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NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGYNIST STANDARD REFERENCE DATA GROUPFREQUENTLY ASKED QUESTIONS
HOW
ARE YOUR DATA EVALUATED? 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.
HOW OFTEN ARE YOUR DATABASES UPDATED?
Our databases are typically updated every 1-2 years, after an extensive
data evaluation and SRD's quality database review.
HOW MANY NEW COMPOUNDS WERE
INCLUDED IN THE NEW UPDATE OF THE NIST/EPA/NIH MASS SPECTRAL LIBRARY?
There are now 147,198 fully-evaluated compounds with spectra
in the library. A total re-evaluation of the entire database has been
performed.
WHAT ARE YOUR PLANS FOR UPGRADING
TO NEW INFORMATION TECHNOLOGIES SUCH AS WINDOWS AND THE WEB? NIST
Standard Reference Databases are migrating to a Windows interface and
Standard Reference Data has released numerous databases on the Web, with
plans to do many more.
I WOULD LIKE TO INTEGRATE STANDARD
REFERENCE DATABASES INTO MY PRODUCTS. HOW DO I DO THAT? Many
of our data products include the source code in the package for easy inclusion
into internal programs. If our data products are included into commercial
packages for resale, distributor license agreements must be entered into.
Contact Standard Reference Data for details.
DO YOU GIVE SPECIAL CUSTOMER DISCOUNTS?
As a government agency, NIST Standard Reference Data is required to
treat all customers alike. There are multiple copy discounts available.
Contact Standard Reference Data.
IS SOURCE CODE INCLUDED IN THE REFPROP
DATABASE? Yes, the FORTRAN source code is included
for those who want to access the property routines from their own applications.
DOES NIST HAVE ANY DATABASES ON THE
PROPERTIES OF METALS? NIST has had two major
collaborative programs on metals data: The NIST-ASM International Alloy
Phase Diagram Program and the NIST-NACE Corrosion Data Program. Databases
and publications from these programs are available from our technical
society partners. Contact them at:
ASM International For mechanical and performance properties of iron and
steel, aluminum alloys and copper alloys, please contact:
ASM International Copper Development Association (CDA) Aluminum Association DOES NIST HAVE ANY DATABASES
ON POLYMERS? Several organizations
have published databases on commercial polymers and polymer-matrix composites.
These may be easily found by searching on the World Wide Web. In addition,
virtually every commercial polymer manufacturer maintains databases of
the properties of these products. Again, they can be found on the Web.
WHERE CAN I FIND STANDARD GUIDES
TO BUILDING MATERIALS DATABASES? ASTM (American Society for
Testing and Materials) has a Technical Committee - F49 on Computerization
of Materials and Chemical Property Databases. For further information,
contact Teresa Cendrowska, ASTM at (610)832-9718.
For more information please
contact:
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Create Date: 6/02
Last Update: Thursday, 06-Mar-03 15:40:45
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