Dog crossbreed major registry as purebred breeds. However, as of 2006, the portmanteau words cockapoo and Labradoodle are found in some dictionaries. Fanciful label names such as these are often found in for-sale ads, or on the websites that allow sellers to make up their own names for litters of crossbred puppies. The terms are only loosely descriptive and are seldom consistent. Among the trendier crossbreed dog are Labradoodles and Cockapoos, which each have their own fancier associations and affinity groups. Poodle and pug crossbreeds are also popular. In 2012, a new designer cross emerged called the Pomsky, which is a cross
Low frequency can be received up to from the transmitting antenna. Low frequency waves can also occasionally travel long distances by reflecting from the ionosphere (the actual mechanism is one of refraction), although this method, called "skywave" or "skip" propagation, is not as common as at higher frequencies. Reflection occurs at the ionospheric E layer or F layers. Skywave signals can be detected at distances exceeding from the transmitting antenna. In Europe and Japan, many low-cost consumer devices have since the late 1980s contained radio clocks with an LF receiver for these signals. Since these frequencies propagate by ground wave only, the