R.J. Lytle
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View article: UA68/18/3 Women's Studies Marketing Research
UA68/18/3 Women's Studies Marketing Research Open
Marketing study prepared for Jimmie Price and Dawn Bolton early in the development of WKU's Women's Studies program.
View article: ELF-VLF Communications through the Earth Project report for calendar year 1984. Revision 1
ELF-VLF Communications through the Earth Project report for calendar year 1984. Revision 1 Open
We use computer models and experiments to explore the feasibility of communication between points underground and on the Earth's surface. Emphasis is placed on ELF-VLF electromagnetic propagation through the Earth; nominally, we investigat…
View article: Brief overview of geophysical probing technology
Brief overview of geophysical probing technology Open
An evaluation of high-resolution geophysical techniques which can be used to characterize a nulcear waste disposal site is being conducted by the Lawrence Livermore National Laboratory (LLNL) at the request of the US Nuclear Regulatory Com…
View article: Geotomography applied at the Stripa Mine in Sweden
Geotomography applied at the Stripa Mine in Sweden Open
LLNL made ultrahigh-frequency (450-MHz) electromagnetic borehole-to-borehole transmissions in the Stripa Mine near Guldsmedshyttan, Sweden, in April 1979. Transmission loss measurements were made between four sets of 76-mm boreholes 30 m l…
View article: Fluid-flow monitoring using electromagnetic probing
Fluid-flow monitoring using electromagnetic probing Open
High-frequency electromagnetic probing is used to monitor the rate and direction of flow of fluids injected into the ground. This method shows the potential for providing more detailed information than procedures presently used. The experi…
View article: Analytical bases for electromagnetic sensing of coal properties
Analytical bases for electromagnetic sensing of coal properties Open
A number of theoretical problems have been studied that are relevant to the electromagnetic probing of the environment in coal mines. Particular emphasis was given to methods of determining the roof structures in underground workings. Esse…
View article: Impedance camera: a system for determining the spatial variation of electrical conductivity
Impedance camera: a system for determining the spatial variation of electrical conductivity Open
A data collection and data interpretation method is presented for predicting, from measurements made on the periphery of the core sample, the electrical conductivity distribution within core samples. This method uses an array of electrodes…
View article: Temperature-profile determination using frequency-domain reflectometry
Temperature-profile determination using frequency-domain reflectometry Open
The temperature distribution along a coaxial electrical cable can be determined by means of frequency-domain reflectometry if the cable has an inner sheath of a suitable temperature-sensitive dielectric material. Such a technique would hav…
View article: Determining the natural frequencies of spheroids via the boundary-value problem formulation
Determining the natural frequencies of spheroids via the boundary-value problem formulation Open
Equations by which one can determine the natural frequencies of prolate and oblate spheroids are derived using the boundary-value-problem approach.Both transverse magnetic and transverse electric excitations are considered.Numerical result…
View article: Coal fracture measurements using in situ electrical methods: preliminary results
Coal fracture measurements using in situ electrical methods: preliminary results Open
Examination of cores taken after the blast showed moderate to heavy fracturing in the upper few feet of the coal bed, then a lesser fractured zone in the middle, and a highly pulverized zone at the bottom 5-10 ft of the coal bed. Correspon…
View article: Three-dimensional subsurface delineation via a novel method for determining the subsurface electrical profile
Three-dimensional subsurface delineation via a novel method for determining the subsurface electrical profile Open
the linear set of equations. The need to develop a suitable linear equation solver, with respect to minimization of computer storage and execution costs, particularly for large (three-dimensional) finite element problems, is also discussed.
View article: Measurement of earth medium electrical characteristics: techniques, results, and applications
Measurement of earth medium electrical characteristics: techniques, results, and applications Open
An overview of measurement techniques, measurement results, and factors influencing the conductivity and dielectric constant of earth medium is given. Application of these measurement techniques to geophysical investigations is also discus…
View article: Solutions of the scalar Helmholtz equation in the elliptic cylinder coordinate system
Solutions of the scalar Helmholtz equation in the elliptic cylinder coordinate system Open
A method for determining the eigenvalues for the scalar Helmholtz equation in the elliptic cylinder coordinate system is described. Complex expansion parameters are considered so that numerical results for physical problems involving energ…
View article: Solutions of the scalar Helmholtz equation in the elliptic cylinder coordinate system
Solutions of the scalar Helmholtz equation in the elliptic cylinder coordinate system Open
In this paper we describe a method for determining the eigenvalues for the scalar Helmholtz equation in the elliptic cylinder coordinate system.Complex expansion parameters are considered so that numer ical results for physical problems in…