The Experts below are selected from a list of 228 Experts worldwide ranked by ideXlab platform
Colin Macilwain - One of the best experts on this subject based on the ideXlab platform.
-
Livermore plans radical rescue for mismanaged laser facility
Nature, 2000Co-Authors: Colin MacilwainAbstract:Livermore, CALIFORNIA Bruce Tarter, the director of the Lawrence Livermore National Laboratory in California, will announce a major reorganization of the laboratory aimed to counter criticism that it has mismanaged the construction of a huge laser facility being built there.
-
us sends Livermore laser target chamber to france on loan
Nature, 1999Co-Authors: Colin MacilwainAbstract:[WASHINGTON]The target chamber from the Nova laser experiment at the Lawrence Livermore National Laboratory in California was last week shipped to France, where it will be use as part of a huge new laser facility to be built near Bordeaux.
Robert Schmitt - One of the best experts on this subject based on the ideXlab platform.
-
seismic site characterization of an urban sedimentary basin Livermore valley california site response basin edge induced surface waves and 3d simulations
Bulletin of the Seismological Society of America, 2016Co-Authors: Stephen H Hartzell, Alena L Leeds, Leonardo Ramirezguzman, James P Allen, Robert SchmittAbstract:Thirty‐two accelerometers were deployed in the Livermore Valley, California, for approximately one year to study sedimentary basin effects. Many local and near‐regional earthquakes were recorded, including the 24 August 2014 M w 6.0 Napa, California, earthquake. The resulting ground‐motion data set is used to quantify the seismic response of the Livermore basin, a major structural depression in the California Coast Range Province bounded by active faults. Site response is calculated by two methods: the reference‐site spectral ratio method and a source‐site spectral inversion method. Longer‐period (≥1 s) amplification factors follow the same general pattern as Bouguer gravity anomaly contours. Site response spectra are inverted for shallow shear‐wave velocity profiles, which are consistent with independent information. Frequency–wavenumber analysis is used to analyze plane‐wave propagation across the Livermore Valley and to identify basin‐edge‐induced surface waves with back azimuths different from the source back azimuth. Finite‐element simulations in a 3D velocity model of the region illustrate the generation of basin‐edge‐induced surface waves and point out strips of elevated ground velocities along the margins of the basin. Online Material: Figures comparing 5% damped acceleration response spectra for data and synthetics.
K Surano - One of the best experts on this subject based on the ideXlab platform.
-
Livermore Big Trees Park: 1998 Results
2002Co-Authors: D Mac Queen, G M Gallegos, K SuranoAbstract:This report is an in-depth study of results from environmental sampling conducted in 1998 by the Lawrence Livermore National Laboratory (LLNL) at Big Trees Park in the city of Livermore. The purpose of the sampling was to determine the extent and origin of plutonium found in soil at concentrations above fallout-background levels in the park. This report describes the sampling that was conducted, the chemical and radio-chemical analyses of the samples, the quality control assessments and statistical analyses of the analytical results, and LLNL's interpretations of the results. It includes a number of data analyses not presented in LLNL's previous reports on Big Trees Park.
-
Livermore Big Trees Park: 1998 summary results
1999Co-Authors: G M Gallegos, D Macqueen, K SuranoAbstract:This report summarizes work conducted in 1998 by the Lawrence Livermore National Laboratory (LLNL) to determine the extent and origin of plutonium at concentrations above background levels at Big Trees Park in the city of Livermore. This summary includes the project background and sections that explain the sampling, radiochemical and data analysis, and data interpretation. This report is a summary report only and is not intended as a rigorous technical or statistical analysis of the data.
Dan H Moore - One of the best experts on this subject based on the ideXlab platform.
-
Cutaneous melanoma at Lawrence Livermore National Laboratory: comparison with rates in two San Francisco Bay Area counties
Cancer Causes & Control, 1992Co-Authors: Gail Gong, Alice S. Whittemore, Dee West, Dan H MooreAbstract:During the period 1974 through 1985, employees at Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States) were diagnosed with cutaneous malignant melanoma at approximately three times the rate of the surrounding community. We investigated two explanations for this excess: the first explanation examined was that the recorded incidence of the neighboring community underestimates actual incidence. We estimated the amount of excess attributable to underreporting by using data from a survey conducted among San Francisco Bay Area clinicians and pathologists to determine previously unrecorded occurrences. We found that underreporting has negligible impact on melanoma incidence. The second explanation examined was that heightened medical awareness of the disease among LLNL employees and their physicians has led to greater detection. We found that LLNL melanomas are thinner than those from the surrounding community and that no excess was observed if we limited our attention to thicker, more invasive melanomas.
Stephen H Hartzell - One of the best experts on this subject based on the ideXlab platform.
-
seismic site characterization of an urban sedimentary basin Livermore valley california site response basin edge induced surface waves and 3d simulations
Bulletin of the Seismological Society of America, 2016Co-Authors: Stephen H Hartzell, Alena L Leeds, Leonardo Ramirezguzman, James P Allen, Robert SchmittAbstract:Thirty‐two accelerometers were deployed in the Livermore Valley, California, for approximately one year to study sedimentary basin effects. Many local and near‐regional earthquakes were recorded, including the 24 August 2014 M w 6.0 Napa, California, earthquake. The resulting ground‐motion data set is used to quantify the seismic response of the Livermore basin, a major structural depression in the California Coast Range Province bounded by active faults. Site response is calculated by two methods: the reference‐site spectral ratio method and a source‐site spectral inversion method. Longer‐period (≥1 s) amplification factors follow the same general pattern as Bouguer gravity anomaly contours. Site response spectra are inverted for shallow shear‐wave velocity profiles, which are consistent with independent information. Frequency–wavenumber analysis is used to analyze plane‐wave propagation across the Livermore Valley and to identify basin‐edge‐induced surface waves with back azimuths different from the source back azimuth. Finite‐element simulations in a 3D velocity model of the region illustrate the generation of basin‐edge‐induced surface waves and point out strips of elevated ground velocities along the margins of the basin. Online Material: Figures comparing 5% damped acceleration response spectra for data and synthetics.
