NIST researchers receive DARPA award. (News Briefs).At a recent meeting of principal investigators Noun 1. principal investigator - the scientist in charge of an experiment or research project PI scientist - a person with advanced knowledge of one or more sciences in the DARPA DARPA: see Defense Advanced Research Projects Agency. (Defense Advanced Research Projects Agency) The name given to the U.S. Advanced Research Projects Agency during the 1980s. It was later renamed back to ARPA. Active Networks program, the program manager announced the selection of a research team from NIST (National Institute of Standards & Technology, Washington, DC, www.nist.gov) The standards-defining agency of the U.S. government, formerly the National Bureau of Standards. It is one of three agencies that fall under the Technology Administration (www.technology. to receive the 2001 "Bytes for the Buck" award, given annually. The NIST team focused on developing a standard means to specify processor demands for mobile computer programs, also known as mobile code. Well-accepted standards exist to express resource demands for memory (bytes) and bandwidth (bits per second), but no accepted standard exists to express CPU CPU in full central processing unit Principal component of a digital computer, composed of a control unit, an instruction-decoding unit, and an arithmetic-logic unit. demands. Success in this research would permit mobile code, arriving over a network, to declare CPU requirements in an accurate, quantitative form that can be understood on any computer platform. With such a specification, computers can better control CPU usage by mobile programs. For example, malicious or erroneous erroneous adj. 1) in error, wrong. 2) not according to established law, particularly in a legal decision or court ruling. mobile programs could be prevented from using excessive CPU time The amount of time it takes for the CPU to execute a set of instructions and generally excludes the waiting time for input and output. CPU time - processor time , while valid mobile programs can run safely to completion. During the 2-year project, the NIST team measured CPU usage in many mobile programs and virtual machines written for DARPA, and then developed and evaluated various models to describe CPU demands. While the results obtained show substantial improvements over various naive approaches currently used in the Active Networks program, more research remains before the project can achieve its original goal. Based on the promising results, DARPA funded an extension to the project. CONTACT: Kevin Mills, (301) 975-3618; kevin.mills@nist.gov. |
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