Heartbeat (2PM song)

"Heartbeat" is a song by K-pop band 2PM. It was released on November 10, 2009, as the lead single for The First Album 01:59PM. The song peaked at No. 1 on the Gaon Chart.

Promotion

Six teaser videos, each featuring one of the band members, were released in the weeks leading up to the album's release on YouTube. The videos started with various close-up shots of the band members hooked up to medical equipment and speaking. The videos then pan to a heartbeat monitor, play a short clip of the song, and displays the text "What is your Heartbeating for?" Taecyeon's video mentioned the inclusion of seven members in the band, although the seventh member (Jaebeom) exited the group before release of "Heartbeat."

Release and chart performance

The song peaked at #1 on the Gaon Chart.

Music video

The song's music video was released on November 11, 2009, the day after the song's release. It features dark, moody visuals. The color palette is mostly blacks, greys, and whites. It is the band's first music video to exclude Jaebeom, who left the band a few months before the video's release.

Heartbeat (computing)

In computer science, a heartbeat is a periodic signal generated by hardware or software to indicate normal operation or to synchronize other parts of a system. Usually a heartbeat is sent between machines at a regular interval on the order of seconds. If a heartbeat isn't received for a time—usually a few heartbeat intervals—the machine that should have sent the heartbeat is assumed to have failed.

Heartbeat protocol

A heartbeat protocol is generally used to negotiate and monitor the availability of a resource, such as a floating IP address. Typically when a heartbeat starts on a machine, it will perform an election process with other machines on the heartbeat network to determine which machine, if any, owns the resource. On heartbeat networks of more than two machines, it is important to take into account partitioning, where two halves of the network could be functioning but not able to communicate with each other. In a situation such as this, it is important that the resource is only owned by one machine, not one machine in each partition.

Ono (surname)

Ono (小野) and Ōno (大野) is a Japanese surname. Ono means "small field" and Ōno means "large field". Both are used as Japanese surnames. The following people were born in Japan, unless otherwise noted:

Wahoo

Wahoo (Acanthocybium solandri) is a scombrid fish found worldwide in tropical and subtropical seas. It is best known to sports fishermen, as its speed and high-quality flesh make it a prize game fish. In Hawaii, the wahoo is known as ono. Many Hispanic areas of the Caribbean and Central America refer to this fish as peto.

The flesh of the wahoo is white to grey, delicate to dense, and highly regarded by many gourmets. The taste is similar to mackerel, though arguably less pronounced. This has created some demand for the wahoo as a premium-priced commercial food fish. In many areas of its range, such as Hawaii, Bermuda and many parts of the Caribbean, local demand for wahoo is met by artisanal commercial fishermen, who take them primarily by trolling, as well as by recreational sports fishermen who sell their catch.

Description

Its body is elongated and covered with small, scarcely visible scales; the back is an iridescent blue, while the sides are silvery, with a pattern of irregular vertical blue bars and have razor sharp teeth. These colors fade rapidly at death. The mouth is large, and both the upper and lower jaws have a somewhat sharper appearance than those of king or Spanish mackerel.

Ono (P2P)

The Ono project is a software service that allows Peer-to-peer file sharing (P2P) clients to efficiently identify nearby peers. Using local peers takes pressure off international and other long distance transfers, and is said to simultaneously increase file download speeds.

This is a research project of Fabián E. Bustamante's AquaLab group at Northwestern University.

Ono claims to be able to increase download rates by between 31% and 207% on average, depending on whether the client is on an overloaded network or one with large available bandwidth. It is most visible as a plugin for the Azureus BitTorrent client - it is also available as an open tracker, and the Aqualab research group has recently published code to make Ono services easy to incorporate into other applications.

A more recent evaluation (one that used a single client connected to only one ISP located in the United States) has shown that Ono's benefits in practice are far short of the claims made in the original paper. In particular, when downloading real BitTorrent swarms while measuring the end-to-end benefits of using Ono, performance is unchanged, and interdomain traffic is reduced by less than 1%. While interesting, it is difficult to draw conclusions on the behavior of an Ono and similar software for large-scale distributed systems using the perspective of a single vantage point. The Ono authors have an interesting discussion on the pitfalls of testbed evaluations of Internet systems in the ACM SIGCOMM CCR of April 2010.