Los Alamos Science

Pirmais vāks
The Laboratory, 2002

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153. lappuse - More than any other time in history, mankind faces a crossroads. One path leads to despair and utter hopelessness. The other, to total extinction. Let us pray we have the wisdom to choose correctly.
vii. lappuse - Or does it mean, calculate pedantically and don't ask questions? Neither; the lesson presents itself rather as this, that the past has no existence except as it is recorded in the present.
146. lappuse - It is a place where inquiry is pushed forward, and discoveries verified and perfected, and rashness rendered innocuous, and error exposed, by the collision of mind with mind, and knowledge with knowledge.
194. lappuse - Department would be to: • Prevent terrorist attacks within the United States; • Reduce America's vulnerability to terrorism; and • Minimize the damage and recover from attacks that do occur.
vii. lappuse - ... account is finite. The reasons for this are of the same character as those which restrict the number of symbols. If we admitted an infinity of states of mind, some of them will be 'arbitrarily close' and will be confused. Again the restriction is not one which seriously affects computation, since the use of more complicated states of mind can be avoided by writing more symbols on the tape. Let us imagine the operations performed by the computer to be split up into 'simple operations' which are...
67. lappuse - Time-sharing methods were pioneered at the Massachusetts Institute of Technology and the University of California at Berkeley, under sponsorship of the Advanced Research Projects Agency of the US Department of Defense.
vii. lappuse - The behaviour of the computer at any moment is determined by the symbols which he is observing, and his " state of mind" at that moment. We may suppose that there is a bound B to the number of symbols or squares which the computer can observe at one moment. If he wishes to observe more, he must use successive observations.
viii. lappuse - We only have the information from the past, and we try to predict the next step, but in reality it depends upon the near future which we can't get at, or something like that. A very interesting question is the origin of the probabilities in quantum mechanics. Another way of putting things is this: We have an illusion that we can do any experiment that we want. We all, however, come from the same universe, have evolved with...
vii. lappuse - ... like a child's arithmetic book. In elementary arithmetic the two-dimensional character of the paper is sometimes used. But such a use is always avoidable, and I think that it will be agreed that the two-dimensional character of paper is no essential of computation. I assume then that the computation is carried out on onedimensional paper, ie, on a tape divided into squares.

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