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A B S T R A C T A high-resolution method to image the horizontal boundaries of gravity and magnetic sources is presented (the enhanced horizontal derivative (EHD) method). The EHD is formed by taking the horizontal derivative of a sum of vertical derivatives of increasing order. The location of EHD maxima is used to outline the source boundaries. While for(More)
A new preparation, intestine-mesenteric blood vessels of the rat, was tested for simultaneous measure of noradrenaline (NA) overflow and vasoconstrictor response (delta p) induced by electric stimulations. Control experiments showed that this preparation could be used within a wide range of frequencies and repeatedly stimulated without any important(More)
The problem of finite-size effects in s=1/2 Ising systems showing slow dynamics of the magnetization is investigated introducing diamagnetic impurities in a Co2+-radical chain. The static magnetic properties have been measured and analyzed considering the peculiarities induced by the ferrimagnetic character of the compound. The dynamic susceptibility shows(More)
Several methods are used to upward continue potential field data. The leading techniques employ the Fast Fourier transform, accurate and quick for level-to-level upward continuation, and spatially varying scale filters for level-to-draped surfaces. We propose a new approach, based on the minimum-length solution of the inverse potential field problem. The(More)