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Introduction: The Substitution of Human Faculties with Technology: Early Tools |
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The development of modern technologies, led by men's curiosity and inquiring mind as well as the desire to facilitate work processes has a long and complex history.
Already in prehistoric times tools made of stone were developed to expand men's physical power. In the following millenniums simple mechanical devices and machines such as the wheel, the lever and the pulley were invented. The next step was the development of powered machines. For example, windmills, waterwheels and simple steam-driven devices.
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Expert system
Expert systems are advanced computer programs that mimic the knowledge and reasoning capabilities of an expert in a particular discipline. Their creators strive to clone the expertise of one or several human specialists to develop a tool that can be used by the layman to solve difficult or ambiguous problems. Expert systems differ from conventional computer programs as they combine facts with rules that state relations between the facts to achieve a crude form of reasoning analogous to  artificial intelligence. The three main elements of expert systems are: (1) an interface which allows interaction between the system and the user, (2) a database (also called the knowledge base) which consists of axioms and rules, and (3) the inference engine, a computer program that executes the inference-making process. The disadvantage of rule-based expert systems is that they cannot handle unanticipated events, as every condition that may be encountered must be described by a rule. They also remain limited to narrow problem domains such as troubleshooting malfunctioning equipment or medical image interpretation, but still have the advantage of being much lower in costs compared with paying an expert or a team of specialists.
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