Search Results - "Roberts, D. A"

Reference dosimetry in magnetic fields: formalism and ionization chamber correction factors by O’Brien, D. J., Roberts, D. A., Ibbott, G. S., Sawakuchi, G. O.

“…Purpose: Magnetic resonance imaging–guided radiotherapy (MRIgRT) provides superior soft-tissue contrast and real-time imaging compared with standard…”
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Spectral Exponents of Kinetic and Magnetic Energy Spectra in Solar Wind Turbulence by Podesta, J. J, Roberts, D. A, Goldstein, M. L

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Retrieval techniques for airborne imaging of methane concentrations using high spatial and moderate spectral resolution: application to AVIRIS by Thorpe, A. K, Frankenberg, C, Roberts, D. A

“…Two quantitative retrieval techniques were evaluated to estimate methane (CH4) enhancement in concentrated plumes using high spatial and moderate spectral…”
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A PROTON-CYCLOTRON WAVE STORM GENERATED BY UNSTABLE PROTON DISTRIBUTION FUNCTIONS IN THE SOLAR WIND by Wicks, R. T., Alexander, R. L., Stevens, M., III, L. B. Wilson, Moya, P. S., Viñas, A., Jian, L. K., Roberts, D. A., O'Modhrain, S., Gilbert, J. A., Zurbuchen, T. H.

“…ABSTRACT We use audification of 0.092 s cadence magnetometer data from the Wind spacecraft to identify waves with amplitudes nT near the ion gyrofrequency…”
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COMPACT RADIO SOURCES WITHIN 30″ OF SGR A: PROPER MOTIONS, STELLAR WINDS, AND THE ACCRETION RATE ONTO SGR A by Yusef-Zadeh, F., Bushouse, H., Schödel, R., Wardle, M., Cotton, W., Roberts, D. A., Nogueras-Lara, F., Gallego-Cano, E.

“…ABSTRACT Recent broadband 34 and 44 GHz radio continuum observations of the Galactic center have revealed 41 massive stars identified with near-IR (NIR)…”
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Scale-dependent angle of alignment between velocity and magnetic field fluctuations in solar wind turbulence by Podesta, J. J., Chandran, B. D. G., Bhattacharjee, A., Roberts, D. A., Goldstein, M. L.

“…Under certain conditions, freely decaying magnetohydrodynamic (MHD) turbulence evolves in such a way that velocity and magnetic field fluctuations δv and δB…”
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Power spectrum of small-scale turbulent velocity fluctuations in the solar wind by Podesta, J. J., Roberts, D. A., Goldstein, M. L.

“…It is well known that the power spectrum of magnetic field fluctuations in the solar wind exhibits a Kolmogorov spectrum f−α in the inertial range of the…”
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Evaluation of Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and Moderate Resolution Imaging Spectrometer (MODIS) measures of live fuel moisture and fuel condition in a shrubland ecosystem in southern California by Roberts, D. A., Dennison, P. E., Peterson, S., Sweeney, S., Rechel, J.

“…Dynamic changes in live fuel moisture (LFM) and fuel condition modify fire danger in shrublands. We investigated the empirical relationship between…”
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Rapid Intrinsic Variability of SGR A at Radio Wavelengths by Yusef-Zadeh, F, Wardle, M, Miller-Jones, J. C. A, Roberts, D. A, Grosso, N, Porquet, D

“…Sgr A* exhibits flares in radio, millimeter, and submillimeter wavelengths with durations of ~1 hr. Using structure function, power spectrum, and…”
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Green Bank Telescope Observations of IC 443: The Nature of OH (1720 MHz) Masers and OH Absorption by Hewitt, J. W, Yusef-Zadeh, F, Wardle, M, Roberts, D. A, Kassim, N. E

“…We present spectral line observations of the ground-state transitions of hydroxyl (OH) toward supernova remnant (SNR) IC 443 carried out with the Green Bank…”
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QUANTUM DOT OPTO-ELECTRONIC DEVICES by Bhattacharya, P, Ghosh, S, Stiff-Roberts, A D

“…▪ Abstract  Highly strained semiconductors grow epitaxially on mismatched substrates in the Stranski-Krastanow growth mode, wherein islands are formed after a…”
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A VARI-based relative greenness from MODIS data for computing the Fire Potential Index by Schneider, P., Roberts, D.A., Kyriakidis, P.C.

“…The Fire Potential Index (FPI) relies on relative greenness (RG) estimates from remote sensing data. The Normalized Difference Vegetation Index (NDVI), derived…”
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Sources of error in accuracy assessment of thematic land-cover maps in the Brazilian Amazon by Powell, R.L, Matzke, N, de Souza, C, Clark, M, Numata, I, Hess, L.L, Roberts, D.A

“…Valid measures of map accuracy are critical, yet can be inaccurate even when following well-established procedures. Accuracy assessment is particularly…”
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Evaluation of preparative high performance liquid chromatography and cryoprobe-nuclear magnetic resonance spectroscopy for the early quantitative estimation of drug metabolites in human plasma by Dear, G.J., Roberts, A.D., Beaumont, C., North, S.E.

“…Definitive information on the metabolism of a drug candidate in humans is achieved through dosing radiolabelled drug as part of a clinical study, and is…”
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Use of Normalized Difference Water Index for monitoring live fuel moisture by Dennison, P.E, Roberts, D.A, Peterson, S.H, Rechel, J

“…Normalized Difference Vegetation Index (NDVI) and Normalized Difference Water Index (NDWI) were compared for monitoring live fuel moisture in a shrubland…”
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Plasma sheet turbulence observed by Cluster II by Weygand, James M., Kivelson, M. G., Khurana, K. K., Schwarzl, H. K., Thompson, S. M., McPherron, R. L., Balogh, A., Kistler, L. M., Goldstein, M. L., Borovsky, J., Roberts, D. A.

“…Cluster fluxgate magnetometer (FGM) and ion spectrometer (CIS) data are employed to analyze magnetic field fluctuations within the plasma sheet during passages…”
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Magnetohydrodynamic Turbulence in the Solar Wind by Goldstein, M. L, Roberts, D. A, Matthaeus, W. H

“…The fluctuations in magnetic field and plasma velocity in the solar wind possess many features expected of fully developed magnetohydrodynamic turbulence…”
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Resonant infrared matrix-assisted pulsed laser evaporation of CdSe colloidal quantum dot/poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-(1-cyano vinylene)phenylene] hybrid nanocomposite thin films by Pate, R., Lantz, K.R., Stiff-Roberts, A.D.

“…CdSe colloidal quantum dot / poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-(1-cyano vinylene)phenylene] hybrid nanocomposite thin films were deposited using resonant…”
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The Variability of Polarized Radiation from Sagittarius A by Yusef-Zadeh, F, Wardle, M, Cotton, W. D, Heinke, C. O, Roberts, D. A

“…Sgr A is variable at radio and submillimeter wavelengths on hourly timescales, showing time delays between the peaks of flare emission as well as linearly…”
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Syphilitic Hepatitis in HIV-Infected Patients: A Report of 7 Cases and Review of the Literature by Mullick, C. J., Liappis, A. P., Benator, D. A., Roberts, A. D., Parenti, D. M., Simon, G. L.

“…Background. A recent resurgence of primary and secondary syphilis has been observed in certain population groups, particularly among persons infected with…”
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