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While the predominant canopy shape of an umbrella is round, canopy shapes have been streamlined to improve aerodynamic response to wind. Examples include the stealth-shaped canopy of Rizotti [54] (1996), scoop-shaped canopy of Lisciandro [55] (2004), and teardrop-shaped canopies of Hollinger [56] (2004).
The shade of each umbrella is extended in the four corners, with a total area covered of 143,000 square meters. These umbrellas are aimed to protect worshipers from the heat of the sun during prayer, as well as from the risk of slipping and falling in the event of rain. Similar structures are built at the square of the mosques worldwide.
Passively adapted to the temperate-arid climate of southern California, the major design feature of the Solar Umbrella is a shading solar canopy.Rather than deflecting sunlight, this contemporary solar canopy uses 89 amorphous photovoltaic panels to transform the sunlight into usable energy, providing 95% of the residence's electricity.
Awnings were first used by the ancient Egyptian and Syrian civilizations. They are described as "woven mats" that shaded market stalls and homes. A Roman poet Lucretius, in 50 BC, said "Linen-awning, stretched, over mighty theatres, gives forth at times, a cracking roar, when much 'tis beaten about, betwixt the poles and cross-beams".
Canopy over a doorway in Fergana, Uzbekistan Canopied entrance to the New York City Subway at the 14th Street–Union Square station. A canopy is a type of overhead roof or else a structure over which a fabric or metal covering is attached, able to provide shade or shelter from weather conditions such as sun, hail, snow and rain.