A definitional approach to the construction of knowledge-based systems is presented. The notions of a knowledge base and the logical interface of a knowledge base are discussed.

Evaluation of knowledge acquisition (KA) technology is difficult because of the costs of using human expertise in experimental studies. An analysis of the types of errors a human expert makes in building a knowledge-based system (KBS) has been developed which suggests that a simulation of the key factors in building a KBS is possible. A demonstration KA simulation has been implemented for one K...

This article presents methods for modeling knowledge base and database for intelligent concurrent design, including mathematical formulation and system development. Four issues are addressed in this research: (1) modeling product life-cycle aspects using aspect primitives called features, (2) generating product life-cycle aspects using a knowledge-based system, (3) maintaining consistency of pr...

Our goal is to build knowledge acquisition tools that support users in modifying knowledge-based systems. These modi cations may require several individual changes to various components of the knowledge base, which need to be carefully coordinated to prevent users from leaving the knowledge-based system in an unusable state. This paper describes an approach to building knowledge acquisition too...

Personalized knowledge-based systems have not yet become widespread, despite their potential for valuable assistance in many daily tasks. This is due, in part, to the high cost of developing and maintaining customized knowledge bases. The construction of personal assistants as learning apprentices -interactive assistants that learn continually from their users -is one approach which could drama...

Many knowledge-based systems feature general machinery that operates on externally supplied information, These systems must solve the acquisition problem: how to represent the external knowledge, determine if it is adequate, and incorporate it into the knowledge base. As a mediator between users and interactive services, the Consul system must understand the intent and behavior of programs that...

the aim of this study was to determine the effect of a school- based educational program regarding hiv/aids and the knowledge held by the high school students. this quasi-experimental study was conducted with 230 high school students (grade 10-12 female, male). teaching aids used for this intervention was a combination of three methods including lectures, showing an educational movie and pamphl...

background: evidence-based medicine (ebm) is a current practice in medicine to produce clinical practice guidelines from well-designed, randomized, controlled trials. we studied knowledge, attitude, and practice of ebm of neurologists who participated in the iranian congress of neurology. methods: a self-administered anonymous questionnaire was distributed and filled by neurologists. results: a...

introduction: evidence based medicine (ebm) is current tool in medicine to produce clinical practice guidelines from well-designed, randomized, controlled trials.  we studied knowledge, attitude and practice of evidence based medicine (ebm) of neurologist participated in the iranian congress of neurology. methods: a self administered anonymous questionnaire had been distributed and filled by ne...