81,188 research outputs found

    Development of Electronic Data Processing /EDP/ augmented management system

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    To tailor the existing Unified Flight Analysis System to management data rather than technical data, a pilot model could be produced in breadboard form, using electronic data processing, in a matter of a few months at very moderate cost. Such a system lends itself to continuous refinement

    Mojave Applied Ecology Notes Summer 2010

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    Survey of monitoring and management for conservation of rare plants, Roadside restoration techniques in Joshua Tree NP, and an update on renewable energy developments in the Southwestern desert

    Study of radiation effects in Li-doped silicon solar cells

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    Radiation effects in lithium-doped silicon solar cell

    A physiological measure of shifting connections in the Rana pipiens retinotectal system

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    The retinotectal connections of developing Rana tadpoles and froglets have been studied using light-pipe techniques to directly assay the pattern of the projection from the retina to the tectum. The projection site of the retina surrounding the optic nerve head was determined at two different stages of development (late larval and metamorphic frog) on the same animal. Small electrolytic marker lesions were used to mark the tectal sites to which the optic nerve head projected at these two times. Comparison of the positions of the two lesions gives a direct measure of the shift in the projection during the interlesion time interval of one week. The results indicate a shift in the projection of 275 µm week–1 in late larval life. Previous work in Xenopus using the light-pipe techniques indicated a qualitatively similar shift during equivalent stages of development, but significantly smaller in magnitude. In the present study, topographic postsynaptic units could be recorded at all stages investigated, indicating functional synapses between the optic nerve fibres and the tectum. Thus, these studies offer evidence of a significant shift in the functional connection pattern of the amphibian retinotectal map during development, in agreement with the recent anatomical data from other laboratories on the Rana and goldfish visual system

    Classical Functional Bethe Ansatz for SL(N)SL(N): separation of variables for the magnetic chain

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    The Functional Bethe Ansatz (FBA) proposed by Sklyanin is a method which gives separation variables for systems for which an RR-matrix is known. Previously the FBA was only known for SL(2)SL(2) and SL(3)SL(3) (and associated) RR-matrices. In this paper I advance Sklyanin's program by giving the FBA for certain systems with SL(N)SL(N) RR-matrices. This is achieved by constructing rational functions \A(u) and \B(u) of the matrix elements of T(u)T(u), so that, in the generic case, the zeros xix_i of \B(u) are the separation coordinates and the P_i=\A(x_i) provide their conjugate momenta. The method is illustrated with the magnetic chain and the Gaudin model, and its wider applicability is discussed.Comment: 14pp LaTex,DAMTP 94-1
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