Half-pipe

A half-pipe is a structure used in gravity extreme sports such as snowboarding, skateboarding, skiing, freestyle BMX, and skating.

The structure is wood, concrete, metal, earth, or snow. It resembles a cross section of a swimming pool, essentially two concave ramps (or quarter-pipes), topped by copings and decks, facing each other across a flat transition, also known as a tranny. Originally half-pipes were half sections of a large diameter pipe. Since the 1980s, half-pipes contain an extended flat bottom between the quarter-pipes; the original style half-pipes are no longer built. Flat ground provides time to regain balance after landing and more time to prepare for the next trick.

Half-pipe applications include leisure recreation, skills development, competitive training, amateur and professional competition, demonstrations, and as an adjunct to other types of skills training. A skilled athlete can perform in a half-pipe for an extended period of time by pumping to attain extreme speeds with relatively little effort. Large (high amplitude) half-pipes make possible many of the aerial tricks in BMX, skating and skateboarding.

Half Pipe (roller coaster)

Half Pipe is a steel launched shuttle roller coaster located at both Elitch Gardens in Denver, Colorado and at Särkänniemi in Tampere, Finland. The structure is 100 feet in height and consists of 230 feet of track. The ride is currently one of two rides of its type offered in the United States (the other being Avatar Airbender at Nickelodeon Universe in Mall of America).

Riders are placed in one of two cars on the train which is made to resemble a giant skateboard. Each car is a free-spinning circle that holds eight people. The track is essentially a giant, upright U and trains are loaded at the bottom of the U. LIM engines accelerate the train up both sides of the track. A typical ride consists of approximately five to six cycles of the train traveling through the U.

There is another Half Pipe, identical to the others, on top of the Don Quijote store in Roppongi, Tokyo. The coaster was completed in December 2005, but it never opened, and remains standing but not operating.

Pipe

Pipe may refer to:

Music

Anonymous pipe

In computer science, an anonymous pipe is a simplex FIFO communication channel that may be used for one-way interprocess communication (IPC). An implementation is often integrated into the operating system's file IO subsystem. Typically a parent program opens anonymous pipes, and creates a new process that inherits the other ends of the pipes, or creates several new processes and arranges them in a pipeline.

Full-duplex (two-way) communication normally requires two anonymous pipes.

Pipelines are supported in most popular operating systems, from Unix and DOS onwards, and are created using the "|" character.

Unix

Pipelines are an important part of many traditional Unix applications and support for them is well integrated into most Unix-like operating systems. Pipes are created using the pipe system call, which creates a new pipe and returns a pair of file descriptors referring to the read and write ends of the pipe. Many traditional Unix programs are designed as filters to work with pipes.

Smoking pipe

A smoking pipe is a device made to allow the user to inhale or taste smoke or vapor derived from the burning or vaporization of some substance. The most common form of these is the tobacco pipe, which is designed for use with tobacco, although the device itself may be used with many other substances. The pipes are manufactured with a variety of materials, the most common (as the popularity of its use): Briar, Heather, corn, meerschaum, clay, cherry, glass, porcelain, ebonite, acrylic and other more unusual materials. Other kinds of smoking pipes include: