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Displaying Results 1 - 8 of 8
• ### An international outlook for engineers

Publication Year: 1965
| PDF (102 KB)
• ### The rhometer: a continuous impurity monitor for liquid metal circuits

Publication Year: 1965, Page(s):331 - 343
| | PDF (1697 KB)

The rhometer uses the change in resistivity with impurity content of liquid metals, mainly sodium and sodium-potassium alloy, to measure the amount of impurities, such as oxide and hydride, etc., down to a few parts per million. It is a non-contactÂ¿ or electrodeless instrument, in that the liquid metal through a toroidal pipe which forms one turn of a 50-c/s transformer. The output from this tra... View full abstract»

• ### The determination of the parameters of a dynamic process

Publication Year: 1965, Page(s):345 - 361
Cited by:  Papers (3)
| | PDF (1740 KB)

The paper shows how the mathematical methods of steepest descent may be used to minimize certain functions of the satisfaction errorÂ¿ of a dynamic process.This minimization procedure forms the basis of certain automatic techniques for determining the coefficients or parameters of the process transfer function. The techniques, which are easily mechanized from normal analogue computer components, ... View full abstract»

• ### A specialization of the yanagisawa synthesis procedure to obtain RC active networks having optimum pole sensitivity

Publication Year: 1965, Page(s):362 - 368
| | PDF (551 KB)

A brief outline is given of the synthesis procedure due to Yanagisawa for obtaining a required voltage transfer function with an RC active network. The sensitivity of the networks to error in the negative impedance converter conversion factor is discussed in terms of the pole sensitivity of the network function. The realization of networks having the optimum sensitivity is considered. For the netw... View full abstract»

• ### A technique for the transmission of digital information over short distances using infra-red radiation

Publication Year: 1965, Page(s):369 - 373
| | PDF (1203 KB)

The paper describes a means of transmitting digital information over limited distances, using a gallium arsenide diode as an infra-red source. At the transmitter parallel binary characters are converted to serial form, and used to pulse-modulate the diode. Different widths of pulses represent logical one, and logical zero. Mirrors are employed to confine the energy into a nearly parallel beam, for... View full abstract»

• ### Tolerances in automatic landing: an analysis of the effect of equipment tolerances, changes in aircraft configuration and variations in wind conditions

Publication Year: 1965, Page(s):378 - 385
| | PDF (963 KB)

To ensure that production systems will perform an automatic landing with consistent accuracy, it is necessary to analyse the variations that may be expected in the landing performance. The system discussed is the B.L.E.U. single channel automatic landing system which utilizes ground-based radio aids to provide aircraft position information to the autopilot. The critical landing parameters are disc... View full abstract»

• ### Discussion on "Tolerances in automatic landing: an analysis of the effect of equipment tolerances, changes in aircraft configuration and variations in wind conditions"

Publication Year: 1965, Page(s):385 - 386
| PDF (233 KB)
• ### A Constant Impedance Voltage-controlled Phase-shift Network

Publication Year: 1965, Page(s):387 - 392
| | PDF (477 KB)

A voltage-controlled phase-shift network is presented in which a continuous change in phase of up to 60 deg per section may be obtained at constant impedance in the h.f. and v.h.f. range. Theoretical and experimental results are compared for two typical circuits, operating at 1 Mc/s and 80 Mc/s, which have an insertion loss of less than 1 dB, and a bandwidth of about 10%. View full abstract»