Energy (journal)

Energy is a peer-reviewed academic journal covering research on energy engineering that was established in 1976. It is published by Elsevier and the editor-in-chief is Henrik Lund (Aalborg University). According to the Journal Citation Reports, the journal has a 2013 impact factor of 4.159, ranking it 13th out of 83 journals in the category "Energy & Fuels" and second out of 55 journals in "Thermodynamics".

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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

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.

Saudia Flight 163

Saudia Flight 163 was a scheduled passenger flight of Saudia that caught fire after takeoff from Riyadh International Airport (now the Riyadh Air Base) on a flight to Jeddah, Saudi Arabia on Tuesday, 19 August 1980. All 287 passengers and 14 crew on board the Lockheed L-1011-200 TriStar, registration HZ-AHK, died after the aircraft made an emergency landing back at the Riyadh airport.

At the time, the accident was the second deadliest single aircraft disaster in history, after Turkish Airlines Flight 981. It's the sixth deadliest aircraft disaster overall, after the Tenerife airport disaster, Japan Airlines Flight 123, the Charkhi Dadri mid-air collision, Turkish Airlines Flight 981, and Air India Flight 182. It was also the highest death toll of any aviation accident in Saudi Arabia and the highest death toll of any accident involving a Lockheed L-1011 TriStar anywhere in the world. It is also the deadliest aviation disaster that did not involve a crash on impact or mid-flight break up.

Charkhi Dadri mid-air collision

The Charkhi Dadri mid-air collision occurred on 12 November 1996 over the village of Charkhi Dadri, to the west of New Delhi, India. The aircraft involved were a Saudi Arabian Airlines Boeing 747-100B en route from Delhi to Dhahran, Saudi Arabia, and a Kazakhstan Airlines Ilyushin Il-76 en route from Chimkent, Kazakhstan, to Delhi. The crash killed all 349 people on board both planes, making it the world's deadliest mid-air collision, the deadliest aviation accident to occur in India, and the third-deadliest aircraft accident in the history of aviation, behind only the Tenerife airport disaster and Japan Airlines Flight 123.

Collision

The Saudi Arabian Airlines (Saudia) Boeing 747-168B, registration HZ-AIH, was due to operate the first leg of a scheduled international Delhi–Dhahran–Jeddah passenger service as Flight 763 (SVA763) with 312 occupants on board; the Kazakhstan Airlines Ilyushin Il-76TD, registration UN-76435, was on a charter service from Chimkent to Delhi as KZA1907. SVA763 departed Delhi at 18:32 local time. KZA1907 was, at the same time, descending to land at Delhi. Both flights were controlled by approach controller VK Dutta. The crew of SVA763 consisted of Captain Khalid Al Shubaily, First Officer Nazir Khan, and Flight Engineer Edris. On KZA1907, Gennadi Cherepanov served as the pilot and Egor Repp served as the radio operator.