This paper attempts to analyze the problem of congestion, using a mathematical model shown to be of value in other similar applications. Three criteria of congestion are considered, and it is found that the conclusion one can draw is sensitive to which of these criteria is paramount. (8 references) (Author/NH)

To study the format, content, and rationale of public catalogs used at the University of California at Los Angeles (UCLA) libraries, a questionnaire was sent to each of the campus libraries. The data collected included information on: 1) number of volumes in the library's collection; 2) number of drawers in its catalog; 3) physical arrangement of…

Describes a transaction log analysis of the New York Public Library research libraries' OPAC (online public access catalog). Much of the remote searching occurred when the libraries were closed and was more evenly distributed than internal searching, demonstrating that remote searching could expand access and reduce peak system loads. (Contains…

The "see" and "see also" references in a library's catalog are supposed to provide the cross-references necessary to guide the user to the appropriate subject heading. However, libraries have difficulty maintaining the current, accurate subject authority files needed to facilitate this. A review of the literature in this…

The Colorado Digitization Project (CDP) commissioned the Library Research Service (LRS) of the Colorado State Library and the University of Denver Library and Information Science Program to evaluate user perceptions of the relative merits of the catalog (or database) and the exhibit approaches to providing access to digital information, especially…

Describes methods used at the University of Akron (Ohio) library to increase the usage of government publications, including cataloging that appears in the online catalog, integrating them into bibliographic instruction, listing in pathfinders, and presenting workshops. Examples are appended. (LRW)

Discussion of online public access catalogs focuses on a study that evaluated 3 different systems in Great Britain. Comparative evaluations were made using structured exercises to determine searching techniques and transaction logs to investigate user behavior. Comments on future research are also given. (12 references) (LRW)

Uses continuous-time stochastic models, mainly based on semi-Markov chains, to derive user state transition patterns, both in rates and in probabilities, in a Web-based information system. Describes search sessions from transaction logs of the University of California's MELVYL library catalog system and discusses sequential dependency. (Author/LRW)

Describes a study conducted to investigate patron use of the online catalog at New York's Nassau Community College. Provides findings related to the number and types of patrons using information terminals, time required for searches, preferred methods for learning to use the terminal, and the most common searches. (MAB)

Describes a study that compared figures derived from a questionnaire-based, book availability survey and from computer records of the use of the library's catalog. Although differences emerged, it was concluded that the computer monitoring technique could act as a surrogate for availability surveys. (AEF)

Discusses library use studies that examined library catalog search failures and demonstrates types of online catalog access that can reduce the failures caused by card catalog flaws or by user search errors by half. The use of single keyword, implied Boolean, or derived truncated key retrieval is suggested. (14 references) (LRW)

This study developed an analytical approach to detecting groups with homogenous usage patterns in a Web-based information system. Principal component analysis was used for data reduction, cluster analysis for categorizing usage into groups. The methodology was demonstrated and tested using two independent samples of user sessions from the…

Researchers studying subject searching distributed an online questionnaire to users who access the University of California's online public access catalog, MELVYL, from public access terminals in the libraries of the University of California at Santa Cruz. This article discusses the results of transaction log analysis, comparison of in-library and…

Discussion of information filters focuses on the results of the first phase of a user study of a filter and describes the background, experience, and computer usage habits of the subjects before they began using the filter. Topics include e-mail; listservs; and information searching tools, including library online public access catalogs.…

Discussion of user persistence in displaying postings from an online catalog focuses on a study at the University of Illinois at Chicago that compared results of an earlier study of user persistence with a recent study of users and their online catalog, LUIS. Results of questionnaires and transaction log analysis are reported. (LRW)