ceramic webbook
evaluated data

Evaluated Data SelectionsHow are data evaluated?
NIST High-Temperature Superconducting Materials Database
Details? See About WebHTS.

NIST Structural Ceramics Database
Details? See About WebSCD.

NIST Property Data Summaries for Advanced Materials
Details? See About WebPDS.
Scientific and technical data may be examined from three viewpoints: how well is the data generation described, how do the data follow the known physical laws, and how do the data compare to other measurements or calculations of the same phenomena. The description of data generation is crucial. The identification and control of all relevant independent variables must be addressed and demonstrated. For mature areas such as thermodynamics and atomic physics, many measurement techniques are well characterized. In these cases, the adherence to physical laws and intercomparisons predominate. For areas in which behavior is not well understood, such as corrosion, data from different experiments are not usually comparable. Consequently, documentation of control of the experimental condition is most important.

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Date created: 08 February 2001
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