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

Uppu

Uppu (Malayalam: ഉപ്പ്, English: Salt, French: Le Sel) is a 1987 Indian Malayalam film directed by V. K. Pavithran and written by K. M. A. Rahim. The film is about atavistic Muslim practice of male polygamy. Film is entirely on the side of the wronged wives, mounting a strong criticism of this aspect of the Muslim religion. It stars P. T. Kunju Muhammed, Jayalalitha, Vijayan Kottarathil and Madhavan. The film won the National Film Award for Best Feature Film in Malayalam.

Plot

Story begins when old patriarch Moosa Meleri arrives in a quiet Kerala village with his adopted son Abu and daughter-in-law Amina. He has lost all his money in litigation. Despite their hardships they are happy until their rich landlord covets Amina. Heartbroken, Amina is forced to divorce Abu and become the landlord's second wife. Twenty years later Amina is alone while her father still indulges in litigations, her son leads a dissolute life and her daughter elopes with the chauffeur.

Cast

Salt River (Arizona)

The Salt River (O'odham [Pima]: Onk Akimel, Yavapai: ʼHakanyacha or Hakathi:) is a stream in the U.S. state of Arizona. It is the largest tributary of the Gila River. The river is about 200 miles (320 km) long. Its drainage basin is about 13,700 square miles (35,000 km²) large. The longest of the Salt River's many tributaries is the 195-mile (314 km) Verde River. The Salt's headwaters tributaries, the Black River and East Fork, increase the river's total length to about 300 miles (480 km).

Course

The Salt River is formed by the confluence of the White River and the Black River in the White Mountains of eastern Gila County. The White and Black rivers, and other tributaries of the upper Salt River, drain the region between the Mogollon Rim in the north and the Natanes Mountains and Natanes Plateau to the east and south. Tributaries of the Salt River also drain the Sierra Ancha and Mazatzal Mountains. The White and Black rivers drain the White Mountains in the Fort Apache Indian Reservation. Together the two rivers drain an area of about 1,900 square miles (4,900 km²). The Salt River, along with the Black River, forms the boundary between the Fort Apache Indian Reservation to the north and the San Carlos Apache Indian Reservation to the south.

Salt (Lizz Wright album)

Salt is the first album by singer and composer Lizz Wright, released in 2003 (see 2003 in music). It reached number two on the Billboard Top Contemporary Jazz chart.

Track listing

Personnel