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7 results on '"Drummond, J.R."'

1. Design of a difference-frequency infrared laser spectrometer for absorption line-shape studies

Author

Wehr, R., Drummond, J.R., and May, A.D.

Subjects
Atmospheric gases -- Optical properties, Optical spectrometers -- Design and construction, Astronomy, Physics
Abstract

An infrared laser spectrometer based on difference-frequency generation in LiI[O.sub.3] is described. The spectrometer has a frequency uncertainty of less than 1 MHz and a signal-to-noise ratio between 3000:1 and 10,000:1. These properties allow the spectrometer to be used for studies of the non-Lorentzian and non-Voigt character of absorption line shapes in atmospheric trace gases. OCIS codes: 300.1030, 300.6190, 300.6320, 300.6340, 300.6360, 300.6390.

Published
2007

2. Spectroscopic technique for measuring the temperature and pressure cycle of a pressure modulator radiometer

Author

Berman, R., Duggan, P., Le Flohic, M.P., May, A.D., and Drummond, J.R.

Subjects
Radiometers -- Evaluation, Temperature measurements -- Methods, Pressure -- Measurement, Spectrum analysis -- Methods, Astronomy, Physics
Abstract

Precise spectral line measurements of carbon monoxide in an operating pressure modulator cell permit independent determinations of the instantaneous gas temperature and pressure.

Published
1993

3. Digital divider circuit for a laser-beam-pointing stabilization system

Author

Sinclair, P.M., Drummond, J.R., and May, A.D.

Subjects
Digital electronics -- Usage, Laser beams -- Research, Astronomy, Physics
Abstract

A digital divider circuit is used in a feedback circuit that is designed to stabilize laser-beam pointing. Key words: Digital divider, beam-pointing stability.

Published
1995

5. Fowler, Wirth see difficulties ahead; keynoter Reuss urges telcos to make capital recovery a priority

Author

Myers, Del and Drummond, J.R.

Subjects
Telephone, Business, Telecommunications industry, United States Independent Telephone Association
Abstract

Fowler assures crowd that deregulation will not proceed without consideration of impact on industry ... Wirth expresses concern for the transitional period ... Reuss sets telco priorities as recovery of capital investments, upgrading and maintenance of plants, competitive pricing, and fair competition with alternate distribution systems.

Published
1981

7. 'Show Me State' is affable host to 1st regional showcase of '82

Author

Drummond, J.R. and Myers, Del

Subjects
Telephone, Telecommunications equipment industry, Business, Telecommunications industry, United States Independent Telephone Association, United States Telecommunications Suppliers Association
Published
1982

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