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Sodium-layer laser guide stars
The requirements and design of a laser system to generate a sodium- layer beacon is presented. Early results of photometry and wavefront sensing are given.
Date:
August 3, 1993
Creator:
Friedman, H. W.
System:
The UNT Digital Library
A lower bound for routing on a completely connected optical communication parallel computer
The task of routing a 2-relation on an n-processor completely connected optical communication parallel computer (OCPC) is considered. A lower bound is presented that applies to any randomized distributed algorithm for this task: specifically, it is shown that the expected number of steps required to route a 2-relation is {Omega}({radical} log log n) in the worst case. For comparison, the best upper bound known is O(log log n).
Date:
August 3, 1993
Creator:
Goldberg, L. A.; Jerrum, M. & MacKenzie, P. D.
System:
The UNT Digital Library