Donald MACKAY, L'histoire du CN

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DONALD M . MACKAy AND WARREN

The maximum rate at which a synaptic link could theoretically transmit information depends on the type of coding used. In a binary modulation system it depends chiefly on the relaxation time, and the limiting capacity equals the maximum attainable impulse rate. In a system using pulse-interval modulation, temporal precision may be a more important limiting factor. It is shown that in a number o...

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Mackay Antisymmetry Space Groups

By using the antisymmetry characteristic method implemented in computer programs written in Mathematica 4, from 230 space symmetry groups are derived 1191 Mackay groups of the type M1, 5005 groups of the type M2, 19467 groups of the type M3, 72587 groups of the type M4, 191728 groups of the type M5, and 598752 groups of the type M6. Mackay groups are the minimal representation of Zamorzaev’s mu...

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Trudy Mackay

smoking, or by a combination of the three, and to pack them into barrels for transport. The cod and its relatives hake and haddock, were a different matter and more easily preserved than herring. The pursuit of cod took fishermen much further away. A huge industry developed, centred on Bergen, where ships exchanged dried fish for grain. Archaeological excavations in the Norwegian Lofoten Island...

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And Donald

In 1983, Popper and Miller published in Nature a new argument against inductive probability. There followed, the next year, a discussion of the validity of the argument in the pages of the same journal involving Good, Jeffrey, and Levi as well as Popper and Miller themselves. This has led in turn to still further discussions of the argument. Those who are critical include Redhead (1985) and Dun...

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CN/CN isotope ratio and fractionation

We have detected circumstellar absorption lines of the CN and CN Violet and Red System in the spectrum of the post-AGB star HD 56126. From a synthetic spectrum analysis, we derive a Doppler broadening parameter of b = 0.51 ± 0.04 km s, CN/CN= 38±2, and a lower limit of 2000 on CN/CN and CN/CN. A simple chemical model has been computed of the circumstellar shell surrounding HD 56126 that takes i...

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ژورنال

عنوان ژورنال: Recherches sociographiques

سال: 1994

ISSN: 0034-1282,1705-6225

DOI: 10.7202/056852ar