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I would like to comment on an article by Fabrizio Luccio 1 which discusses weighted increment linear search for scatter tables.
A proof method, subgoal induction, is presented as an alternative or supplement to the commonly used inductive assertion method. Its major virtue is that it can often be used to prove a loop's correctness directly from its input-output specification without the use of an invariant. The relation...
Two algorithms are presented for sorting n 2 elements on an n × n mesh-connected processor array that require O (n) routing and comparison steps. The best previous algoritmhm takes time O(n log n). The algorithms of this paper are shown to be optimal in time within small constant factors....
When data records are grouped into blocks in secondary storage, it is frequently necessary to estimate the number of blocks X D accessed for a given query. In a recent paper 1, Cardenas gave the expression X D = m (1 - (1 - 1/ m ) k ), (1) assuming that there are n records divided into m blocks...
In a recent paper, Shneiderman and Scheuermann 1 have defined an interesting operation, called uniform insertion , whereby a (linked) data structure G 2 can be embedded within another structure G 1 in such a way that each data node of G 1 serves as an entry node for G 2 . This communication...
This paper presents the results of a study testing the s-shaped budget curve of Nolan's stage model of computer development in an organization. Research on the data processing budgets of California counties fails to support the s-shaped curve or the use of budgets as a basis for a stage model....
A class of index structures for use in a virtual memory environment is described. Design alternatives within this class of index structures are analyzed. These alternatives include a choice of search strategy, whether or not pages in the index are stuctured, and whether or not keys are...
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