Search Results - "Johnson, Walter R."
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A measurement of the equation of state of carbon envelopes of white dwarfs
Published in Nature (London) (06-08-2020)“…White dwarfs represent the final state of evolution for most stars 1 – 3 . Certain classes of white dwarfs pulsate 4 , 5 , leading to observable brightness…”
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Statistics of Extremes in Oil Spill Risk Analysis
Published in Environmental science & technology (02-09-2014)“…The Deepwater Horizon oil spill (DWH) in 2010 in the Gulf of Mexico is the largest accidental marine oil spill in the history of the petroleum industry. After…”
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Black-body radiation shifts and theoretical contributions to atomic clock research
Published in IEEE transactions on ultrasonics, ferroelectrics, and frequency control (01-01-2010)“…A review of theoretical calculations of black-body radiation (BBR) shifts in various systems of interest to atomic clock research is presented. Calculations…”
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Preliminary assessment of an oil-spill trajectory model using satellite-tracked, oil-spill-simulating drifters
Published in Environmental modelling & software : with environment data news (01-02-2006)“…Ninety-seven oil-spill-simulating drifters were deployed over the continental shelf of the northeastern Gulf of Mexico during five hydrographic surveys…”
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Electron impact ionization in dense plasmas
Published in High energy density physics (01-12-2024)“…The distorted-wave with exchange (DWE) method is employed to evaluate electron impact ionization cross sections in dense electron–ion plasmas. Bound and…”
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Overview of the Oil Spill Risk Analysis (OSRA) Model for Environmental Impact Assessment
Published in Spill science & technology bulletin (01-01-2003)“…The oil spill risk analysis (OSRA) model is an environmental impact assessment tool, producing estimates of the probabilities of oil spill occurrence and…”
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Progress of the Oil Spill Risk Analysis (OSRA) Model and Its Applications
Published in Journal of marine science and engineering (01-02-2021)“…The Bureau of Ocean Energy Management (BOEM) is responsible for managing the development of US Outer Continental Shelf (OCS) energy and mineral resources…”
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Role of opacity at the 9 keV back lighter energy used in measuring the equation of state of boron at pressures up to a Gbar
Published in High energy density physics (01-11-2020)“…Many experiments have been conducted at the National Ignition Facility to measure the equation of state Hugoniot of plastic, boron, and diamond at extreme…”
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Prediction and observation of tin and silver plasmas with index of refraction greater than one in the soft x-ray range
Published in Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics (01-07-2006)“…We present the calculated prediction and the experimental confirmation that doubly ionized Ag and Sn plasmas can have an index of refraction greater than one…”
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The effect of bound states on X-ray Thomson scattering for partially ionized plasmas
Published in High energy density physics (01-09-2013)“…X-ray Thomson scattering is being developed as a method to measure the temperature, electron density, and ionization state of high energy density plasmas such…”
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Oil Spill Risk Analysis Model and Its Application to the Deepwater Horizon Oil Spill Using Historical Current and Wind Data
Published in Monitoring and Modeling the Deepwater Horizon Oil Spill (2011)“…This chapter contains sections titled: Introduction Osra Model Modeling Potential Oil Spills in the Gom Summary and Conclusions…”
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Book Chapter -
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Average-atom treatment of relaxation time in X-ray Thomson scattering from warm-dense matter
Published 01-04-2016“…Phys. Rev. E 93, 033205 (2016) The influence of finite relaxation times on Thomson scattering from warm-dense plasmas is examined within the framework of the…”
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Impact of anomalous dispersion on the interferometer measurements of plasmas
Published in Journal of quantitative spectroscopy & radiative transfer (01-05-2006)“…For many decades optical interferometers have been used to measure the electron density of plasmas. During the last ten years X-ray lasers in the wavelength…”
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Sensitivity testing for improved efficiency of a statistical oil-spill risk analysis model
Published in Environmental modelling & software : with environment data news (01-07-2004)“…The US Minerals Management Service performs oil-spill risk analyses using, in part, a statistical model of hypothetical oil-spill trajectories. The “Oil-spill…”
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Understanding the anomalous dispersion of doubly ionized carbon plasmas near 47 nm
Published in High energy density physics (01-10-2008)“…Over the last several years we have predicted and observed plasmas with an index of refraction greater than 1 in the soft X-ray regime. These plasmas are…”
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Understanding the anomalous dispersion of doubly ionized carbon plasmas near 47nm
Published in High energy density physics (01-10-2008)Get full text
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Inventive Genius of America
Published in Scientific American (09-06-1849)“…This is a condensed review of a lecture by Mr. Johnson delivered before the Maryland Institue for promoting the Mechanic Arts…”
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The northeastern Chukchi Sea: benthos-environmental interactions
Published in Marine ecology. Progress series (Halstenbek) (1994)“…Benthic faunal abundance, diversity, and biomass were examined in the northeastern Chukchi Sea to determine factors influencing faunal distribution. Four…”
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Equation of state of warm-dense boron nitride combining computation, modeling, and experiment
Published 02-02-2019“…Phys. Rev. B 99, 165103 (2019) The equation of state (EOS) of materials at warm dense conditions poses significant challenges to both theory and experiment. We…”
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