Crankshaft

A crankshaft—related to crank—is a mechanical part able to perform a conversion between reciprocating motion and rotational motion. In a reciprocating engine, it translates reciprocating motion of the piston into rotational motion; whereas in a reciprocating compressor, it converts the rotational motion into reciprocating motion. In order to do the conversion between two motions, the crankshaft has "crank throws" or "crankpins", additional bearing surfaces whose axis is offset from that of the crank, to which the "big ends" of the connecting rods from each cylinder attach.

It is typically connected to a flywheel to reduce the pulsation characteristic of the four-stroke cycle, and sometimes a torsional or vibrational damper at the opposite end, to reduce the torsional vibrations often caused along the length of the crankshaft by the cylinders farthest from the output end acting on the torsional elasticity of the metal.

History

Roman Empire

A Roman iron crank of yet unknown purpose dating to the 2nd century AD was excavated in Augusta Raurica, Switzerland. The 82.5 cm long piece has fitted to one end a 15 cm long bronze handle, the other handle being lost.

Flying

Flying may refer to:

Publications

Films and television

Music

Albums

Songs

Flying (Cast song)

"Flying" is the fifth single by the Liverpool britpop band Cast, fronted by ex La's bassist John Power.

Formats and track listings

Personnel

Chart performance

References

Flying (Beatles instrumental)

"Flying" is an instrumental by the Beatles which first appeared on the 1967 Magical Mystery Tour release (two EP discs in the United Kingdom, an LP in the United States). It is one of the very few songs written by all four of the Beatles: John Lennon, Paul McCartney, George Harrison, and Ringo Starr.

Origins

The first instrumental written by the Beatles since "12-Bar Original" in 1965, this was the first song to be credited as being written by all four members of the band with the writing credits of "Harrison/Lennon–McCartney/Starkey". It was recorded on 8 September 1967 with mellotron, guitar, bass, maracas, drums, and tape loops overdubs on 28 September.

"Flying" was originally titled "Aerial Tour Instrumental", The end of the recording originally included a fast-paced traditional New Orleans jazz-influenced coda, but this was removed and replaced with an ending featuring tape loops created by John Lennon and Ringo Starr during the 28 September session. The loops initially made the song last 9 minutes 38 seconds, but the track was cut down to only 2 minutes 17 seconds. Part of the loops were used alongside an element of the ending jazz sequence to make "The Bus", an incidental piece used at various points, for the TV movie.

Tor (anonymity network)

Tor is free software for enabling anonymous communication. The name is an acronym derived from the original software project name The Onion Router, however the correct spelling is "Tor", capitalizing only the first letter. Tor directs Internet traffic through a free, worldwide, volunteer network consisting of more than seven thousand relays to conceal a user's location and usage from anyone conducting network surveillance or traffic analysis. Using Tor makes it more difficult for Internet activity to be traced back to the user: this includes "visits to Web sites, online posts, instant messages, and other communication forms". Tor's use is intended to protect the personal privacy of users, as well as their freedom and ability to conduct confidential communication by keeping their Internet activities from being monitored.

Onion routing is implemented by encryption in the application layer of a communication protocol stack, nested like the layers of an onion. Tor encrypts the data, including the destination IP address, multiple times and sends it through a virtual circuit comprising successive, randomly selected Tor relays. Each relay decrypts a layer of encryption to reveal only the next relay in the circuit in order to pass the remaining encrypted data on to it. The final relay decrypts the innermost layer of encryption and sends the original data to its destination without revealing, or even knowing, the source IP address. Because the routing of the communication is partly concealed at every hop in the Tor circuit, this method eliminates any single point at which the communicating peers can be determined through network surveillance that relies upon knowing its source and destination.

Arm (disambiguation)

An arm is an upper limb of the body.

Arm or ARM may also refer to:

Geography

Science and medicine

Technology

Computing

ARM (novella)

ARM is a science fiction novella by American author Larry Niven. Set in the Known Space cycle, it is the third of five Gil Hamilton detective stories.

Hamilton is called to the scene of a murder. The victim is Dr. Raymond Sinclair, a brilliant scientist who has invented a mysterious device that creates a bubble of accelerated time. The murder scene is a locked apartment at the top of a high-rise, where the prime suspect is a beautiful young woman whom Gil refuses to believe is the killer.

One of the themes running throughout the story, and in fact a vital element in the solution of the mystery, is the loss of an arm. Gil himself lost an arm and had a new one grafted on, using parts from an organ bank which is supplied by the bodies of criminals and "corpsicles", people who underwent cryogenic suspension. At the scene of the crime, a beautiful young woman is discovered unconscious in an "autodoc" (a device for fixing minor injuries or preserving life until help arrives) recovering from the loss of one of her arms. Another character in the story also lost an arm previously, but regards grafts as immoral and wears an advanced prosthetic arm instead. The "accelerated time bubble" has the effect of amputating the arm of anyone who reaches into it, since the arm's metabolism speeds up to the point where the rest of the body cannot supply it with blood.