Hypomagnesemia in a Tennis Player

In brief: The patient in this case report engaged in severe and prolonged exercise (six hours of tennis daily) and suffered bouts of postexercise carpopedal spasm. She was found to have Hypomagnesemia. After receiving magnesium supplements, her symptoms abated and serum magnesium normalized.

Optical biasing on quasi-interferometry with coded correlation filtering

A new method for optical biasing is developed to improve the performance of quasi-interferometry with coded correlation filtering. First, by defocusing a mask, a quadratic phase factor is added to the object under test; this yields background fringes. Second, a linear phase factor is introduced by off-axis shifting of masks. The formulas describing these two effects are derived for various possible configurations. The condition of invariance is discussed. Simplified systems are also studied to obtain continuous changing of sensitivity independent of quadratic phase biasing. Some experiments and applications are illustrated.

Quasi-interferometry with coded correlation filtering

A new kind of principle is proposed to measure distorted transparent objects and specular surfaces directly. The method is based on correlation filtering of the object under study with two coded masks in noncoherent Fourier transformation. The information about the phase gradient appears in the form of fringes. The systems are analyzed mathematically. The following properties are shown: The systems can perform in real time and with an extended white light illumination. The various information can be obtained by using different masks. The sensitivity is relatively low and can be altered, marked, continuously varied, and even graded into several sections of different values. Some experiments and possible applications are shown.

Post-surgical heart block. Report of a case with bilateral bundle-branch block and changing rhythms

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