Electric measuring apparatus

ELECTRIC IMPEDANCE OF ASTERIAS EGGS Apparatus

Several years ago the absolute value of the al ternat ing current impedance of suspensions of Arbacia eggs was measured at frequencies from 1 to 15,000 kc. (Cole, 1928b). I t was concluded tha t the egg membrane capaci ty was not as near ly a static capaci ty as the capaci ty of the red blood cell membrane (Fricke, 1925 a, 1933), bu t was of the polarization impedance type, similar to tha t whi...

Modified Lsm for Calibration of Measuring Apparatus

Modified least squares method (LSM) is developed that take into account errors in input standard signals for calibration of measuring devices. Calibration of the differential pressure gage by the standard control-point setting mechanisms is demonstrated in the paper as an example. The accuracy of the coefficient estimates changes when the errors of the control-point setting mechanisms are taken...

Apparatus for measuring cell aggregation in vitro.

Ancilla-assisted calibration of a measuring apparatus.

A quantum measurement can be described by a set of matrices, one for each possible outcome, which represents the positive operator-valued measure (POVM) of the sensor. Efficient protocols of POVM extraction for arbitrary sensors are required. We present the first experimental POVM reconstruction that takes explicit advantage of a quantum resource, i.e., nonclassical correlations with an ancilla...

A New Apparatus for Measuring Surface Tension

Surface tension is probably one of the most difficult phenomena to measure. Although a great deal of ingenuity has been spent for almost a century in devising accurate techniques, the figures obtained deviate more from each other for the same substance, according to different authors, than any other constant characterizing the substance. I t is well ,known tha t the two classes of methods of me...