Energy (signal processing)

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

the energy E_s 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 E_s would appear as volt2·seconds, which is not dimensionally correct for energy in the sense of the physical sciences. After dividing E_s 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

Modern

Modern may refer to:

  • Modern history
  • Early Modern period
  • Late Modern period
  • 18th century
  • 19th century
  • 20th century
  • Contemporary history
  • Moderns, a faction of Freemasonry that existed in the 18th century
  • Modernity, a loosely defined concept delineating a number of societal, economic and ideological features that contrast with "pre-modern" times or societies
  • Late modernity
  • Modernism
  • Modernist poetry
  • Modern art, a form of art
  • Modern dance, a dance form developed in the early 20th century
  • Modern architecture, a broad movement and period in architectural history
  • Modern music (disambiguation)
  • Geography

  • Modra, a Slovak city, referred to in the German language as "Modern"
  • Fonts

  • Modern (typeface), a raster font packaged with Windows XP
  • Another name for the typeface classification known as Didone (typography)
  • Modern, a generic font family name for fixed-pitch serif and sans serif fonts (for example, Courier and Pica), used e.g. in OpenDocument format or Rich Text Format
  • Modern (Amber Smith album)

    Modern is the sixth studio album recorded by Amber Smith. The album was released on 6th April 2015 by the German Kalinkaland Records. This was the first record with guitarist Tamás Faragó and bassist Oleg Zubkov.

    Track listing

  • "The Day After
  • " Barking Dog
  • " Hold On To Your Love
  • " Let Go
  • " Flame To The Fire
  • " Memories of TV
  • " Same Old Tune
  • " Batman vs Joker
  • " The Return
  • " Into the Blue
  • Personnel

    The following people contributed to Modern:

    References

    External links

  • Amber Smith at Kalinkaland's webpage
  • Amber Smith at Amber Smith's webpage
  • Didone (typography)

    Didone is a genre of serif typeface that emerged in the late 18th century and is particularly popular in Europe. It is characterized by:

  • Narrow and unbracketed (hairline) serifs. (The serifs have a constant width along their length.)
  • Vertical orientation of weight axes. (The vertical strokes of letters are thick.)
  • Strong contrast between thick and thin lines. (Horizontal parts of letters are thin in comparison to the vertical parts.)
  • Some stroke endings show ball terminals. (Many lines end in a teardrop or circle shape, rather than a plain wedge-shaped serif.)
  • An unornamented, "modern" appearance.
  • The category is also known as modern or modern face serif fonts, in contrast to old style serif designs, which date to the Renaissance period.

    History

    Didone types were developed by printers including Firmin Didot, Giambattista Bodoni and Justus Erich Walbaum, whose eponymous typefaces, Bodoni, Didot, and Walbaum, remain in use today. Their goals were to create more elegant, classical designs of printed text, developing the work of John Baskerville in Birmingham and Fournier in France towards a more extreme, precise design with intense precision and contrast, showing off the increasingly refined printing and paper-making technologies of the period. These trends were also accompanied by changes to page layout conventions and the abolition of the long s.

    Podcasts:

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