Substituting EMC emission measurement by field and cable scan method using measured transfer function

Sound velocity measurement using transfer function method

Abstract The transfer function of a piezoelectric transducer, buffer rod and sample assembly is used to measure the sound velocity of solid materials. From the recorded transfer function, pulse echo patterns at frequencies of the passband of the input signal are reproduced after convoluting with monochromatic RF input signals. The time delay is obtained by performing pulse echo overlap and phas...

Calculation of the field-emission current from a surface using the Bardeen transfer Hamiltonian method

We have developed a method for calculating the field-emission current from a clean or adsorbate-covered metal surface using the transfer Hamiltonian method of Bardeen. The present formalism can be incorporated in accurate atomistic electronic structure methods, and so is capable of addressing system specific band structure effects, adsorbate-induced resonances, and is amenable to accurate treat...

effect of percutaneous nephrolithotomy on renal function measured by tc-99m- dimercapto-succinic acid renal scan

Postblink changes in the ocular modulation transfer function measured by a double-pass method.

PURPOSE To examine the temporal changes in the modulation transfer function (MTF) of the eye after a blink. METHODS The distance MTF of a 5-mm pupil was derived from double-pass retinal images in 20 healthy young subjects at various intervals after a blink (1 second up to 15 seconds). Such measurements include the effects of wavefront aberration, scattered light, and errors in focus and are t...

Modulation Transfer Function Measurement Using Three- and Four-bar Targets.

Modulation-transfer-function (MTF) measurement often involves the use of three- and four-bar resolution targets. In the conversion of three- and four-bar image data to MTF, biased results can occur when we use series-expansion techniques appropriate for square-wave targets of infinite extent. For systems where the image data are digitally recorded, a convenient and accurate conversion of bar-ta...