit...
Comparing historical catch rates of American shad in multifilament and monofilament nets: A step toward setting restoration targets for Virginia stocks
K.L. Maki, J.M. Hoenig, J.E. Olney, D.M. Heisey
2006, North American Journal of Fisheries Management (26) 282-288
Recreational and commercial harvest of American shad Alosa sapidissima in the Virginia waters of the Chesapeake Bay and its tributaries has been prohibited since 1994. The Atlantic States Marine Fisheries Commission Shad and River Herring Management Plan requires that Virginia develop restoration targets for its shad populations, but estimates of...
Shallow gas off the Rhône prodelta, Gulf of Lions
Ana Garcia-Garcia, Daniel L. Orange, T. Lorenson, Olivier Radakovitch, Tommaso Tesi, Stefano Miserocchi, Serge Berne, P.L. Friend, Chuck Nittrouer, Alain Normand
2006, Marine Geology (234) 215-231
Sediment cores acquired in 2004 off the Rhône prodelta show consistent anomalous methane concentrations of up to 87,440 ppm. Methane compositional and isotopic data support a biogenic origin, although there are a few sites that show strongly depleted δ13C values (− 53‰ PDB) suggesting a mixed source for the gas (biogenic...
Two models for evaluating landslide hazards
J.C. Davis, C.-J. Chung, G.C. Ohlmacher
2006, Computers & Geosciences (32) 1120-1127
Two alternative procedures for estimating landslide hazards were evaluated using data on topographic digital elevation models (DEMs) and bedrock lithologies in an area adjacent to the Missouri River in Atchison County, Kansas, USA. The two procedures are based on the likelihood ratio model but utilize different assumptions. The empirical likelihood...
Order from noise: Toward a social theory of geographic information
B.S. Poore, N.R. Chrisman
2006, Annals of the Association of American Geographers (96) 508-523
In the so-called Information Age, it is surprising that the concept of information is imprecisely defined and almost taken for granted. Historic and recent geographic information science (GIScience) literature relies on two conflicting metaphors, often espoused by the same author in adjacent paragraphs. The metaphor of invariance, derived from telecommunications...
The ionospheric impact on GPS performance in southern polar region
C.-K. Hong, D. A. Grejner-Brzezinska, N. Arslan, M. Willis, L. Hothem
2006, Conference Paper, Proceedings of the Institute of Navigation - 19th International Technical Meeting of the Satellite Division, ION GNSS 2006
The primary objective of this paper is to present the results of the study of the effects of varying ionospheric conditions on the GPS signal tracking in the southern polar region. In the first stage of this study, the data collected by the OSU/USGS team in October-November 2003 within the...
Occurrence and fate of organic contaminants during onsite wastewater treatment
K.E. Conn, L. B. Barber, G.K. Brown, R.L. Siegrist
2006, Environmental Science & Technology (40) 7358-7366
Onsite wastewater treatment systems serve approximately 25% of the U.S. population. However, little is known regarding the occurrence and fate of organic wastewater contaminants (OWCs), including endocrine disrupting compounds, during onsite treatment. A range of OWCs including surfactant metabolites, steroids, stimulants, metal-chelating agents, disinfectants, antimicrobial agents, and...
Anomalous postcritical refraction behavior for certain transversely isotropic media
L. Fa, R.L. Brown, J.P. Castagna
2006, Journal of the Acoustical Society of America (120) 3479-3492
Snell's law at the boundary between two transversely isotropic media with a vertical axis of symmetry (VTI media) can be solved by setting up a fourth order polynomial for the sine of the reflection/transmission angles. This approach reveals the possible presence of an anomalous postcritical angle for certain transversely isotropic...
Inhibition of coral recruitment by macroalgae and cyanobacteria
I. B. Kuffner, L.J. Walters, M.A. Becerro, V.J. Paul, R. Ritson-Williams, K.S. Beach
2006, Marine Ecology Progress Series (323) 107-117
Coral recruitment is a key process in the maintenance and recovery of coral reef ecosystems. While intense competition between coral and algae is often assumed on reefs that have undergone phase shifts from coral to algal dominance, data examining the competitive interactions involved, particularly during the larval and immediate post-settlement...
Description of the adults of Maccaffertium lenati (Ephemeroptera: Heptageniidae), notes on its ecology and distribution, and a new North Carolina record for Isonychia arida (Ephemeroptera: Isonychiidae)
B.C. Kondratieff, R.E. Zuellig, D. R. Lenat
2006, Proceedings of the Entomological Society of Washington (108) 995-997
[No abstract available]...
Trends in summer chemistry linked to productivity in lakes recovering from acid deposition in the Adirondack region of New York
B. Momen, G.B. Lawrence, S. A. Nierzwicki-Bauer, J.W. Sutherland, L.W. Eichler, J.P. Harrison, C.W. Boylen
2006, Ecosystems (9) 1306-1317
The US Environmental Protection Agency established the Adirondack Effects Assessment Program (AEAP) to evaluate and monitor the status of biological communities in lakes in the Adirondack region of New York that have been adversely affected by acid deposition. This program includes chemical analysis of 30 lakes, sampled two to three...
Testing the concept of drift shadow at Yucca Mountain, Nevada
J.B. Paces, L.A. Neymark, T. Ghezzehei, P.F. Dobson
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
If proven, the concept of drift shadow, a zone of reduced water content and slower ground-water travel time beneath openings in fractured rock of the unsaturated zone, may increase performance of a proposed geologic repository for high-level radioactive waste at Yucca Mountain, To test this concept under natural-flow conditions present...
Tracer test with As(V) under variable redox conditions controlling arsenic transport in the presence of elevated ferrous iron concentrations
R. Hohn, M. Isenbeck-Schroter, D.B. Kent, J.A. Davis, R. Jakobsen, S. Jann, V. Niedan, C. Scholz, S. Stadler, A. Tretner
2006, Journal of Contaminant Hydrology (88) 36-54
To study transport and reactions of arsenic under field conditions, a small-scale tracer test was performed in an anoxic, iron-reducing zone of a sandy aquifer at the USGS research site on Cape Cod, Massachusetts, USA. For four weeks, a stream of groundwater with added As(V) (6.7 μM) and bromide...
Guideline for assessing the performance of electric power systems in natural hazard and human threat events
W.U. Savage, S.P. Nishenko, D.G. Honegger, L. Kempner Jr.
2006, Conference Paper, Electrical Transmission Line and Substation Structures: Structural Reliability in a Changing World - Proceedings of the 2006 Electrical Transmission Conference
Electric power utilities are familiar with and skilled in preparing for and responding to almost-routine natural hazard events such as strong wind and ice storms and seasonal floods, as well as intentional human acts such as vandalism. Recent extreme weather (hurricanes Katrina and Rita), extremely destructive international earthquakes (in Sumatra...
Prediction and discovery of new geothermal resources in the Great Basin: Multiple evidence of a large undiscovered resource base
M.F. Coolbaugh, G. L. Raines, R. E. Zehner, L. Shevenell, C.F. Williams
2006, Conference Paper, Transactions - Geothermal Resources Council
Geothermal potential maps by themselves cannot directly be used to estimate undiscovered resources. To address the undiscovered resource base in the Great Basin, a new and relatively quantitative methodology is presented. The methodology involves three steps, the first being the construction of a data-driven probabilistic model of the location of...
Riverine movements of adult Lost River, shortnose, and Klamath largescale suckers in the Williamson and Sprague rivers, Oregon. Annual report 2004
T.J. Tyler, C.M. Ellsworth, S. P. VanderKooi, R.S. Shively
2006, Report
n/a...
A note on the correlation between geophysical observations and seismicity in the Arava/(Araba) Valley at the southern part of the Dead Sea fault
M. Rybakov, A. Shapira, A. Al-Zoubi, Uri S. ten Brink, R. Hofstetter, N. Kraeva, L. Feldman
2006, Israel Journal of Earth Sciences (55) 173-183
The spatial distribution of the earthquakes in the Arava Valley, a 150-km section of the Dead Sea Transform, is compared for the first time with the local subsurface geological features derived from geophysical and geological data. Gravity data suggested that the Gharandal, Timna, and Elat basins were filled by low-density...
Mineral mapping and applications of imaging spectroscopy
R. N. Clark, J. Boardman, J. Mustard, F. Kruse, C. Ong, C. Pieters, G.A. Swayze
2006, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
Spectroscopy is a tool that has been used for decades to identify, understand, and quantify solid, liquid, or gaseous materials, especially in the laboratory. In disciplines ranging from astronomy to chemistry, spectroscopic measurements are used to detect absorption and emission features due to specific chemical bonds, and detailed analyses are...
What is science?
D.L. Shrake, L.E. Elfner, W. Hummon, R.W. Janson, M. Free
2006, Ohio Journal of Science (106) 130-135
In 2000 The Ohio Academy of Science published its definition of "Science." Response to this definition led the Academy to produce a position paper entitled What is Science? The Academy officially adopted the position paper version of What is Science?, http: //www.ohiosci.org/ Whatisscience.pdf, at the April 2004 Ohio Academy of...
Adsorption site analysis of impurity embedded single-walled carbon nanotube bundles
S. Agnihotri, J.P.B. Mota, M. Rostam-Abadi, M.J. Rood
2006, Carbon (44) 2376-2383
Bundle morphology and adsorptive contributions from nanotubes and impurities are studied both experimentally and by simulation using a computer-aided methodology, which employs a small physisorbed probe molecule to explore the porosity of nanotube samples. Grand canonical Monte Carlo simulation of nitrogen adsorption on localized sites of a bundle is carried...
Does life history predict risk-taking behavior of wintering dabbling ducks?
Joshua T. Ackerman, J.M. Eadie, T.G. Moore
2006, Condor (108) 530-546
Life-history theory predicts that longer-lived, less fecund species should take fewer risks when exposed to predation than shorter-lived, more fecund species. We tested this prediction for seven species of dabbling ducks (Anas) by measuring the approach behavior (behavior of ducks when approaching potential landing sites) of 1099 duck flocks during...
