Analysis of the feedback system in a nonintrusive dynamic flowmeter for measuring Pogo oscillations

Equations were developed which describe the closed loop feedback system operation of a proposed ultrasonic, dynamic, nonintrusive flowmeter whose design is based on a constant phase, voltage controlled frequency feedback concept. These equations are based on linear feedback system theory. The time constant of a low pass filter is taken into account. The equations show that the larger the open loop gain, the smaller the error due to fluctuations in the speed of sound and the smaller the effective time constant

Calibration of a universal indicated turbulence system

Theoretical and experimental work on a Universal Indicated Turbulence Meter is described. A mathematical transfer function from turbulence input to output indication was developed. A random ergodic process and a Gaussian turbulence distribution were assumed. A calibration technique based on this transfer function was developed. The computer contains a variable gain amplifier to make the system output independent of average velocity. The range over which this independence holds was determined. An optimum dynamic response was obtained for the tubulation between the system pitot tube and pressure transducer by making dynamic response measurements for orifices of various lengths and diameters at the source end

Letter from Mrs. W. J. Chapin to Senator Langer Regarding US House Joint Resolution 33 and US Senate Joint Resolution 11, July 18, 1949

This letter dated July 18, 1949, from Mrs. W. J. Chapin of Hankinson, North Dakota to United States (US) Senator William Langer, explains that Mrs. Chapin has been asked by Reverend H. W. Case of the Fort Berthold Mission to write to Langer regarding US House of Representatives Joint Resolution 33 and US Senate Joint Resolution 11, hoping Langer will vote for them. Chapin explains she is president of the congregation\u27s Ladies Aid and that the members were asked by Case to to what they could to help support the mission at Elbowoods. See also: Letter from Senator Langer to Mrs. W. J. Chapin Regarding US House Joint Resolution 33 and US Senate Joint Resolution 11, August 8, 1949 Hearings before the Subcommittee on Indian Affairs of the Committee on Public Lands House of Representatives Eighty-First Congress First Session on H.J. Res. 33 Providing for the Ratification by Congress of the Contract to Purchase Indian Lands by the United States from the Three Affiliated Tribes of Fort Berthold, North Dakota An Act to Vest Title to Certain Lands of the Three Affiliated Tribes of the Fort Berthold Reservation, North Dakota, in the United States, and to Provide Compensation Thereforhttps://commons.und.edu/langer-papers/1948/thumbnail.jp

Dynamic-pressure measurements using an electronically scanned pressure module

Frequency response was measured for different lengths and diameters of tubing between a sinusoidal pressure source and a pressure sensing module from an electronically scanned pressure measuring system. Measurements were made for straight runs of both steel and vinyl tubing. For steel tubing, measured results are compared with results calculated by using equations developed by Tijdeman and Bergh. Measurements were also made with a bend in the vinyl tubing at the module. In addition, measurements were made with two coils placed in the tubing near the middle of the run

Postcard: W. E. Marcy\u27s Exhibit

This black and white photographic postcard features a variety of vegetables and grains affixed to a white board for display. A handwritten sign is at the top of the display. The display is propped up on two books that are placed on a chair. A wallpapered wall is in the back ground. There is handwriting on the back of the card.https://scholars.fhsu.edu/tj_postcards/1205/thumbnail.jp

The Pursuit of Happiness

A thesis submitted in partial fulfillment of the requirements for the degree of Master of Fine Arts at Virginia Commonwealth University

Aquatic Insects of Upper Three Runs Creek, Savannah River Plant, South Carolina. Part II: Diptera

As discussed in detail in Part I of this series (Morse et al. 1980), aquatic insects were collected biweekly from six locations on Upper Three Runs Creek, Savannah River Plant near Aiken, South Carolina, from September 1976 through August 1977, using light traps and semi-quantitative benthic sampling methods. See part I (Morse et al. 1980) for site and habitat descriptions and for a discussion of the methods used. In that publication, faunistic results were provided for all insect taxa except Diptera and relative abundance data for all but Diptera and non-dryopoid Coleoptera

Simulating the Performance of Large-Format Submillimetre Focal-Plane Arrays

A robust measurement of the clustering amplitude of the sub-mm population of starburst galaxies requires large-area surveys (>> 1 deg^2). The largest-format arrays subtend only 10 arcmin^2 on the sky and hence scan-mapping is a necessary observing mode. Providing realistic representations of the extragalactic sky and atmosphere, as the input to a detailed simulator of the telescope and instrument performance, allows important decisions to be made about the design of large-area fully-sampled surveys and observing strategies. In this paper we present preliminary simulations that include detector noise, time-constants and array geometry, telescope pointing errors, scan speeds and scanning angles, sky noise and sky rotation.Comment: 3 pages, 3 figures, Conference Contribution: 2K1BC Workshop "Experimental Cosmology at millimetre wavelengths", July 9-13 2001, Ital