منابع مشابه
Neville Fogarty
When we transmit data over a noisy channel (e.g., satellite) to a receiver, we run the risk of our data becoming corrupted. Fixing the channel is not typically an option, so instead we must make our data noise-proof. A naive method of doing this is simply sending the same data multiple times. However, the benefit of the redundancy created may be offset by the cost of sending a lengthy message m...
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Sir.?The aims of your paper in regard to the public health, as set out in your New Year's issue, are excellent. And as everyone seems to be waking up at last to the fact that the housing question overshadows every other question in domestic politics, perhaps something will be accomplished. Questions of housing and health must not, however, be allowed to become the playthings of politics. Every ...
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Shephard groups are common extensions of Artin and Coxeter groups. They appear, for example, in algebraic study of manifolds. An infinite family of Shephard groups which are not Artin or Coxeter groups is considered. Using techniques form small cancellation theory we show that the groups in this family are bi-automatic.
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The long history of both zoological and palaeontological research on the bivalves has revealed a startling degree of convergence and parallel evolution which has hampered the interpretation of their evolutionary history. However new discoveries and developments make it timely for a new concerted effort to integrate zoological and palaeontological techniques to improve comprehension of the evolu...
متن کاملThe Wilson-Wilson Experiment
An example of unipolar induction is a slab of material with (relative) permittivity and (relative) permeability μ that is immersed in a uniform external magnetic field H0 parallel to the plane of the slab, such that if the slab has velocity v perpendicular to H0 but also in the plane of the slab, a nonzero voltage difference V is detected between sliding contacts (fixed in the laboratory) on op...
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ژورنال
عنوان ژورنال: BMJ
سال: 2006
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.333.7567.554-b