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 This page may be out of date.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 an X-ray of the breast that is used to screen for breast cancer. Mammograms can find tumors that are too small for you or your doctor to feel. There are several types of mammograms. Standard mammogram, which puts images of the breast on film.