The All in the Family story makes one wonder how many other gems never had the chance to become classics. The good news, however, is that there are plenty of shows that have stood the test of time. With the help of Wikipedia, and a little math, I found a list of the 20 longest-running network TV shows.
Gaussian filters are used in image processing because they have a property that their support in the time domain, is equal to their support in the frequency domain. This comes about from the Gaussian being its own Fourier Transform.
Since surface water is subject to run-off and does not. undergo natural filtration, it must be filtered to remove particles and impurities. Filtration can be compared to a sieve or micro-strainer that traps suspended material between the. grains of filter media. However, since most suspended particles can easily pass through the. spaces between grains of the filter media, straining is the least important process in filtration. Filtration primarily depends on a combination of complex physical and chemical mechanisms, the most important being adsorption. Adsorption is the process of particles sticking onto the. surface of the individual filter grains or onto the previously deposited materials.