Bureau of Standards' Analyzed Samples

A Report on the National Bureau of Standards pH Standards

In 1980, the research program in pH was re-established at the National Bureau of Standards (NBS). This report describes the state of this research, as well as the state of the NBS pH standards. The thermodynamic definition and the determination of pH are elaborated. The problems of liquid junction potentials encountered in the practical determination of pH are discussed. The goal of the researc...

of Research of the National Bureau of Standards Grid Plate Calibration at the National Bureau of Standards January - February 1988

National Bureau of Standards Gaithersburg, MD 20899 Grid plates are calibrated by a completely automated high precision measuring machine which uses a computer vision system to detect and locate the grid marks. The system routinely calibrates plates of up to 600x600 millimeters with accuracies of 0.5 micrometers. Descriptions of the system components, level of performance and tests of the absol...

Computer Development at the National Bureau of Standards

The first fully operational stored-program electronic computer in the United States was built at the National Bureau of Standards. The Standards Electronic Automatic Computer (SEAC) [1] (Fig. 1.) began useful computation in May 1950. The stored program was held in the machine’s internal memory where the machine itself could modify it for successive stages of a computation. This made a dramatic ...

NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY (NIST) (Formerly National Bureau of Standards)

Our objectives in the DARPA Spoken Language Program are: (1) to provide a central role in speech database design, development and distribution; and (2) to design, coordinate implementation of, and analyze results of performance tests. (3) Prepared the Prototype CD-ROM Version of the DARPA TIMIT Acoustic-Phonetic Speech Database. This CD-ROM contains the data for 420 talkers (4200 sentence utter...

[U. S. Department of Commerce, National Bureau of Standards. Bibliography of publications by the Dental Research Section of the National Bureau of Standards].