Discusses Noetica, a tool that uses a semantic network for structuring knowledge about concepts and the relationships between them. It differs from typical information systems in that the knowledge it represents is abstract, highly connected, and includes metaknowledge. Class hierarchy, visualization, and query tools are also discussed.…

Explores the relationship between the determinants of computer user expectations and user satisfaction. Results indicate that users whose expectations are set by sources internal to the organization are significantly more satisfied with their information systems (IS), and highlights the need for IS staff to communicate realistic expectations to…

Investigates the performance of a character-based Chinese text retrieval scheme in which monogram keys and bigram keys are encoded into document signatures. Tests and verifies the theoretical predictions of the optimal weight assignments and the minimal false hit rate in experiments using a real Chinese corpus for disyllabic queries of different…

Ordered sets (OS) of documents are encountered more and more in information distribution systems, such as information retrieval systems. Classical similarity measures for ordinary sets of documents need to be extended to these ordered sets. This is done in this article using fuzzy set techniques. The practical usability of the OS-measures is…

Explores ways to apply query structuring in cross-language information retrieval. Tested were: English queries translated into Finnish using an electronic dictionary, and run in a Finnish newspaper databases; effects of compound-based structuring using a proximity operator for translation equivalents of query language compound components; and a…

Examines previous research on keyword-search techniques and evaluates a keyword classification scheme. Compiled a list of 1056 management information systems (MIS) keywords from 14,676 articles in 27 (MIS) journals and compared it to an existing list (Barki). Concludes that a comprehensive keyword-classification system is needed for enhanced MIS…

Proposes a new method of text classification using stochastic decision lists, ordered sequences of IF-THEN-ELSE rules. The method can be viewed as a rule-based method for text classification having advantages of readability and refinability of acquired knowledge. Advantages of rule-based methods over non-rule-based ones are empirically verified.…

This special issues comprises nine papers presenting a wide selection of approaches to handling subjectivity, vagueness, and imprecision in information retrieval (IR) and database management necessary for success in designing, developing and implementing effective tools for information access. (LRW)

Considers a general problem of combining the classifications or predictions of local information systems into a single system. Introduces a new approach for solving an aggregation problem where a decision maker needs to classify an observation based on group-membership predictions coming from multiple experts, and describes results from empirical…

Discusses improving the quality of satisfaction of information needs through the use of information retrieval systems. The characteristics of information need are investigated; a new instrument in information retrieval systems is proposed which takes into account different components of information need; and future research is suggested.…

Describes an exploration system for large image databases. The system, which consists of three stages, allows user to interpret and annotate an image in the context in which that image appears, dramatically reducing the time taken to annotate a large collection of images. Includes 25 figures and two tables. (AEF)

Discusses database interfaces and explains that collaboration is an important aspect of searching online information retrieval systems that requires explicit computerized support. Collaboration in physical and in digital libraries is discussed and an example of a system that supports collaboration between browsers, ARIADNE, is described. (105…

Explores context in information seeking as equivalent to the situation in which a process is immersed. Discusses contingency approaches that detail active ingredients of the situation that have specific, predictable effects. Examines major frameworks for meaning systems. Discusses how a deeper appreciation of context can enhance understanding of…

Describes the architecture of an anthropocentric Biomedical Information Management System prototype that is based on a network of computational components, or agents, that expert biomedical users can define, use, and refine to serve their own communication and documentation habits and needs. The innovation of the proposal, the Participatory Design…

Using statistical stereotypes may be a means of improving the effectiveness of information-filtering systems that are based on user profiles. Highlights include information and expert systems that use stereotypes, assigning users to stereotypes, integrating stereotypes into a model for information filtering, and future research. (Author/LRW)