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