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Public Relations |
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Often public relations are described as the effort to influence the public or relevant parts of it by representing self-interests to reach certain goals. This view of PR is most commonly found, when acting within the economic sphere. On the other hand organizations like the  PRSA (Public Relations Society of America) as well as several PR theorists and practitioners see themselves as social engineers, responsible for societal harmony. "Public relations help our complex, pluralistic society to reach decisions and function more effectively by contributing to mutual understanding among institutions. It serves to bring public and public policies into harmony...", the PRSA announced in one of their official statements on public relations.
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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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