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This thesis is a study on object-oriented knowledge representation. The study defines the main concepts of the object model. It also shows pragmatically the use of object-oriented methodology in the development of a concrete software system designed as the solution to a specific problem.The problem is to simulate the interaction between several animals and various other objects that exist in a room. The proposed solution is an artificial intelligence (Al) program designed according to the object-oriented model, which closely simulates objects in the problem domain. The AI program is conceived as an inference engine that maps together a given knowledge base with a database. The solution is based conceptually on the five major elements of the model, namely abstraction, encapsulation, modularity, hierarchy, and polymorphism.The study introduces a notation of class diagrams and frames to capture the essential characteristics of the system defined by analysis and design. The solution to the problem allows the application of any object-oriented programming language. Common Lisp Object System (CLOS) is the language used for the implementation of the software system included in the appendix. / Department of Computer Science

The main goal of this research is to develop an information base for learning and referencing graph theory, integrated with tools designed to create and manipulate graphs and to illustrate execution of graph algorithms and their applications. This research is dedicated to (1) helping those who wish to find the applications for graph theory but do not want to be experts, and (2) to empower experts in graph theory with more tools to progress further, through the use of a hypertext system.The development of this application is focused on using NoteCards, a hypertext system. It provides a variety of tools for collecting, representing, managing, interrelating, and communicating ideas. It provides the user with a network of electronicnotecards interconnected by typed links, which serves as a medium in which the user can represent a collection of related ideas. This facility is the basis for the development of a graph theory information base for GraphCards.The application can be classified into two major components:A graph theory information base which will cover most of the graph theory topics and graph algorithms.A graph theory experiment tool set with facilities like the Graph editor, Graph algorithm execution and animation, searching and annotating, testing and assessment of users, etc. / Department of Computer Science

Expert system techniques are now being incorporated successfully in commercial computer software packages. This thesis introduces the techniques of developing a rule-based expert system in a general-purpose programming language -- C. The topics of this thesis include significance of expert system shells and approaches used, structure of the knowledge base, loading of the knowledge base, manipulation of the probabilities of rule attributes, and implementation of the inference engine. The inference engine uses the information that users supply to find an object that matches. Today C language is one of the most popular programming languages in use and C compilers consistently produce extremely fast and efficient executable programs. Thisthesisdemonstrates that C language is an appropriate computer language for a rule-based expert system. / Department of Computer Science

This thesis creates an small expert system that is based on Einstein's special relativity. The basic knowledge of special relativity and the bases for building an expert system are described. The concepts of special relativity are put into a knowledge base by changing the formulas into rules and facts. The Prolog language was used to develop the expert system. New information can be input that does not contradict the rules and facts already in the database. The system also uses computer graphics to demonstrate the physical concepts of relativity. By using this expert system, one can teach the basic knowledge of special relativity and solve some problems related to frames of reference moving with high speed. / Department of Computer Science

Thesis (Ph. D.)--University of Hawaii at Manoa, 1995. / Includes bibliographical references (leaves 376-389). / Microfiche. / 2 v. (xix, 389 leaves, bound) ill. 29 cm