A5036751558- Astro and Planetary Science
- Planetary Science and Exploration
- Ionosphere and magnetosphere dynamics
- Monetary Policy and Economic Impact
- Magnetic confinement fusion research
- Economic Theory and Policy
- Global Financial Crisis and Policies
- Space Exploration and Technology
- Solar and Space Plasma Dynamics
- Inertial Sensor and Navigation
- Isotope Analysis in Ecology
- Laser-Plasma Interactions and Diagnostics
- Digital Games and Media
- Fusion materials and technologies
- Geomagnetism and Paleomagnetism Studies
- Scientific Research and Discoveries
- Lightning and Electromagnetic Phenomena
- Economic, financial, and policy analysis
- Complex Systems and Time Series Analysis
- Nonlinear Photonic Systems
- Aerosol Filtration and Electrostatic Precipitation
- Economic Policies and Impacts
- Shakespeare, Adaptation, and Literary Criticism
- American and British Literature Analysis
- Plasma Diagnostics and Applications
United States Air Force Academy
2025
University of Montana
2006-2010
University of Iowa
2005-2006
National Bureau of Economic Research
2003
Federal Reserve Bank of San Francisco
2003
Federal Reserve Board of Governors
2003
University of San Francisco
2003
Columbia University
2001-2002
Federal Communications Commission
1974
Federal Reserve
1974
A survey of the bulk plasma ion properties observed by Cassini Plasma Spectrometer instrument over roughly first 4.5 years its mission in orbit around Saturn is presented. The moments (density, temperature, and flow velocity) distributions below 50 keV have been computed numerical integration counts “Singles” (non‐mass‐resolved) data, partitioned into species on basis concurrent determinations composition from time‐of‐flight data. Moments are presented for three main species: H + , W (water...
view Abstract Citations (19) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A Method for the Determination of Stellar Diameters. Williams, J. D. It has been suggested at various times that angular diameter a star may be deduced from study its light-curve while it is undergoing occultation by moon; but Eddington shown observation geometrical almost hopelessly complicated diffraction effects, except stars very large diameter. The present paper...
We present an analysis of molecular oxygen ion (O 2 + ) abundance in Saturn's inner magnetosphere based on observations made with the Cassini Plasma Spectrometer (CAPS). Using data summed over 23 orbits, we resolve and isolate O counts from tail water group mass distribution (W [O , OH H 3 ]) background sources. was initially estimated at ∼1–2% total population CAPS Saturn orbital insertion pass. Through refined techniques, have found to account for just above 0.3% all W ions L = 4.5, only...
We report observations of electric field solitary structures, measured by the Cassini Radio and Plasma Wave Science (RPWS) instrument in vicinity Saturn's magnetosphere with ambient magnetic fields that range from ∼0.1 nT to 8000 nT. The peak‐to‐peak amplitudes observed structures a few μV/m 10 mV/m show slight trend toward larger amplitude pulses being associated fields. time durations hundred μs 10's milliseconds. waves appear plasma boundary regions or abrupt changes field. tend be when...
We document the presence of solitary structures in electric field, measured by Cassini plasma wave instrument at an interplanetary shock associated with October/November 2003 solar flares. The occurrence frequency electrostatic waves increases prior to and during passage initial boundary but decreases almost zero post‐shock environment. field amplitudes are on order a few tens μV/m, while characteristic scale size is estimated be ∼500 Debye lengths. potentials ∼0.5 V both upstream downstream...
A sound assessment of hydrologic and erosional responses in wildland agricultural ecosystems to rainfallrequires that rainfall simulators mimic natural rainfall. The accuracy usefulness the improves withincreased similarity between simulated Some characteristics important rainfallsimulation include energy, intensity, distribution, drop size time or season application, plotsize. Our purpose for constructing a new simulator was improve an old design with current technology. Thisequipment is...
A novel method to calculate the neoclassical radial electric field in stellarator plasmas is described. The method, which does not have inconvenience of large statistical fluctuations (noise) standard Monte Carlo technique, based on variation combined parallel and perpendicular pressures a magnetic surface. Using three-dimensional gyro-kinetic δf code, calculation (Er) National Compact Stellarator Experiment [G. H. Neilson et al., Phys. Plasmas 7, 1911 (2000)] has been carried out. It shown...
view Abstract Citations (3) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Relative Frequencies of Meteors. Williams, J. D. On the assumption that number meteors increases lpgarithmically with their magnitudes, base K is evaluated from a series binocular observations by method maximum likelihood. The reliability value so found, 2.08, discussed, following which an estimate made space density meteoric material Publication: Astrophysical Journal Pub...
Dr. Williams is Associate Professor of Finance at The University Akron. He holds an MBA and a DBA from Kent State the author several articles in area Financial Management. Rakich Management Ph. D. St. Louis has compiled one book, published articles, spoken extensively Hospital Administration. Both are 1973 AACSB Federal Faculty Fellows on leave former with Communications Commission latter Department Health, Education, Welfare.
Abstract. A sounding rocket, equipped to study pulsating aurora launched from Poker Flat, Alaska on 13 March 1997 at 10:20:31 UT, measured electron precipitation over the range ~10 eV 500 keV covering pitch-angles 0 180°. Data show electrons with energies <1 are mostly secondaries produced below rocket altitude by higher energy precipitated electrons. We observed nearly equal fluxes of up and down going for altitudes 265 380 km. Electron transport simulation results indicate more...
In this paper, the case of rotation damping for plasmas that lack perfect symmetry is studied. Results from a δf Monte Carlo code are used to calculate damping. The method has proven greatly improve efficiency computing distribution function fusion compared standard techniques. A developed improves upon by combining results kinetic simulation with single-fluid force-balance equation.
Consider the $\mathcal{B}$-valued probability space $(\mathcal{A}, E, \mathcal{B})$, where $\mathcal{A}$ is a tracial von Neumann algebra. We extend theory of operator valued free to algebra affiliated operators $\tilde{\mathcal{A}}$. For random variable $X \in \tilde{\mathcal{A}}^{sa}$ we study Cauchy transform $G_{X}$ and show that $(\mathcal{B} \cup \{X\})"$ can be recovered from this function. In case $\mathcal{B}$ finite dimensional, that, when $X, Y are assumed $\mathcal{B}$-free,...