Hydra

Hydra may refer to:

Astronomy

Brands and company names

People

Places

Popular culture

Comics and animation

Hydra (Within Temptation album)

Hydra is the sixth studio album by Dutch symphonic metal band Within Temptation. It was released on January 31, 2014 in Europe and on February 4, 2014 in North America. The album contains guest appearances by singer Howard Jones (ex-Killswitch Engage), rapper Xzibit, metal vocalist Tarja Turunen (ex-Nightwish) and alternative rock singer Dave Pirner (Soul Asylum). The first single, "Paradise (What About Us?)", was released on September 27, 2013, and featured Turunen as guest vocalist. The second single, "Dangerous", was released on December 20, in which Jones provided the male vocals.

This is the first album by Within Temptation to be recorded with three guitarists, with Stefan Helleblad making his Within Temptation studio debut on Hydra since his addition to the band shortly after the release of The Unforgiving in 2011. Hydra is also the first Within Temptation album to feature Robert Westerholt's growling techniques since the band's debut album, Enter.

Background and composition

Lernaean Hydra

The Lernaean Hydra or Hydra of Lerna (Greek: Λερναῖα Ὕδρα, Lernaîa Hýdra), more often known simply as the Hydra, was a serpentine water monster in Greek and Roman mythology. Its lair was the lake of Lerna in the Argolid, which was also the site of the myth of the Danaids. Lerna was reputed to be an entrance to the Underworld and archaeology has established it as a sacred site older than Mycenaean Argos. In the canonical Hydra myth, the monster is killed by Heracles, using sword and fire, as the second of his Twelve Labors.

According to Hesiod, the Hydra was the offspring of Typhon and Echidna. It possessed many heads, the exact number of which varies according to the source. Later versions of the Hydra story add a regeneration feature to the monster: for every head chopped off, the Hydra would regrow one or multiple heads.

The Hydra had poisonous breath and blood so virulent that even its scent was deadly.

Development of the myth

The oldest extant Hydra narrative appears in Hesiod's Theogony, while the oldest images of the monster are found on a pair of bronze fibulae dating to ca. 700 BCE. In both these sources, the main motifs of the Hydra myth are already present: a multi-headed serpent that is slain by Heracles and Iolaus. While the fibulae portray a six-headed Hydra, its number of heads was first fixed in writing by Alcaeus (ca. 600 BCE), who gave it nine heads. Simonides, writing a century later, increased the number to fifty, while Euripides, Virgil and others did not bother to give an exact figure. Heraclitus the paradoxographer rationalized the myth by suggesting that the Hydra would have been a single-headed snake accompanied by its offspring.

Pulse (app)

LinkedIn Pulse was an app for Android,iOS and HTML5 browsers, originally released in 2010. The app, in its original incarnation, was deprecated in 2015 and integrated into LinkedIn.

History

Pulse was originally released in May 2010 for the Apple iPad. The app was created by Ankit Gupta and Akshay Kothari (two Stanford University graduate students) as part of a course at the Institute of Design. The company they formed, Alphonso Labs, was one of the first to use Stanford's business incubator SSE Labs. Pulse received positive reviews for its easy to use interface.

On 8 June 2010, the app was temporarily removed from the App Store hours after it was mentioned by Apple co-founder Steve Jobs at WWDC 2010, because The New York Times complained to Apple about the app pulling content from their feed, even though that feed was in use by other apps in the App Store. The app was approved once again and restored to the App Store later the same day after removing the The New York Times feed.

Pulse (physics)

In physics, a pulse is a single disturbance that moves through a medium from one point to the next point.

Pulse Reflection

Consider a pulse moving through a medium - perhaps through a rope or a slinky. When the pulse reaches the end of that medium, what happens to it depends on whether the medium is fixed in space or free to move at its end. For example, if the pulse is moving through a rope and the end of the rope is held firmly by a person, then it is said that the pulse is approaching a fixed end. On the other hand, if the end of the rope is fixed to a stick such that it is free to move up or down along the stick when the pulse reaches its end, then it is said that the pulse is approaching a free end.

Free End

A pulse will reflect off a free end and return with the same direction of displacement that it had before reflection. That is, a pulse with an upward displacement will reflect off the end and return with an upward displacement.

This is illustrated by figures 1 and 2 that were obtained by the numerical integration of the wave equation.

Pulse (2001 film)

Pulse, known in Japan as Kairo (回路), is a 2001 Japanese horror film directed by Kiyoshi Kurosawa. The film is based on his novel of the same name. The film was screened in the Un Certain Regard section at the 2001 Cannes Film Festival. The movie was well-received critically and has a cult following. An American remake, also titled Pulse, debuted in 2006 and spawned two sequels.

Plot

The plot centers on ghosts invading the world of the living via the Internet. It features two parallel story lines.

First Story

The first story involves a young woman named Kudo Michi (Kumiko Aso) who works at a plant sales company. She has recently moved to the city and her main friends are her three colleagues, Sasano Junko, Toshio Yabe and Taguchi. At the start of the film, it appears Taguchi has been missing for some days working on a computer disk. Michi goes to visit his apartment and finds him distracted and aloof; in the middle of their conversation, he casually makes a noose, leaves and hangs himself. Michi and her colleagues inspect the computer disk he left behind and discover it contains an image of Taguchi staring at his own computer monitor, which is displaying an image of Taguchi staring at his computer monitor, creating an endless series of images. In the other monitor on his desk, Michi and her friends discover a ghostly face staring out into Taguchi's room.