Jet stream
Jet streams are fast flowing, narrow air currents found in the upper atmosphere or in troposphere of some planets, including Earth. The main jet streams are located near the altitude of the tropopause. The major jet streams on Earth are westerly winds (flowing west to east). Their paths typically have a meandering shape; jet streams may start, stop, split into two or more parts, combine into one stream, or flow in various directions including the opposite direction of most of the jet. The strongest jet streams are the polar jets, at around 9–12 km (30,000–39,000 ft) above sea level, and the higher and somewhat weaker subtropical jets at around 10–16 km (33,000–52,000 ft). The Northern Hemisphere and the Southern Hemisphere each have a polar jet and a subtropical jet. The northern hemisphere polar jet flows over the middle to northern latitudes of North America, Europe, and Asia and their intervening oceans, while the southern hemisphere polar jet mostly circles Antarctica all year round.
Jetstream (song)
"Jetstream" is a single by New Order. Released through Warner Music on 16 May 2005, it is the second single to be taken from their album Waiting for the Sirens' Call.
The single, an aeroplane/air travel themed track, features Scissor Sisters member Ana Matronic on backing/second vocals.
The single charted at number 30 in the Republic of Ireland, and number 20 in the United Kingdom, down from the positions held by the previous track, "Krafty". The video for the song is the first to feature the band since 1993's "World (The Price of Love)".
Track listings
All songs written and composed by New Order, S. Price and A. Lynch.
Chart positions
References
External links
Jetstream (TV series)
Jetstream is a 2008 documentary television series produced by Paperny Films for the network Discovery Channel Canada. The series totals 8 episodes and premiered on January 8, 2008. The series was narrated by Canadian Actor Kavan Smith.
Seven of the eight pilots are graduates of the Royal Military College of Canada:
The series was released on DVD in 2008.
Synopsis
Jetstream follows eight pilots training with the Royal Canadian Air Force to fly one of the most advanced supersonic tactical fighter jets in the world—the CF-18 Hornet at CFB Cold Lake, Alberta. They train under the 410 Tactical Fighter Training Squadron.
Episodes
DVD
Jetstream was released on DVD in 2008. The DVD box set includes all eight episodes of the series, over 20 minutes of bonus footage, and a preview for the TV series Combat School.
Exposure
Exposure may refer to:
Law and finance
Photography
Science and medicine
Exposure (heights)
Exposure is a climbing and hiking term. Sections of a hiking path or climbing route are described as "exposed" if there is a high risk of injury in the event of a fall because of the steepness of the terrain. If such routes are negotiated without any protection, a false step can result in a serious fall. The negotiation of such routes can cause fear of falling because of the potential danger.
Definitions
What constitutes exposure on a path is fairly obvious, however, an "exposed" location or section of a climbing route is not uniformly or clearly defined in the literature. There are no threshold values, for example, based on the gradient of the terrain, the height of rock faces or the character of an ridge or arête. Authors tend to use their own definition of the terms "exposure" or "exposed" when describing routes, for example:
Exposure
Exposure (photography)
In photography, exposure is the amount of light per unit area (the image plane illuminance times the exposure time) reaching a photographic film or electronic image sensor, as determined by shutter speed, lens aperture and scene luminance. Exposure is measured in lux seconds, and can be computed from exposure value (EV) and scene luminance in a specified region.
In photographic jargon, an exposure generally refers to a single shutter cycle. For example: a long exposure refers to a single, protracted shutter cycle to capture enough low-intensity light, whereas a multiple exposure involves a series of relatively brief shutter cycles; effectively layering a series of photographs in one image. For the same film speed, the accumulated photometric exposure (Hv) should be similar in both cases.
Definitions
Underexposure and overexposure
A photograph may be described as overexposed when it has a loss of highlight detail, that is, when important bright parts of an image are "washed out" or effectively all white, known as "blown-out highlights" or "clipped whites". A photograph may be described as underexposed when it has a loss of shadow detail, that is, when important dark areas are "muddy" or indistinguishable from black, known as "blocked-up shadows" (or sometimes "crushed shadows", "crushed blacks", or "clipped blacks", especially in video). As the image to the right shows, these terms are technical ones. There are three types of settings they are manual, automatic and exposure compensation.
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