Seismic inversion is a method that extracts acoustic impedance data from the seismic traces. Source wavelets are band-limited, and thus seismic traces do not contain low and high frequency information. Therefore, there is a serious problem when the deterministic seismic inversion is applied to real data and the result of deterministic inversion is smooth. Low frequency component is obtained fro...

Let’s define the vertical impedance of an 8-mm gap chamber due to geometric variation as one unit of impedance with the symbol zu. Since the resistive wall impedance of an 8mm gap chamber is 0.3 zu [2], the total impedance of an 8-mm gap chamber is 1.3 zu. The geometric impedance of a 5-mm gap chamber is 3.09 zu, which we obtained using the known scaling in Eq. (1) derived in [1]. Including 1.2...

A new method of wirelessly transducing electrochemical impedance without integrated circuits or discrete electrical components was developed and characterized. The resonant frequency and impedance magnitude at resonance of a planar inductive coil is affected by the load on a secondary coil terminating in sensing electrodes exposed to solution (reflected impedance), allowing the transduction of ...

Transverse coherent single bunch motions are studied theoretically and experimentally for the ESRF machine. Starting from the mode-merging instability observed at low chromaticities, the head-tail mode frequencies and current thresholds are measured systematically in the vertical plane as functions of chromaticity, beam current, RF voltage and optics. Measurement of damping and growth rates of ...

purpose: to evaluate the effect of vertical prism induced stress on binocular visual evoked potentials. methods: using checkerboard stimulus patterns in two spatial frequencies (sfs) of 0.48 cpd as a low sf and 2.18 cpd as a moderate sf reversing with temporal frequency of 4 hz, the effect of increasing visual stress using vertical prisms of 0, 1, 2 and 3 prism diopters on binocular visual evok...

This note describes the design, fabrication, and testing of a novel microelectromechanical systems Coulter counter. The Coulter counter will be used to detect and monitor impedance changes of cells as a function of time in response to different experimental extracellular environments. The device consists of SU-8 (negative photoresist) microchannels, vertical electroplated electrodes, polydimeth...

Measurements of the coherent tune shifts with intensity and of head-tail growth rates have been performed with single proton bunches in the SPS, at 26 GeV. From these measurements, the real and imaginary part of the transverse impedance can be estimated. Together with earlier and future measurements, this will be used to experimentally document and follow up the effect of the impedance improvem...