Juggling pattern revenge is usually considered the most involved and difficult of the three. A windmill, or false shower, is a juggling pattern which resembles the shower. It is often considered a prerequisite or preparation for Mills Mess, or the other way around. One hand throws outside (or reverse cascade) and the other throws underarm, so that the outside hand catches while crossed over the underarm hand. Siteswap: 3. Siteswap may also be extended to pass juggling. Simultaneous juggling: "<xxx|yyy>" notation means one juggler does 'xxx' while another does 'yyy'. 'p' is used to represent a passing throw. For example the Four-count,
Constant k filter that. The design techniques used by Campbell have largely been superseded. However, the ladder topology used by Campbell with the constant k is still in use today with implementations of modern filter designs such as the Tchebyscheff filter. Campbell gave constant k designs for low-pass, high-pass and band-pass filters. Band-stop and multiple band filters are also possible. Some of the impedance terms and section terms used in this article are pictured in the diagram below. Image theory defines quantities in terms of an infinite cascade of two-port sections, and in the case of the filters being discussed, an infinite ladder