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Discovery of Two T Dwarf Companions with the Spitzer Space Telescope
We report the discovery of T dwarf companions to the nearby stars HN Peg (G0 V, 18.4 pc, τ ~ 0.3 Gyr) and HD 3651 (K0 V, 11.1 pc, τ ~ 7 Gyr). During an ongoing survey of 5' × 5' fields surroundingExpand
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Applied geophysical inversion
TLDR
We propose an inversion algorithm which, given an arbitrary starting model and the absence of any data, will produce a preconceived earth model and then introduce the observed data into the inversion to determine how the model is influenced by the supplementary geophysical data. Expand
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Generalized subspace methods for large-scale inverse problems
SUMMARY Numerical efficiency and efficacy of subspace methods for solving large-scale geophysical inverse problems are investigated. The primary advantage of subspace techniques over traditionalExpand
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Three-dimensional regularized focusing inversion of gravity gradient tensor component data
We develop a new method for interpretation of tensor gravity field component data, based on regularized focusing inversion. The focusing inversion makes its possible to reconstruct a sharper image ofExpand
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Calculation of sensitivities for the frequency-domain electromagnetic problem
SUMMARY A simple derivation is presented for the computation of sensitivities needed to solve parametric inverse problems in electromagnetic induction. It is shown that ~en­ sitivities for anyExpand
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North American Central Plains conductivity anomaly within the Trans-Hudson orogen in northern Saskatchewan, Canada
Magnetotelluric data acquired across the Paleoproterozoic Trans-Hudson orogen, northern Saskatchewan, image one of the world9s longest crustal features, the North American Central Plains conductivityExpand
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Methods for the control of large medium voltage motors; application considerations and guidelines
Starting and control methods available for medium voltage induction motors, (2.4 kV-7.2 kV), in the petrochemical industry are continually changing in terms of application considerations due to theExpand
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Magnetic Vector Inversion , a simple approach to the challenge of varying direction of rock magnetization
Modern conventional magnetic surveys used in exploration measure the intensity of the total magnetic field (TMI). After subtracting the intensity of the modelled International Geomagnetic ReferenceExpand
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Efficient inversion of magnetotelluric data in two dimensions
Abstract Two algorithms are presented to invert magnetotelluric data over 2D conductivity structures. Both algorithms use approximate sensitivities that arise from the 1D conductivity profile beneathExpand
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Flowering plants of Wales
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