Scientific results are communicated visually in the literature through diagrams, visualizations, and photographs. In this thesis, we developed a figure processing pipeline to classify more than 8 million figures from PubMed Central into different figure types and study the resulting patterns of visual information as they relate to scholarly…

This two-part article combines a comprehensive account of a probabilistic model of retrieval with new systematic experiments on TREC (Text Retrieval Conferences) Program material. Part 1 covers the foundations and the model development for document collection and relevance data, along with the test apparatus. Data and results tables for both parts…

Introduces the multicharacter trie as an index structure that can improve the time needed for retrieving full-text materials stored on CD-ROMs. The advantages of this structure compared to other structures are described, and experimental results comparing it to the widely used B+ tree and other structures used for full-text retrieval are…

Examines some questions arising in connection with the application and usefulness of Bradford's Law, which describes the dispersion of articles on a particular subject among journal titles. (Author)

This preliminary study of the region and its population, which was conducted in order to determine the best methods for the distribution of information, is based largely on 1971 census data and will require review and further analysis when the 1976 census data are available. A brief description of the region and the characteristics of the local…

Findings of this study indicate that the degree of adequacy varies and identify three major needs: (1) prescriptive measures to ensure adequate subject analysis; (2) new subject heads to provide greater topic and race specificity; and (3) more research as the basis for improvement of present practices or the design of a new system. (Author/MBR)

Reports the findings of a study which examined the question of submitting error reports to OCLC for the purpose of database quality control, and describes ENHANCE, a program that would provide online error correction capability for member libraries. Eight references are cited. (FM)

Discussion of retrieval overlap and relevant overlap focuses on an analysis of data from an earlier study on overlap among document representations. This new analysis investigated the odds that an item was judged relevant when it was retrieved by two search fields as opposed to being retrieved by only one field. (Contains 17 references.) (LRW)

How Tennessee County Extension personnel spent their time in Fiscal Year 1970 and 1971 and how they planned their time in Fiscal Year 1971 are discussed in this master's thesis. Information on planned and expended time was retrieved through TEMIS (Tennessee Extension Management Information System). Wide variations were found to exist between time…

Describes compression methods for components of full-text systems such as text databases on CD-ROM. Topics discussed include storage media; structures for full-text retrieval, including indexes, inverted files, and bitmaps; compression tools; memory requirements during retrieval; and ranking and information retrieval. (Contains 53 references.)…

Discussion of the use of computer-based information retrieval systems in schools focuses on three paper and pencil experiments conducted in the United Kingdom that were designed to investigate how 9- to 11-year-olds organized and retrieved information from four organizational structures: lists, hierarchies, networks, and tables. (18 references)…

Describes an interface mechanism called "complex view support" to be used with a relational database system (RDBS) in supporting increasingly complex distributed environments in automated library systems. The interface system refers queries to multidimensional tables as well as to flat tables on RDBS and is shown to efficiently support…

Presents the results of a comparative evaluation of four CD-ROM retrieval software packages using the Revised Richards-Brown CD-ROM Software Evaluation Model. CD Answer, SPIRS, KAware2, and ROMware are evaluated, and results indicate that SPIRS and CD Answer are the favored packages. (LRW)

The Midwest Regional MEDLARS Center in Ann Arbor, Michigan which was established in April 1966 and terminated in April 1972 is described. The Center implemented MEDLARS Demand Search service in December 1967. During its years of operation, the Michigan MEDLARS Center formulated and released 4,823 Demand Searches. The searches originated from: the…