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The properties of thermionic emission from a cathode coated with barium oxide are studied. The cathode is indirectly heated and its temperature is measured by a thermocouple. It is found that the emitted electrons have a Maxwellian distribution corresponding closely to the temperature of the...
The analysis previously made for the current distribution along a symmetrical center‐driven antenna of non‐vanishing radius, and radiation field thereof, is extended to include long wire center‐driven antennas. The results of this investigation are then applied to obtain an approximate...
This paper describes a method for determining Fourier series coefficients from area measureurements on photographs of the function to be analyzed with the graph sheet formed into a series of semi‐cyclinders.
The principles of a short wave dosimetry method, based upon measuring of the electric field strength distribution, are explained. The applicability of this method for measurements outside and inside of the body to be treated is discussed. Measurements in some typical field arrangements are...
THE following technical applications are dealt with in this chapter: (1) belt drives, (2) clutches, (3) brakes, (4) vibration dampers, such as the Lanchester damper, (5) self‐excited vibrations, such as shaft whipping and sound production in a violin, and (6) grinding and crushing. In most...
A HOME office for the American Institute of Physics, as well as a national headquarters for its member societies and for the physicists of America is no longer a dream but a definite accomplished fact. At a fraction of its former value, the Institute has obtained a building eminently suited to...
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