Discusses search requests in information retrieval systems and describes the development of an algorithm for the automatic construction of query formulations in Boolean form. Topics discussed include user needs, information retrieval languages, online systems, design requirements for the algorithm, and algorithmic functioning in information…

Discussion of the problem of control in documentary information retrieval (IR) systems focuses on feedback mechanisms. Information needs are discussed, particularly the Problem Oriented Information Need (POIN); the structure of an adaptive IR system is described; and the design of algorithms for automated IR systems is explained. (33 references)…

Discusses the design of multiversion information retrieval systems and provides a theoretical justification for the necessity of creating such systems to perform an optimal search for the user's information needs. Topics discussed include comparing query formulations; feedback algorithms; an experiment with a test collection; and the mechanism of…

Describes an approach to the design and implementation of an information retrieval system capable of providing an optimal search for each individual user based on the properties of information need. An algorithm is proposed for organizing optimal search in the systems realizing SDI (selective dissemination of information). (Author/LRW)