Accession Number : ADA322818

Title :   Timeliness and Predictability in Real-Time Database Systems.

Descriptive Note : Final rept. 1 Nov 95-31 Dec 96,

Corporate Author : VIRGINIA UNIV CHARLOTTESVILLE SCHOOL OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s) : Son, Sang H.

PDF Url : ADA322818

Report Date : FEB 1997

Pagination or Media Count : 82

Abstract : The confluence of computers, communications, and databases is quickly creating a globally distributed database where many applications require real time access to both temporally accurate and multimedia data. This is particularly true in military and intelligence applications, but these required features are needed in many commercial applications as well. Major applications are military command and control, avionics and weapon systems (e.g., missile guidance system), and monitoring and decision support systems. Those applications have at their core requirements for managing and analyzing massive amounts of data residing in many data repositories. Much of this data has timing attributes such as a particular satellite image being valid for no more than 5 minutes. Audio, video and images are key types of data which provide increased value to applications, but also increased challenges. Driving such systems are significant real time requirements for managing thousands of objects and tracking them by using a global, intelligent, and responsive multimedia database system. They have the following characteristics: (1) transactions with timing constraints; (2) data with temporal properties; (3) distributed multimedia data; and, (4) mixture of sensitive and unclassified data.

Descriptors :   *DATA BASES, *REAL TIME, *TIMELINESS, *RELIABILITY(ELECTRONICS), AVIONICS, GUIDED MISSILES, REQUIREMENTS, INTELLIGENCE, COMMERCE, DISTRIBUTED DATA PROCESSING, COMPUTER COMMUNICATIONS, PREDICTIONS, WEAPON SYSTEMS, COMPUTERS, TRACKING, ACCURACY, IMAGES, COMMAND AND CONTROL SYSTEMS, ARTIFICIAL SATELLITES, MILITARY APPLICATIONS, ACCESS TIME, MEDIA, GUIDANCE, STORAGE, DECISION SUPPORT SYSTEMS, CONFLUENCE.

Subject Categories : Electrical and Electronic Equipment
      Computer Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE