James D. Phillips

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Geomorphic systems are typically nonlinear, owing largely to their threshold-dominated nature (but due to other factors as well). Nonlinear geomorphic systems may exhibit complex behaviors not possible in linear systems, including dynamical instability and deterministic chaos. The latter are common in geomorphology, indicating that small, short-lived(More)
The gravity method was the first geophysical technique to be used in oil and gas exploration. Despite being eclipsed by seismology, it has continued to be an important and sometimes crucial constraint in a number of exploration areas. In oil exploration the gravity method is particularly applicable in salt provinces, overthrust and foothills belts,(More)
Metrology and pointing will be enabling technologies for a new generation of astronomical missions having large and distributed apertures and delivering unprecedented performance. The UV interferometer Stellar Imager would study stellar dynamos by imaging magnetic activity on the disks of stars in our Galaxy. The X-ray interferometer Black Hole Imager would(More)
The gravitational acceleration of antimatter, ¯ g, has never been directly measured and could bear importantly on our understanding of gravity, the possible existence of a fifth force, and the nature and early history of the universe. Only two avenues for such a measurement appear to be feasible: antihydrogen and muonium. The muonium measurement requires a(More)
Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Papers published in Hydrology and Earth System Sciences Discussions are under open-access review for the journal Hydrology and Earth System Sciences Abstract Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Printer-friendly Version Interactive(More)
In order to increase the energy resolution in XRF devices, it is necessary to use crystal-based spectrometers. We suggest a von Hamos scheme[1] of the spectrometer for this purpose. This type of spectrometer has the following definite advantages over other focusing schemes: high efficiency in a wide spectral range (or energy range); high spectral resolution(More)
There has long been discussion as to the relative merits of the lithium formulations available in the UK. Two of these have been shown to exhibit similar pharmacokinetics in normal volunteers and both are now marketed as controlled release formulations. In this study the serum lithium profiles of these formulations were compared in patients at two centres(More)
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