Since 1965 DSIS (Defense Scientific Information Service) has reproduced copies of microfiche documents received from outside sources for its customers. In 1970, in accordance with long-range plans to use microfiche as the back-up to an automated information retrieval system as a quick and inexpensive way of supplying reports identified by a…

False drops occur in a system of random superimposed coding for edge-notched, punched, and feature cards. Formulae for the false dropping fraction are derived, and figures and tables are given for the calculated values in the most popular scheme. (Author/LS)

Indexing and abstracting can be thought of as a way of modeling an actual document or textual item. Both are miniature versions of the actual thing. Normally, the indexing model is used to locate desired information, while the abstracting model is used as a screening medium to help the searcher decide which of the apparently correct actual items…

The research has contributed toward establishing a discipline of information science since it shows that fundamental principles dealing with communication exist and can be applied to pracitcal problems. Several courses and Ph.D. dissertations grew out of the research. (Author)

Response time of on-line document retrieval systems is analyzed. Linear and inverted file organizations are considered and their response times are evaluated. (Author)

Information mapping is a method of organizing categories of information and of displaying them for both learning and reference purposes. The method may be applied to the production of self-instructional books or to the organization of data bases for computer-aided instruction and reference. The report is itself written in modified information map…

A manual describing the RIC computer search program for retrieval of information from ERIC, CIJE, and other collections is presented. It is pointed out that two versions of this program have been developed. The first is for an IBM 360/370 computer. This version has been operational on a production basis for nearly a year. Four installations of…

A model of a generalized information storage and retrieval system is proposed. The model consists of six subsystems (or blocks): logical processor, selector, descriptor, file, locator, document file, and analysis block. These subsystems function in a partial environment defined by the user and data blocks. Proceeding from a verbal description, a…

Two systems, WLN and Ringcode, for retrieving structural information were analyzed qualitatively and evaluated for a series of chemical compounds. The studies ranged from specific to generic questions and also involved retrieval by fragments. Neither system was completely satisfactory for all types of searches. (6 references) (Author)

The paper describes TSAR, a current awareness or SDI system which has been developed for processing MARC records in general, but is particularly concerned with the INSPEC service. Some statistics on the frequency of occurrence of words and comments on data compression conclude the paper. (7 references) (Author/SJ)

Proposes a microprocessor-based architecture that makes large use of parallelism both in processing and in retrieval operations. The proposed system consists of three functional blocks: the query processor, simple query executers, and the answer composer. Twenty-one references are listed. (FM)

The purpose of this study was to explore cost-effectiveness factors that affect the choice among alternative systems. A cost-effectiveness model that may be used to evaluate potential systems was derived and a statement of the general magnitude of costs that the American Psychological Association (APA) can expect in implementing and operating…

The general scope of SPIRAL is storage of free-flowing text information into a machine-readable library and recall of any portions of this stored information that are relevant to an inquiry. The major objectives in the design of the system were (1) to make it easy to use by persons unfamiliar with computer systems; and (2) to make it efficient, in…

The paper reports on a series of programs that have been developed at the Moore School to process data-bases, consisting of textual items, and to index and arrange the data items in accordance with an automatically generated classification system. The programs produce the directories and the rearranged data-base on microfilm, where it may be…

WISE-ONE, an information retrieval system, was designed to facilitate searches of the documents cataloged by the ERIC centers and distributed as ERIC RESUMAST master files. WISE-ONE is written to search for documents cataloged under any of the three indices (descriptors, identifiers, and author name), called search keys, and will yield the ERIC…