Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Janet E. Simms"'
Publikováno v:
Symposium on the Application of Geophysics to Engineering and Environmental Problems 2021.
Autor:
Janet E. Simms, Benjamin R. Breland
Publikováno v:
Symposium on the Application of Geophysics to Engineering and Environmental Problems 2021.
Autor:
Stephen A. Ketcham, Heidi M. Wadman, R. Daniel Costley, Janet E. Simms, Michael W. Parker, Kent K. Hathaway, William R. Folks, Eric W. Smith, Clay K. Kirkendall, Gustavo Galan-Comas, Troy W. Milburn
Publikováno v:
Journal of Environmental and Engineering Geophysics. 23:183-195
Experiments were performed comparing the response of fiber optic distributed acoustic sensing (DAS) to vertical geophones installed on the surface. The DAS consisted of an optical interrogator attached to an optical fiber. The fiber was part of an op
Autor:
Hollis H. Bennett, Janet E. Simms, John B. Sigman, Fridon Shubitidze, Yinlin Wang, Kevin O'Neill, Donald E. Yule, Benjamin E. Barrowes
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 55:5254-5263
We introduce a frequency-domain electromagnetic induction (EMI) instrument for detection and classification of objects with either high ( $\sigma > 10^{5}~\textrm {S/m}$ ) or intermediate ( $1 ) electrical conductivity. While high conductivity metall
Publikováno v:
Journal of Environmental & Engineering Geophysics. 22:209-221
A ground penetrating radar (GPR) and root excavation study were conducted to determine the efficacy of GPR for estimating subsurface tree root volume. The survey was conducted in sandy soil, which is favorable for GPR imaging. The tree was a loblolly
Autor:
John B. Sigman, Donald E. Yule, Benjamin E. Barrowes, Fridon Shubitidze, Kevin O'Neill, Janet E. Simms, Hollis H. Bennett
Publikováno v:
Journal of Environmental and Engineering Geophysics. 22:111-120
The U.S. military has developed and currently uses composite material munitions. These composite munitions are typically comprised of carbon fiber and, because of their low electrical conductivity, have a much lower electromagnetic induction signatur
Autor:
Kevin D. Hutchenson, Ray B. Conner, Don E. Yule, Lars B. Johnson, Janet E. Simms, Hollis H. Bennett
Publikováno v:
Journal of Environmental and Engineering Geophysics. 20:89-100
For the past several years, Quantum Technology Sciences (QTSI) and U.S. Army Engineering Research and Development Center (ERDC) have been developing a system to actively sustain present and future artillery ranges at zero unexploded ordnance (UXO) ga
Autor:
Benjamin E. Barrowes, Janet E. Simms, Hollis J. Bennett, Kevin O'Neill, Don E. Yule, Yinlin Wang, Steven L. Larson, John B. Sigman, Fridon Shubitidze
Publikováno v:
SPIE Proceedings.
Depleted uranium (DU) is a byproduct of the uranium enrichment process and contains less than 0.3 % of the radioactive U-235 isotope. Since, the natural uranium has about 0.72 % of the uranium U-235 isotope, the enrichment produces large quantities o
Autor:
Janet E. Simms, Kevin O'Neill, John B. Sigman, Fridon Shubitidze, Donald E. Yule, Benjamin E. Barrowes, Hollis J. Bennett, Yinlin Wang
Publikováno v:
SPIE Proceedings.
Intermediate electrical conductivity (IEC, 100-105 S/m) objects are increasingly important to properly detect and classify. For the US Military, carbon fiber (CF) "smart bomb" unexploded ordnance (UXO) are contaminating training ranges. Home-made exp