In this work, microwave frequency measurement (MFM) is reviewed since the early stages using fully analog implementations, including its evolution to analog/digital implementations with high resolutions up 1 MHz. The review includes digital and photonics techniques, a discussion on achieved devices overall field of measuring identifying unknown signals. Several planar such as interferometers, f...

This paper celebrates the progress in optical frequency standards and measurement, won by the 40 years of dedicated work of world-wide teams working in frequency standards and frequency measurement. Amazingly, after this time interval, the field is now simply exploding with new measurements and major advances of convenience and precision, with the best fractional frequency stability and potenti...

conclusions compared to supine position, semi-fowler’s position is more effective in relieving chemotherapy-induced nausea and vomiting. results the severity, duration, and frequency of nausea and the severity and frequency of vomiting episodes in the control group differed significantly across the nine measurement time-points (p < 0.001). in the experimental group, the severity (p = 0.254) and...