Energy (signal processing)

In signal processing, the energy of a continuous-time signal x(t) is defined as

the energy of a discrete-time signal x(t) is defined as

Relationship to energy in physics

Energy in this context is not, strictly speaking, the same as the conventional notion of energy in physics and the other sciences. The two concepts are, however, closely related, and it is possible to convert from one to the other:

For example, if x(t) represents the potential (in volts) of an electrical signal propagating across a transmission line, then Z would represent the characteristic impedance (in ohms) of the transmission line. The units of measure for the signal energy would appear as volt²·seconds, which is not dimensionally correct for energy in the sense of the physical sciences. After dividing by Z, however, the dimensions of E would become volt²·seconds per ohm, which is equivalent to joules, the SI unit for energy as defined in the physical sciences.

Spectral energy density

Seven Year Itch (Collective Soul album)

On September 18, 2001, Collective Soul released their greatest hits compilation Seven Year Itch: Greatest Hits, 1994-2001 (stylized as 7even Year Itch). The compilation includes songs recorded from 1994 to 2001 and included two new tracks; "Next Homecoming" and "Energy". Seven Year Itch received decent reviews and was relatively successful It sold 225,000 copies in the first year after its release and reached number fifty on the Billboard 200; in Canada, it reached number nine on its albums chart and went platinum. All the songs in Seven Year Itch had charted in the US on the Billboard Hot 100, Mainstream Rock Tracks, or the Modern Rock Tracks chart, except for "Energy", which debuted in this compilation.

The compilation has sold over 500,000 copies. It saw a resurgence in sales after Collective Soul began putting out albums on their own independent label, El Music Group, beginning in 2004.

Seven Year Itch was the last album Collective Soul released through Atlantic Records and their last album to feature guitarist Ross Childress, who had been with the band since its 1993/1994 debut.

Energy (Drake song)

"Energy" is the second single by Canadian rapper Drake from his fourth commercial release If You're Reading This It's Too Late.

Composition

"Energy" contains samples from Eazy-Duz-It performed by Eazy-E and Ridin Spiners performed by Three 6 Mafia. Energy was produced by Boi-1da and OB O'Brien. According to WhoSampled the song samples the score of an episode of The O.C..

Critical reception

"Energy" received acclaim from music critics with many calling it the best song of the album. Ryan Dombal of Pitchfork gave the song a positive review and named it "Best New Track", stating "The song isn't aimed to any rappers or pop stars, not Kendrick Lamar, Big Sean or Tyga, but the song lines are dangerous."

Music video

Release

The video of "Energy" was released on Apple Music and users with iTunes and registered Apple Music account can watch this video.

Synopsis

Apple Inc.

Coordinates: 37°19′55″N 122°01′52″W / 37.33182°N 122.03118°W / 37.33182; -122.03118

Apple Inc. is an American multinational technology company headquartered in Cupertino, California, that designs, develops, and sells consumer electronics, computer software, and online services. Its hardware products include the iPhone smartphone, the iPad tablet computer, the Mac personal computer, the iPod portable media player, and the Apple Watch smartwatch. Apple's consumer software includes the OS X and iOS operating systems, the iTunes media player, the Safari web browser, and the iLife and iWork creativity and productivity suites. Its online services include the iTunes Store, the iOS App Store and Mac App Store, and iCloud.

Apple was founded by Steve Jobs, Steve Wozniak, and Ronald Wayne on April 1, 1976, to develop and sell personal computers. It was incorporated as Apple Computer, Inc. on January 3, 1977, and was renamed as Apple Inc. on January 9, 2007, to reflect its shifted focus toward consumer electronics. Apple (NASDAQ: AAPL) joined the Dow Jones Industrial Average on March 19, 2015.

2015, Inc.

2015, Inc. also known as 2015 (pronounced "twenty-fifteen") and 2015 Games is an American video game development company, best known for developing the highly successful video game Medal of Honor: Allied Assault, published by Electronic Arts.

History

2015, Inc. was founded by Tom Kudirka in 1997. He assembled a team of developers by researching people who were participating in the FPS MOD community. After months of working online and mostly only communicating via ICQ instant messenger his team created a Quake Mod as a playable demo to show off their talent. Kudirka sent the demo to Activision who was so impressed with their work they awarded 2015 a contract developing the expansion pack to their upcoming game entitled SiN, developed by Ritual Entertainment.

Kudirka moved all of his team members to Tulsa, Oklahoma to begin work on the expansion pack SiN: Wages of Sin. The seven developers who spent over six months online creating the demo met one another for the first time. Three of the seven developers lived in a house rented by Kudirka where the living-room made up the development studio. The team was Tom Kudirka, Ken Turner, Zied Reike, Carl Glave, Benson Russel, Paul Glave and Michael Boon, who Kudirka relocated from Tasmania Australia to Tulsa, Oklahoma.

Inc. 1

Inc. 1 is an album by pianist John Hicks's Trio recorded in Japan in 1985 and released on the Japanese DIW label.

Reception

The Allmusic review stated "This is an enjoyable date worth picking up".

Track listing

All compositions by John Hicks except as indicated

Personnel

References