An electrostatic precipitator (ESP) is a filterless device that removes fine particles, such as dust and smoke, from a flowing gas using the force of an induced electrostatic charge minimally impeding the flow of gases through the unit.In contrast to wet scrubbers, which apply energy directly to the flowing fluid medium, an ESP applies energy only to the particulate matter being collected and therefore is very efficient in its consumption of energy (in the form of electricity). Invention of the electrostatic precipitator The first use of corona discharge to remove particles from an aerosol was by Hohlfeld in 1824. However, it was not commercialized until almost a century later. In 1907 Frederick Gardner Cottrell, a professor of chemistry at the University of California, Berkeley, applied for a patent on a device for charging particles and then collecting them through electrostatic attraction—the first electrostatic precipitator. Cottrell first applied the device to the collection of sulphuric acid mist and lead oxide fumes emitted from various acid-making and smelting activities...

In a society, high culture is the subculture that encompasses the cultural objects of aesthetic value, which a society collectively esteem as being exemplary works of art, and the intellectual works of literature and music, history and philosophy, which a society consider representative of their culture.In popular usage, the term high culture identifies the culture either of the upper class (an aristocracy) or of a status class (the intelligentsia); high culture also identifies a society’s common repository of broad-range knowledge and tradition (folk culture) that transcends the social-class system of the society. Sociologically, the term high culture is contrasted with the term low culture, which comprises the forms of popular culture characteristic of the less-educated social classes, such as the barbarians, the Philistines, and hoi polloi (the masses), though very often also enjoyed by the upper classes. Matthew Arnold introduced the term high culture in the book Culture and Anarchy (1869). The Preface defines culture as "the disinterested endeavour after man’s perfection" pursued, obtained, and achieved by effort...

Stellaria media, chickweed, is an annual flowering plant in the family Caryophyllaceae. It is native to Eurasia and naturalized throughout the world, where it is a weed of waste ground, farmland and gardens. It is sometimes grown as a salad crop or for poultry consumption. Description Chickweed is a hardy annual which flowers throughout the year in northern Europe, in mild weather. The stems are terete and glabrous with a lax and sprawling growth habit, up to 400 mm (16 inches) long and 1 mm (0.039 inches) in diameter, with a line (very occasionally 2 lines) of hairs running straight down its length, alternating sides at the nodes. The petioles are 5 to 8 mm long with hairy margins. The leaves are green, hairless, oval and opposite, 6 to 25 mm long by 3 to 10 mm wide with a hydathode at the tip.The flowers are small, about 1 cm in diameter, with 5 bifid white petals, 1-3 mm long, nestled inside the larger (3-5 mm long) sepals. These sepals have long, wavy (villous) hairs on their outer (distal) sides and are oval in shape, and usually 5 in number. There are often only 3 stamens...

O Brother, Where Art Thou? is a 2000 comedy-drama film written, produced, co-edited, and directed by Joel and Ethan Coen. It stars George Clooney, John Turturro, and Tim Blake Nelson, with Chris Thomas King, John Goodman, Holly Hunter, and Charles Durning in supporting roles. The film is set in rural Mississippi during the 1930s, and it follows three escaped convicts searching for hidden treasure while a sheriff relentlessly pursues them. Its story is a modern satire which, while incorporating social features of the American South, is loosely based on Homer's epic Greek poem the Odyssey. Some examples of this include Sirens, a Cyclops, and the main character's name, "Ulysses", which is the Roman name for "Odysseus". The title of the film is a reference to the Preston Sturges 1941 film Sullivan's Travels, in which the protagonist is a director who wants to film O Brother, Where Art Thou?, a fictitious book about the Great Depression.Much of the music used in the film is period folk music. The movie was one of the first to extensively use digital color correction to give the film an autumnal sepia-tinted...