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

British Youth Band Association

The British Youth Band Association, or BYBA, was formed in 1974 by David Loader, John Johnson and Glen Carter. It aims to promote the marching band activity, to encourage the social aspects of bands and to enhance personal development through all aspects of bands. BYBA has also set up rules for contests, and divided all marching bands into classes. The 1992 season saw 117 units marching across the Novice, Contest, Championship and Premier Classes. By the 2003 season, the system had changed into 40 units marching across Divisions 1,2,3,4 and the Cadets league. The 2007 season saw Division 4 renamed as the Junior Division, and the introduction of the Associate division, allowing for units of any age. As of the 2008 season, BYBA runs eight summer contests annually, as well as the National Championships, an Individual & Ensembles Showcase, the 'On The Road' Tour, the Festival Of Fun & Music, and three regional concerts (Northern, Southern, and Midlands). In 2014, The class system was changed to the Premier Class, Championship Class, Associate Class, Traditional Class and Cadet Class

Equinox (comics)

Equinox (Terrance Sorenson) is a fictional character, a supervillain appearing in publications from Marvel Comics.

Publication history

Equinox, the Thermodynamic Man, first appeared in Marvel Team-Up vol. 1 #23 (July, 1974), and was created by Len Wein and Gil Kane. He also appeared in Giant-Size Spider-Man #1, also in July 1974, and a two-part story in Marvel Team-Up vol. 1 #59-60 (July–August 1977).

After a nearly twenty year hiatus, the character subsequently appeared sporadically, appearing in Marvel Comics Presents #147 (February 1994), Code of Honor #1 (January 1997), Spider-Man Unlimited #12 vol. 2 (January 2006), and Heroes for Hire vol. 2 #1 (October 2006). A Skrull impersonator of Equinox appeared in Avengers: The Initiative #12 (June 2008), and #18.

Equinox received an entry in the All-New Official Handbook of the Marvel Universe A-Z #4 (2006).

Fictional character biography

Equinox is an African-American youth who gained superhuman powers due to accidental exposure to his father's malfunctioning equipment after a lab accident. (His mother is Margay Sorenson, head of natural sciences at Bard College.)

Equinox (1993 film)

Equinox is a 1993 film written and directed by Alan Rudolph. It stars Matthew Modine in dual roles, along with Lara Flynn Boyle, Marisa Tomei, Lori Singer and Fred Ward. The film was shot in Minnesota and Utah and is set in the fictional urban city of Empire. It was nominated for four Independent Spirit Awards.

Plot

Henry Petosa and Freddy Ace are identical twins living in the fictional city of Empire with no knowledge of each other, separated at birth and given up for adoption.

Henry is a shy garage mechanic. He lives in a slum and loves Beverly Franks, his best friend's sister. He also baby-sits for his neighbor Rosie, a prostitute.

Freddy is a driver for Mr. Paris, a gangster. He is slick and self-confident, married to a materialistic woman named Sharon.

One day, a young woman named Sonya Kirk who works in a morgue accidentally comes across a letter indicating that the twins are actually the offspring of European nobility and owed a large sum of inheritance money. Sonya decides to play amateur detective and track them down.