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Major U.S. Think Tanks: RAND Corporation |
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In 1948 RAND was created at the urging of its original sponsor, the Air Force. After World War II, RAND focused especially on research in national security. Today RAND operates on a broad front, making its research available to public policy makers at all levels, private sector leaders in many industries, and the public at large. RANDs research and analysis aims to: provide practical guidance by making policy choices clear and by addressing barriers to policy implementation; develop solutions to complex problems by bringing researchers in all relevant academic specialities; dissemination of research findings. RAND has more than 500 employees.
Official Organizational Status: Independent Institute
Political Orientation: U.S. Center-right
Scope/Research Areas: RAND specializes in: Foreign relations and diplomacy, security and defense, economic issues, regional studies, science sand technology, labor and human resource development, social issues, education and health and welfare.
Funding Sources: 1998 Budget: US$ 113.5 million. National, local and state government (83 %) and private donations (17 %).
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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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