Results 251 to 260 of about 6,466,499 (300)

Survey of electric discharge CO2 lasers

9th Aerospace Sciences Meeting, 1971
Based on research performed with sealed-off discharge tubes and with slow flowing gas lasers, most researchers believed, up until several years ago, that an upper limit of approximately 100 watts per meter of discharge length was obtainable from CO2 lasers. In 1967, a power output of 800 watts in a 30 cm long CO2: N2:He discharge was obtained at United
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Investigating the cause of excessive seepage in a dam foundation using seismic and electrical surveys—a case study of Asa Dam, West Africa

Bulletin of Engineering Geology and the Environment, 2021
W. Raji, K. O. Aluko
semanticscholar   +1 more source

The frequency-domain airborne electromagnetic method with a grounded electrical source

Geophysics, 2019
For surveys in areas with difficult access, ground-based electromagnetic (EM) systems are difficult to operate, time-consuming, and expensive, whereas airborne EM (AEM) systems are unsafe and uneconomic for small survey areas.
Jun Lin, L. Kang, Changsheng Liu, T. Ren, Haigen Zhou, Yao Yao, Shengbao Yu, Tengyang Liu, Peng Liu, Ming Zhang   +9 more
semanticscholar   +1 more source

Survey of Electrical Installations

2004
This course covers the requirements of the initial, annual, intermediate and periodical surveys, as specified in SOLAS. It does not cover preliminary design or plan approvals, nor does it cover the survey or inspection of chemical tankers, Gas carriers, special purpose ships or mobile offshore units.
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The Electrical Survey-when Is It Impractical?

CORROSION 1976, 1976
The electrical survey has been an invaluable tool in the field practice of corrosion control on pipelines. Its practicality for detecting the more aggressive corrosion areas has been well established. However, electrical surveys do have limitations.
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Survey of Electrical Installations

This course aims to meet the mandatory standards of competence in conducting surveys of electrical installations, particularly in verifying compliance with IMO conventions related to ship safety. Tailored to the trainees’ needs and experience levels, the course is a key resource to aid trainees in mastering essential survey ...
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Electricity in mines: a short survey

Journal of the Institution of Electrical Engineers, 1926
The paper provides a general review of the present position of electricity in mines, with particular reference to coal mines. Dealing with the safety aspect, it is claimed that the special requirements of colliery work have been amply met by manufacturers of electrical apparatus.
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Time-lapse electrical surveys to locate infiltration zones in weathered hard rock tropical areas

, 2017
M. Wubda, M. Descloîtres, N. Yalo, O. Ribolzi, J. Vouillamoz, M. Boukari, B. Hector, L. Séguis   +7 more
semanticscholar   +1 more source

Guidelines For Electrical Distribution Surveys

SPIE Proceedings, 1988
At the last Thermosense conference, many individuals expressed concern regarding the issue of performance guidelines. This became the focus of last year's Facilities and Utilities Subcommittee. Information was requested from those in attendance at that meeting who expressed a desire in developing guidelines for electrical distribution surveys.
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Surveying electrical installations in buildings

Structural Survey, 1985
Any electrical installation which is designed correctly, installed to a good standard of workmanship and maintained regularly should give many years of trouble‐free service. This paper assumes that the first requirement has been met and sets out the inspection and test procedures which are considered necessary to ensure that the two latter requirements
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