TL;DR: A number of key-to-address transformations are surveyed with particular emphasis given to distribution-dependent hashing methods, and the notion of an order-preserving transformation is introduced.
Abstract: A number of key-to-address transformations are surveyed with particular emphasis given to distribution-dependent hashing methods. The open addressing, separate chaining, coalesced chaining, and rehashing collision resolution techniques are discussed. A comparison of the different key-to-address transformation techniques is presented. The application of these techniques is considered and the notion of an order-preserving transformation is introduced.
TL;DR: Results supported the hypothesis that subjects taught using backward chaining required less time to learn the task than those taught using forward chaining.
Abstract: This study arose from a need to determine which of two techniques was the most efficient means for assisting the mentally retarded to achieve optimum independence in functional living skills. Twenty-four educable mentally retarded adults were assigned to two groups and instructed in a sequenced motor assembly task. One group was taught using a forward chaining method and the other, a backward chaining method. Subjects were measured for learning time and retention performance. Results supported the hypothesis that subjects taught using backward chaining required less time to learn the task than those taught using forward chaining. There was no significant difference in retention between the two groups.
TL;DR: In this article, the authors propose to simplify the storage addressing of the state information word as well as the chaining of the control word for the input/output control unit of a data processor.
Abstract: PURPOSE:To increase the efficiency for the input/output device of a data processor by simplifying the storage addressing of the state information word as well as the chaining of the control word for the input/output control unit.