This Article 
   
 Share 
   
 Bibliographic References 
   
 Add to: 
 
Digg
Furl
Spurl
Blink
Simpy
Google
Del.icio.us
Y!MyWeb
 
 Search 
   
A Tree Storage Scheme for Magnetic Bubble Memories
October 1980 (vol. 29 no. 10)
pp. 864-874
K.M. Chung, Wang Laboratories, Inc.
In this paper, we study the problem of maintaining a file in magnetic bubble memories. A memory structure with a special loop ordering scheme is proposed, in which records are stored in a balanced tree form. Algorithms for searching, insertion, and deletion are proposed. They have the property that, after each operation, the file is restored to a balanced tree form. The searching operation takes time log22 n/(2 log2 log2 n) + O(log2 n) where n is the number of records in the file, while insertion and deletion take additional log2 n + O(1) time each. This scheme, however, requires that each switch be individually settable. In the latter part of the paper, the memory is slightly modified, and a new loop ordering scheme proposed. With only two control operations, we show that searching, insertion, and deletion of records in the tree can still be done although the tree can no longer be kept in balanced form. If the tree is balanced, then searching, insertion, and deletion take only 5/2 log2 (n + 1) + O(1) time each.
Index Terms:
tree searching, Analysis of algorithms, deletion, insertion, magnetic bubble memories, searching
Citation:
K.M. Chung, F. Luccio, C.K. Wong, "A Tree Storage Scheme for Magnetic Bubble Memories," IEEE Transactions on Computers, vol. 29, no. 10, pp. 864-874, Oct. 1980, doi:10.1109/TC.1980.1675469
Usage of this product signifies your acceptance of the Terms of Use.