Reports experiments with a term weighting model incorporating relevance information in which it is assumed that index terms are distributed dependently. It is argued that, if high recall searches are required, relevance feedback based on the modified dependence model may be superior to the Boolean search. (Author/VT)

A STUDY WAS MADE OF THE FEDERAL AVIATION INFORMATION RETRIEVAL SYSTEM (FAIRS), WHICH SERVES DIVERSE INFORMATION NEEDS OF THE AGENCY'S TECHNICAL AND ADMINISTRATIVE PERSONNEL. FAIRS WAS DEVELOPED TO OPERATIONAL CAPACITY BY (1) ASSIGNING DESCRIPTORS AND IDENTIFIERS TO REPORTS TO PREPARE THEM FOR SUBSEQUENT RETRIEVAL, (2) EXPANDING, DEVELOPING, AND…

THE PURPOSE OF THIS PAPER IS TO DEVELOP AN INSTRUCTIONAL AND SYSTEMATIC APPROACH TO THE DESIGN AND IMPLEMENTATION OF A MANAGEMENT INFORMATION SYSTEM. GOALS, OBJECTIVES, STRUCTURE, AND RESPONSIBILITIES FORM THE FRAMEWORK OF A MANAGEMENT INFORMATION SYSTEM. THE TASK OF A MANAGEMENT INFORMATION SYSTEM IS TO PROCESS RAW DATA IN SUCH A WAY AS TO…

The report describes a large-scale computerized system for Selective Dissemination of Information (SDI) developed over the past five years at the U.S. Army Electronics Command to serve its technical personnel. The system, which uses as its document base the current accessions of the Defense Documentation Center, was developed in three phases: (1)…

As the fourteenth report in a series describing research in automatic information storage and retrieval, this document covers work carried out on the SMART project for approximately one year (summer 1967 to summer 1968). The document is divided into four main parts: (1) SMART systems design, (2) analysis and search experiments, (3) user feedback…