Search Results - "Cowan, R. D."

Filtering using variable order vertical derivatives by Cooper, G.R.J, Cowan, D.R

“…Vertical derivatives of aeromagnetic and gravity datasets are routinely used as an aid to the interpretation process because they enhance detail and sharpen…”
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Terracing potential field data by Cooper, G.R.J., Cowan, D.R.

“…ABSTRACT Terracing is an operator that is applied to potential field data to produce regions of constant field amplitude that are separated by sharp…”
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A generalized derivative operator for potential field data by Cooper, G.R.J., Cowan, D.R.

“…ABSTRACT The enhancement of potential field data using filters based on horizontal and vertical derivatives is common. As well as the direct use of the…”
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Differential reduction to the pole by Cooper, G.R.J., Cowan, D.R.

“…Due to the dipolar nature of the geomagnetic field, magnetic anomalies located anywhere other than at the magnetic poles are asymmetric even when the magnetic…”
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Enhancing potential field data using filters based on the local phase by Cooper, G.R.J., Cowan, D.R.

“…Measures of the local phase of potential fields can be a useful aid to their interpretation. There are several variations in use, such as the tilt angle, tilt…”
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Comparing time series using wavelet-based semblance analysis by Cooper, G.R.J., Cowan, D.R.

“…Similarity measures are becoming increasingly commonly used in comparison of multiple datasets from various sources. Semblance filtering compares two datasets…”
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The use of textural analysis to locate features in geophysical data by Cooper, G.R.J., Cowan, D.R.

“…Textural analysis is a powerful tool, but it is rarely applied to geophysical potential field data because the results are often noisy and ambiguous. New…”
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Theoretical and experimental lifetime and oscillator strength determination in singly ionized neodymium (Nd ii) by Xu, H. L., Svanberg, S., Cowan, R. D., Lefèbvre, P.-H., Quinet, P., Biémont, E.

“…Radiative lifetime measurements were performed with time-resolved laser-induced fluorescence techniques for 24 levels of Nd ii in the energy range 20 500–32…”
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Nonlinear analysis of barge crush behavior and its relationship to impact resistant bridge design by Consolazio, Gary R., Cowan, David R.

“…Bridge structures crossing navigable waterways must not only be designed to resist gravity, wind, and earthquake loads, but must also be capable of resisting…”
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Enhancing linear features in image data using horizontal orthogonal gradient ratios by Cooper, G.R.J., Cowan, D.R.

“…Horizontal directional derivatives and sunshading are two commonly used gradient-based filters for enhancing linear features in potential field data. The Tilt…”
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Software engineering technology watch by Cowan, R.D., McKendall, Alan, Mili, Ali, Yang, L., Wang, L., Chen, D., Janardhana, V., Spencer, T.

“…Predicting the evolution of software engineering technology is, at best, a dubious proposition; most typically, it is a frustrating exercise in disappointment…”
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Simple estimates of atomic negative ion structures by Cowan, R D, Wilson, M

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Merging radiometric grids using histogram matching by Cowan, D.R., Cooper, G.R.J.

“…Large-scale compilations of airborne geophysical data are an important part of regional-scale mineral exploration and in most cases, the compilation involves…”
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Sunshading geophysical data using fractional order horizontal gradients by Cooper, G. R. J, Cowan, D. R

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The detection of circular features in irregularly spaced data by Cooper, G.R.J, Cowan, D.R

“…Geophysical potential field data are usually interpolated onto a regular grid before data enhancement and interpretation. Unfortunately the inherent smoothing…”
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On the calculation of electron atom collision processes using exterior complex dilated S-matrix expansions by Carlsund, C, Krylstedt, P, Elander, N, Cowan, R D

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Opaque mineralogy and magnetic properties of selected banded iron-formations, Hamersley Basin, Western Australia by Tompkins, L. A., Cowan, D. R.

“…The oxide mineralogy and rock magnetic properties of unmineralised banded iron-formations in selected portions of four drillholes in the Hamersley Basin,…”
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Atomic structure calculations involving optimization of radial integrals: energy levels and oscillator strengths for Fe XII and Fe XIII 3p–3d and 3s–3p transitions by Bromage, G. E., Cowan, R. D., Fawcett, B. C.

“…Energy levels and oscillator strengths are calculated for the $3s^2\enspace 3p^q-3s^2\enspace 3p^{q-1}\enspace3d$ and $3s^2\enspace 3p^q-3s\enspace 3p^{q+1}$…”
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Bulimia and anorexia nervosa in dental and dental hygiene curricula by Gross, K B, Mayberry, W E, Feil, P H, Cowan, R D

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Inner-shell satellite transitions in dense short pulse plasmas by Rosmej, F.B., Faenov, A.Ya, Pikuz, T.A., Flora, F., DI Lazzaro, P., Bollanti, S., Lisi, N., Letardi, T., Reale, A., Palladino, L., Batani, D., Bossi, S., Bornardinello, A., Scafati, A., Reale, L., Zigler, A., Fraenkel, M., Cowan, R.D.

“…Soft x-ray spectra originating from dense plasmas, generated by a laser irradiating a solid target with ns- and fs- laser pulses, have been obtained with…”
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