Wedge
Wedge, The Wedge, or Wedges may refer to:
Art and entertainment
Fictional characters
Music
Linguistics
Mathematics
), a symbol which is interpreted as logical conjunction ("and")
Side cap
A side cap is a foldable military cap with straight sides and a creased or hollow crown sloping to the back where it is parted. It is known as a garrison cap or flight cap (in the United States), a wedge cap (in Canada), or officially field service cap (in the United Kingdom and Commonwealth countries), but it is more generally known as the side cap. It follows the style which originated with the so-called Austrian Cap in the 1890s. There was also a previous version known as the 'Torin', which had a much more curved top line when viewed from the side. Both Austrian and Torin types were distinguished by the inclusion of a fold-down section for warming the ears and back of the head in inclement weather. These two styles are still used by officers of some British units and continue to include this feature. In appearance the cap is similar to the Glengarry, but differs by a lack of the tartan, or check trim, toorie, and ribbons typical of the Scottish cap. It has been associated with various military forces from the time of World War I to the present day, and various youth organizations. A convenient feature of this cap is that when the owner is indoors and no coat-hook is available, it can be easily stored (by folding it over the belt or, unofficially, by tucking it under a shoulder strap).
Wedge prism
The wedge prism is a prism with a shallow angle between its input and output surfaces. This angle is usually 3 degrees or less. Refraction at the surfaces causes the prism to deflect light by a fixed angle. When viewing a scene through such a prism, objects will appear to be offset by an amount that varies with their distance from the prism.
Deflection angle
For a wedge prism in air, rays of light passing through the prism are deflected by the angle δ, which is approximately given by
where n is the index of refraction of the prism material, and α is the angle between the prism's surfaces.
Applications
The term "optical wedge" refers to any shallow angle between two plane surfaces of a window. This wedge may range from a few millionths of a degree of perfect parallelism to as much as three degrees of angle. Even though high-precision optics, such as optical flats, may be lapped and polished to extremely high levels of parallelism, nearly all optics with parallel faces have some slight wedge. This margin of error is usually listed in minutes or seconds of arc. Windows manufactured with an intentional wedge are often referred to as wedge prisms, and typically come with wedge angles of one, two, or three degrees. Many applications exist for wedge prisms, including laser-beam steering, rangefinding and variable focusing.
Traces (book)
Traces is a collection of short stories written by British sci-fi author Stephen Baxter. Unlike similar collections such as Vacuum Diagrams and Phase Space, it is not related to any particular series by Baxter (as, for example, Vacuum Diagrams is related to his Xeelee Sequence).
The book contains the following short stories:
Traces (song)
"Traces" is a 1968 song by the American rock band Classics IV. Released as a single in January 1969, the song served as the title track off their Traces album. It was written by Buddy Buie, J. R. Cobb and Emory Gordy, Jr. The song peaked at position 2 on both the Billboard Hot 100 and Adult Contemporary music charts, making it the highest charting single by the Classics IV, charting even higher than that of "Spooky", "Stormy" and "Everyday With You Girl".
Soul singer Billy Paul covered the song on his 1970 album Ebony Woman.
"Traces" received the honor of being listed in BMI's Top 100 Songs of the Century at number 32.
Chart history
References
External links
Traces (Karine Polwart album)
Traces is the fifth studio album by Scottish folk musician Karine Polwart, released in 2012. It was her first solo album in four years, though in the meantime she had appeared as part of the collaborations Darwin Song Project, The Burns Unit and The Fruit Tree Foundation.
The album included a new recording of "We're All Leaving" (previously recorded as part of the Darwin Song Project) and nine new songs, including tracks inspired by the Occupy London protests ("King of Birds"), Donald Trump's controversial golf course development in Aberdeenshire ("Cover Your Eyes") and the 1982 murder of Susan Maxwell ("Half a Mile"). More whimsically, "Tinsel Show" is about Grangemouth Refinery. "Tears for Lot's Wife" is based on a poem by Anna Akhmatova. Although all of Polwart's albums except Fairest Floo'er were released with lyric booklets, Traces was the first to also contain liner notes explaining the background to all of the songs.
The album was Polwart's first official UK Top 75 entry, peaking at number 57.
