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Reddi, Arumalla V. – Information Processing and Management, 1984
Presents a system model for transmission of input data that is coming from terminals of users in a limited user resource-sharing environment. Performance of a mini/microcomputer receiving mixture of picture-phone terminal data is analyzed with constant service times, synchronous transmission, and single-server interruptions through first-order…
Descriptors: Computer Storage Devices, Display Systems, Information Networks, Information Storage

Bird, P. R. – Information Processing and Management, 1975
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)
Descriptors: Data Processing, Information Retrieval, Information Storage, Information Systems

Bratley, Paul; Choueka, Yaacov – Information Processing and Management, 1982
Presents uniform and efficient approach for processing all truncated query terms in information retrieval which requires one disk access to obtain from the permuted dictionary all strings represented by truncated term. The problem of the overhead storage required to implement the permuted dictionary is discussed. Fifteen references are provided.…
Descriptors: Algorithms, Information Retrieval, Information Storage, Information Systems

Harper, D. J.; And Others – Information Processing and Management, 1986
Discusses data model role in an office filing facility, office data model requirements, and various modelling paradigms for office data modelling. Data model application to a typical collection of office data is presented, filing and retrieval operations are illustrated, and proposed research into other office data modelling aspects is outlined.…
Descriptors: Databases, Design, Filing, Information Retrieval

Bernier, Charles L. – Information Processing and Management, 1978
Examines the selective dissemination of indexed surrogates to overcome two major causes of cultural lag: reading overload and lack of cogency of technical communication. An analysis of three models--reference-retrieval systems, question-answering systems, and surrogate-dissemination systems--explores reasons for lag in technique implementation.…
Descriptors: Abstracts, Culture Lag, Information Dissemination, Information Retrieval

Cooper, David; Lynch, Michael F. – Information Processing and Management, 1984
Suggests new method of external distribution called tree partitioning that involves use of binary tree to split incoming file into successively smaller partitions for internal sorting. Number of disc accesses during a tree-partitioning sort were calculated in simulation using files extracted from British National Bibliography catalog files. (19…
Descriptors: Classification, Comparative Analysis, Computer Software, Data Processing

Smeaton, A. F.; van Rijsbergen, C. J. – Information Processing and Management, 1986
Review of office filing facility filing and retrieval mechanisms for unstructured and mixed media information focuses on free text methods. Also discussed are the state of the art in handling voice and image data, problems with searching text surrogates to implement free text content retrieval, and work of Project Minstrel. (Author/MBR)
Descriptors: Artificial Intelligence, Data Processing, Databases, Filing

Rao, V. Venkata; Zunde, Pranas – Information Processing and Management, 1982
Brief discussion of state-of-the-art of modeling complex information systems distinguishes between macrolevel and microlevel modeling of such systems. Network layout and hierarchical system models, simulation, information acquisition and dissemination, databases and information storage, and operating systems are described and assessed. Thirty-four…
Descriptors: Databases, Information Dissemination, Information Needs, Information Networks

Hoey, P. O'N. – Information Processing and Management, 1982
The Ministry of Agriculture, Fisheries and Food conducted an operational evaluation of the software packages CAIRS and STATUS, which were used to build databases and databanks. Setting up the trial, types of data involved (chemical products used as pesticides), searching and presentation of data, and the final choice are covered. (EJS)
Descriptors: Comparative Analysis, Computer Programs, Databases, Foreign Countries

Restorick, F. Mark – Information Processing and Management, 1986
Examines novel computer filing systems which have particular application to office information storage and retrieval requirements. A variety of filing systems and their major characteristics are reviewed, ranging from network-based file servers to digital image storage and retrieval systems. Desirable characteristics of a modern electronic office…
Descriptors: Artificial Intelligence, Comparative Analysis, Database Management Systems, Databases

Koenig, Michael E. D. – Information Processing and Management, 1987
Presents a four-stage hypothesis of information systems development based on computational capability, storage capability, communications capability, and effective voice input. Moore's Law and Mooers' Law are explained, the interface between the system and the user is discussed, and projections for the future are suggested. (21 references)…
Descriptors: Computer Storage Devices, Futures (of Society), Information Processing, Information Science

Smith, F. J.; Devine, K. – Information Processing and Management, 1985
Zipfian laws for frequency distributions of word pairs and longer phrases are derived from text sample analysis. From crossing of Zipfian curves, it is deduced that number of multi-word phrases that occur frequently in text is surprisingly small, of same order of magnitude as number of individual word-types. (8 references) (EJS)
Descriptors: Algorithms, Graphs, Indexing, Information Retrieval

Morrissey, J. M.; And Others – Information Processing and Management, 1986
Proposes a "Model of Querying" for users of office filing facilities and discusses its motivation, aspects, attributes, and advantages. A review of current information systems and attempts to combine information retrieval, artificial intelligence, and database management techniques leads to conclusion that no resultant system is adequate…
Descriptors: Artificial Intelligence, Comparative Analysis, Database Management Systems, Databases