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California Polytechnic State University, San Luis Obispo

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Articles 7981 - 7989 of 7989

Full-Text Articles in Engineering

Laser Doppler Anemometry For Flow Measurement, William W. Durgin, Lawrence C. Neale Feb 1977

Laser Doppler Anemometry For Flow Measurement, William W. Durgin, Lawrence C. Neale

Office of the Provost Scholarship

Laser doppler anemometers are non-invasive, linear, and inherently precise. Calibration, in the usual sense, is not necessary; length and frequency measurements suffice to establish velocity at a spatial point. Measurements were made at points in the cross-sections of two square ducts containing water flow. The points were selected in conformance with a numerical integration scheme to be used for volumetric flow rate determination from the velocity measurements. The experiments were performed in a primary calibration facility at flows up to 1.25 m3/sec using ducts with sides 46 and 92 cm. The anemometer, operating in forward scatter differential mode …

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Air Pollution Control Training In Colleges And Universities: A Status Report For The United States And Canada, Harold M. Cota Oct 1976

Air Pollution Control Training In Colleges And Universities: A Status Report For The United States And Canada, Harold M. Cota

Civil and Environmental Engineering

The APCA Education and Training Committee surveyed air pollution training at colleges and universities in the United States and Canada in 1975. There were 197 full-time faculty teaching air pollution courses at 75 schools. Graduates from these programs are finding meaningful work in both the public and private sector. Financial support is briefly discussed.

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Wave Induced Pressures On Submerged Plates, William W. Durgin, Jong C. Shiau Feb 1975

Wave Induced Pressures On Submerged Plates, William W. Durgin, Jong C. Shiau

Office of the Provost Scholarship

The prediction of forces, or more precisely, the pressure distributions, experienced by submerged structures due to the passage of gravity waves has become important with the advent of large offshore structures. If the size of a structure is small compared to the wavelength then the forces can be evaluated by the assignment of suitable drag and inertia coefficients using an approach similar to that of Morison (6) in which case it is necessary to determine the coefficients experimentally for any given geometry (2). If the size of the structure is a significant fraction of the wavelength, the preceding method is …

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Problems Of Measurement In The Environmental Field, Harold M. Cota Jul 1973

Problems Of Measurement In The Environmental Field, Harold M. Cota

Civil and Environmental Engineering

No abstract provided.

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Air Pollution Control Training In Colleges And Universities In The United States, Harold M. Cota Sep 1971

Air Pollution Control Training In Colleges And Universities In The United States, Harold M. Cota

Civil and Environmental Engineering

A nationwide survey of air pollution control training efforts in the United States at colleges and universities was carried out for the S-ll Education and Training Committee, Air Pollution Control Association. Information from 91 schools having four year or graduate programs and five community colleges was received. Questions include type of course work, backgrounds of participating faculty and students, and eventual placement. At the present time about 70% of those in training are graduate students. It was found that most students taking initial employment in air pollution control activities had the M.S. degree. Recommendations for updating this information are made.

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On The Phenomenon Of Vortex Street Breakdown, William W. Durgin, Sture K.F. Karlsson Jan 1971

On The Phenomenon Of Vortex Street Breakdown, William W. Durgin, Sture K.F. Karlsson

Office of the Provost Scholarship

A von Kármán vortex street generated in the usual way was subjected to a deceleration, thereby changing the ratio of longitudinal to lateral spacing between the vortices. Distortion of the individual vortices followed which resulted in annihilation of concentrated vortex regions and creation of a stationary wake flow. This wake flow was itself dynamically unstable and developed into a new vortex street of a different frequency from the initial one. The breakdown of the initial vortex street is qualitatively explained by considering the convection of a concentrated vortex region due to the motion imposed by all the other vortices.

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Decomposition Of Diulte Hydrogen Peroxide In Alkaline Solutions, Harold M. Cota, T. Katan, M. Chin, F. J. Schoenweis Sep 1964

Decomposition Of Diulte Hydrogen Peroxide In Alkaline Solutions, Harold M. Cota, T. Katan, M. Chin, F. J. Schoenweis

Civil and Environmental Engineering

No abstract provided.

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Worldwide Training In Air Pollution Control, Harold M. Cota Jul 1964

Worldwide Training In Air Pollution Control, Harold M. Cota

Civil and Environmental Engineering

A survey of academic training in air pollution control was recently conducted for the APCA Education Council. Questionnaires were sent to faculty at over 200 universities in the United States and 150 universities around the world. This paper lists the schools which completed the questionnaire and includes the number of both undergraduate and graduate courses available, the academic department, and the range of research projects presently underway. The findings indicate that air pollution is a subject being taught worldwide. Most schools predict that their current level of instruction will not change in the next five years. Additions and corrections are …

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Design Parameters For Fuel Batteries Operating In A Zero G Field, A. P. Hardt, Harold M. Cota, J. L. Fick, T. Katan Nov 1963

Design Parameters For Fuel Batteries Operating In A Zero G Field, A. P. Hardt, Harold M. Cota, J. L. Fick, T. Katan

Civil and Environmental Engineering

Some design parameters of a hydrazine-oxygen fuel battery operating in a zero G field are described in a digital computer programming treatment. The power balance for a battery employing a gas-producing electrode and an electrolyte pump is treated; optimum power densities and flow rates are established.

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