Reports a survey conducted by the Bibliographical Center for Research to determine the extent of variations for entering local data on the part of BCR OCLC libraries. The results are presented along with a discussion of alternative practices and their impact on the processing of OCLC tapes. References are included. (Author/RAA)

Explores the new storage technology of optical data disks and introduces a data structure, the inverted signature tree, for storing data on optical data disks for efficient text searching. The inverted signature tree approach is compared to the use of text signatures and the B+ tree. (22 references) (Author/CLB)

Investigates applicability of inverted file processing in magnetic bubble memories by presenting four magnetic bubble memory models as storage mediums: one based on a major-minor loop configuration; one utilizing a decoder design on a magnetic bubble memory chip; and two based on different structural configurations of the first two. (MBR)

The Inverted File Information Retrieval System (INFIRS), is a document search system which offers a comprehensive range of search facilities. It has been developed at the United Kingdom Chemical Information Service (UKCIS) as a general purpose retrieval tool, suitable for handling a wide variety of data-bases (both free-text and controlled…

Privacy is defined and its various social implications discussed in the first part of this paper. The effect of a National Data Center (NDC) and computerized dossiers about people and their past is also considered. It is determined that a computerized information system would present at least four distinct problems to individual identity or…

Twenty-nine steps necessary for data file preparation for secondary analysis are discussed. Data base characteristics and planned use vary the complexity of the preparation. Required techniques (file verification, sample verification, file merger, data aggregation, file modification, and variable controls) and seven associated pitfalls are defined…

A poorly designed data processing system in a school district testing office may cause a delay in the creation of test results, produce inaccurate results, or utilize more resources than are necessary. Therefore, the authors present a model of a data processing system as a basis for comparing systems in terms of the basic functions they must…

This paper describes a locally-developed multi-purpose system that stores data about any number of special collections within the libraries and prints that data in a number of formats on demand or as scheduled reports. The system operates on an IBM 360/67 dual processer with data entry via a teleprocessing system. The key to the file is the call…

Analyzes computer terminal memory performance in terms of overflow probability and average queueing delay, and presents new method to derive a closed expression for data arrivals with Erlangly distributed interarrival times and an approach to derive steady state probability expressions of the terminal memory content process. Twenty references are…

Response time in large, inverted file document retrieval systems is determined by time required to access files of document identifiers on disk and process a Boolean search request. A specialized computer system has been devised that can perform a complicated sample search involving 70 terms and over 60,000 document references 12 to 60 times…

This report delineates the theory and terminology of data compression. It surveys four data compression methods--null suppression, pattern substitution, statistical encoding, and telemetry compression--and relates them to a standard statistical coding problem, i.e., the noiseless coding problem. The well defined solution to that problem can serve…

The report specifies the design of the data entry system for the Sample Data System subsystems (SDS-1 and SDS-2) providing connectability to meet previously specified purposes and functions of the Management Information System for Occupational Education (MISOE). General assumptions for specifying the SDS data entry system are stated including the…

This report discusses the development and characteristics of the Prospective Student Inquiry Data File and Information System, which is used by the California State University at Chico (CSUC) as part of an effort to increase its student applicant population. Following a brief review of organizational background information, the report is divided…

The report describes an experimental study involving an on-line placement system in Boulder, Colorado which permitted applicants to request information from a terminal on any job stored in the computer. Data were collected on applicants referred by the Employment Service: whether or not hired, reason for not being hired if not hired, applicant…

The purpose of the research described in the report is twofold. First, it is to analyze the relative benefits and costs of on-line computerized placement systems. The techniques developed for such an analysis which might be useful in evaluating other manpower programs are presented. Second, it is to provide a prototype model which shows how…