Known for hot temperatures, Southern California and the rest of the Southwest United States are undergoing a cold snap that has set records in many areas throughout the region.
Periodogram is the spectrum of a set of time signal usually obtained by fast Fourier transform (FFT). It usually shows frequency as x-axis, and magnit... This page may be out of date.
A mammogram is a special X-ray examination of the breast made with specific X-ray equipment that can often find tumors too small to be felt. A mammogram is one of the best radiographic methods available today to detect breast cancer early.