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

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

Energy (Melissa Manchester song)

"Energy" is a song performed by American singer Melissa Manchester, from her 1985 album Mathematics.

Details

The song was arranged by veteran songwriter Greg Mathieson and was released as the second single from the album, following the underperformance of the lead single "Mathematics", MCA hoped to reverse the album's fortune by releasing this Hi-NRG track with an aim for the club market.

Melissa Manchester filmed a videoclip to promote the song, which sees the singer and her band in a sort of industrial-setting stage performing the song.

The single was released on 7" and 12" formats featuring remixes, but it failed to chart either on the Billboard Hot 100 or the dance charts, and failed to chart elsewhere. The b-side to the single was a non-album song, called "So Full Of Yourself", which was co-written by Manchester and Tom Snow and used as the b-side to all 3 singles off the album.

Track listings

Shade (Holly Cole album)

Shade is a studio album by Holly Cole. It was released in Canada in 2003 on Alert Records.

Track listing

References

Shade (Silverchair song)

"Shade" is a song by Australian alternative rock band Silverchair. It was released as the fourth single from their debut album, Frogstomp, in 1995. It was the group's only single not chosen to be on their compilation album The Best of Volume 1.

Track listing

Australian CD single (MATTCD014)

The single is no longer available and is considered a rarity.

Charts

References

External links

Silverwing (series)

The Silverwing Book Series is a series of books by Kenneth Oppel featuring the adventures of a young bat, Shade. The books are commonly assigned in the curriculum of upper elementary and middle school grades in Canada.

Summary

Great war

The great war between the birds and the beasts happened approximately 65 million years before the story (at the end of the dinosaurs). The bats, seeing themselves as being both, but neither, refrained from fighting. At the end of the war, the two warring factions banished the bats. They could not see the sun again because they refrained. The war is based upon a fable by Aesop called "The Birds, the Beasts and the Bat."

Sun Freedom