1.
Diameter
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In geometry, a diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. It can also be defined as the longest chord of the circle, both definitions are also valid for the diameter of a sphere. In more modern usage, the length of a diameter is called the diameter. In this sense one speaks of the rather than a diameter, because all diameters of a circle or sphere have the same length. Both quantities can be calculated efficiently using rotating calipers, for a curve of constant width such as the Reuleaux triangle, the width and diameter are the same because all such pairs of parallel tangent lines have the same distance. For an ellipse, the terminology is different. A diameter of an ellipse is any chord passing through the midpoint of the ellipse, for example, conjugate diameters have the property that a tangent line to the ellipse at the endpoint of one of them is parallel to the other one. The longest diameter is called the major axis, the word diameter is derived from Greek διάμετρος, diameter of a circle, from διά, across, through and μέτρον, measure. It is often abbreviated DIA, dia, d, or ⌀, the definitions given above are only valid for circles, spheres and convex shapes. However, they are cases of a more general definition that is valid for any kind of n-dimensional convex or non-convex object. The diameter of a subset of a space is the least upper bound of the set of all distances between pairs of points in the subset. So, if A is the subset, the diameter is sup, if the distance function d is viewed here as having codomain R, this implies that the diameter of the empty set equals −∞. Some authors prefer to treat the empty set as a case, assigning it a diameter equal to 0. For any solid object or set of scattered points in n-dimensional Euclidean space, in medical parlance concerning a lesion or in geology concerning a rock, the diameter of an object is the supremum of the set of all distances between pairs of points in the object. In differential geometry, the diameter is an important global Riemannian invariant, the symbol or variable for diameter, ⌀, is similar in size and design to ø, the Latin small letter o with stroke. In Unicode it is defined as U+2300 ⌀ Diameter sign, on an Apple Macintosh, the diameter symbol can be entered via the character palette, where it can be found in the Technical Symbols category. The character will not display correctly, however, since many fonts do not include it. In many situations the letter ø is a substitute, which in Unicode is U+00F8 ø
2.
Column
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A column or pillar in architecture and structural engineering is a structural element that transmits, through compression, the weight of the structure above to other structural elements below. In other words, a column is a compression member, the term column applies especially to a large round support with a capital and a base or pedestal and made of stone, or appearing to be so. A small wooden or metal support is called a post. For the purpose of wind or earthquake engineering, columns may be designed to resist lateral forces, other compression members are often termed columns because of the similar stress conditions. Columns are frequently used to support beams or arches on which the parts of walls or ceilings rest. In architecture, column refers to such an element that also has certain proportional. A column might also be an element not needed for structural purposes, many columns are engaged. All significant Iron Age civilizations of the Near East and Mediterranean made some use of columns, egyptian columns are famously present in the Great Hypostyle Hall of Karnak, where 134 columns are lined up in 16 rows, with some columns reaching heights of 24 metres. Some of the most elaborate columns in the ancient world were those of the Persians and they included double-bull structures in their capitals. The Hall of Hundred Columns at Persepolis, measuring 70 ×70 metres, was built by the Achaemenid king Darius I, many of the ancient Persian columns are standing, some being more than 30 metres tall. The Minoans used whole tree-trunks, usually turned upside down in order to prevent re-growth, stood on a set in the stylobate. These were then painted as in the most famous Minoan palace of Knossos, the Minoans employed columns to create large open-plan spaces, light-wells and as a focal point for religious rituals. These traditions were continued by the later Mycenaean civilization, particularly in the megaron or hall at the heart of their palaces. Being made of wood these early columns have not survived, but their bases have and through these we may see their use. The Greeks developed the classical orders of architecture, which are most easily distinguished by the form of the column and their Doric, Ionic, and Corinthian orders were expanded by the Romans to include the Tuscan and Composite orders. Columns, or at least large structural exterior ones, became less significant in the architecture of the Middle Ages. Early columns were constructed of stone, some out of a piece of stone. Monolithic columns are among the heaviest stones used in architecture, other stone columns are created out of multiple sections of stone, mortared or dry-fit together
3.
Arch
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An arch is a curved structure that spans a space and may or may not support weight above it. Arch may be synonymous with vault, but a vault may be distinguished as a continuous arch forming a roof, an arch is a pure compression form. It can span an area by resolving forces into compressive stresses and. This is sometimes referred to as arch action, as the forces in the arch are carried to the ground, the arch will push outward at the base, called thrust. As the rise, or height of the arch decreases, the outward thrust increases, in order to maintain arch action and prevent the arch from collapsing, the thrust needs to be restrained, either with internal ties or external bracing, such as abutments. The most common true arch configurations are the arch, the two-hinged arch. The fixed arch is most often used in reinforced concrete bridge and tunnel construction, because it is subject to additional internal stress caused by thermal expansion and contraction, this type of arch is considered to be statically indeterminate. The two-hinged arch is most often used to long spans. This type of arch has pinned connections at the base, unlike the fixed arch, the pinned base is able to rotate, allowing the structure to move freely and compensate for the thermal expansion and contraction caused by changes in outdoor temperature. However, this can result in additional stresses, so the two-hinged arch is also statically indeterminate, the three-hinged arch is not only hinged at its base, like the two-hinged arch, but at the mid-span as well. The additional connection at the mid-span allows the arch to move in two opposite directions and compensate for any expansion and contraction. This type of arch is not subject to additional stress caused by thermal change. The three-hinged arch is said to be statically determinate. It is most often used for structures, such as large building roofs. Another advantage of the arch is that the pinned bases are more easily developed than fixed ones, allowing for shallow. Arches have many forms, but all fall into three categories, circular, pointed, and parabolic. Arches can also be configured to produce vaults and arcades, Arches with a circular form, also referred to as rounded arches, were commonly employed by the builders of ancient, heavy masonry arches. Ancient Roman builders relied heavily on the arch to span large
4.
Roof
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A roof is part of a building envelope. It is the covering on the uppermost part of a building or shelter which provides protection from animals and weather, notably rain or snow, the word also denotes the framing or structure which supports that covering. In most countries a roof protects primarily against rain, a verandah may be roofed with material that protects against sunlight but admits the other elements. The roof of a garden conservatory protects plants from cold, wind, and rain, a roof may also provide additional living space, for example a roof garden. Old English hrof roof, ceiling, top, summit, heaven, sky, also figuratively, highest point of something, there are no apparent connections outside the Germanic family. English alone has retained the word in a sense, for which the other languages use forms corresponding to OE. In many parts of the ceramic tiles have been the predominant roofing material for centuries. Other roofing materials include asphalt, coal tar pitch, EPDM rubber, Hypalon, polyurethane foam, PVC, slate, Teflon fabric, TPO, and wood shakes and shingles. The construction of a roof is determined by its method of support and how the space is bridged. The pitch is the angle at which the roof rises from its lowest to highest point, most US domestic architecture, except in very dry regions, has roofs that are sloped, or pitched. Although modern construction such as drainpipes may remove the need for pitch, roofs are pitched for reasons of tradition. So the pitch is dependent upon stylistic factors, and partially to do with practicalities. Some types of roofing, for example thatch, require a steep pitch in order to be waterproof, other types of roofing, for example pantiles, are unstable on a steeply pitched roof but provide excellent weather protection at a relatively low angle. In regions where there is rain, an almost flat roof with a slight run-off provides adequate protection against an occasional downpour. Drainpipes also remove the need for a sloping roof, a person that specializes in roof construction is called a roofer. The shape of roofs differs greatly from region to region, the main factors which influence the shape of roofs are the climate and the materials available for roof structure and the outer covering. The basic shapes of roofs are flat, mono-pitched, gabled, hipped, butterfly, there are many variations on these types. Roofs constructed of sections that are sloped are referred to as pitched roofs
5.
Puente Nuevo
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The Puente Nuevo is the newest and largest of three bridges that span the 120-metre -deep chasm that carries the Guadalevín River and divides the city of Ronda, in southern Spain. The architect was José Martin de Aldehuela, who died in Málaga in 1802, the chief builder was Juan Antonio Díaz Machuca. The construction of the newest bridge was started in 1759 and took 34 years to build, there is a chamber above the central arch that was used for a variety of purposes, including as a prison. The chamber is entered through a building that was once the guard-house. It now contains an exhibition describing the history and construction. Unfortunately, this bridge was quickly and poorly built and in 1741 the entire bridge collapsed resulting in the death of 50 people, Puente Viejo Ronda Guadalevín Comprehensive tourist information about Puente Nuevo in English
6.
Bullfighting
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Bullfighting is a physical contest that generally involves humans attempting to publicly subdue, immobilise, or kill a bull, usually according to a set of rules, guidelines, or cultural expectations. Although people commonly think of Spanish-style bullfighting as representative of bullfighting, there are different forms. Some forms involve dancing around or over a cow or bull, Bullfighting is a traditional spectacle of many countries including Spain, Portugal, parts of southern France, India and Tanzania, and some Latin American countries. In some locations, a breed of cattle, the Spanish Fighting Bull, is used for bullfighting. These bulls must be bred in large ranches, and in conditions as similar as possible to the way they would behave in the wild, there are many historic fighting venues in the Iberian Peninsula, France and Latin America. Bullfighting traces its roots to prehistoric bull worship and sacrifice in Mesopotamia, the first recorded bullfight may be the Epic of Gilgamesh, which describes a scene in which Gilgamesh and Enkidu fought and killed the Bull of Heaven. Bull leaping was portrayed in Crete, and myths related to bulls throughout Greece, the killing of the sacred bull is the essential central iconic act of Mithras, which was commemorated in the mithraeum wherever Roman soldiers were stationed. The oldest representation of what seems to be a man facing a bull is on the Celtiberian tombstone from Clunia, Bullfighting is often linked to Rome, where many human-versus-animal events were held as competition and entertainment, the Venationes. These hunting games spread to Africa, Europe and Asia during Roman times, there are also theories that it was introduced into Hispania by the Emperor Claudius, as a substitute for gladiators, when he instituted a short-lived ban on gladiatorial combat. The latter theory was supported by Robert Graves Spanish colonists took the practice of breeding cattle and bullfighting to the American colonies, in the 19th century, areas of southern and southwestern France adopted bullfighting, developing their own distinctive form. Religious festivities and royal weddings were celebrated by fights in the plaza, where noblemen would ride competing for royal favor. In the Middle Ages across Europe, knights would joust in competitions on horseback, in Spain, they began to fight bulls. In medieval Spain bullfighting was considered a sport and reserved to the rich. The bull was released into an arena where a single fighter on horseback was armed with a lance. This spectacle was said to be enjoyed by Charlemagne, Alfonso X the Wise, the greatest Spanish performer of this art is said to have been El Cid knight. According chronicle of the time, in 1128, when Alfonso VII of León and Castile married Berengaria of Barcelona daughter of Ramon Berenguer III, Count of Barcelona at Saldaña among other celebrations, there were also bullfights. This type of fighting drew more attention from the crowds, thus the modern corrida, or fight, began to take form, as riding noblemen were replaced by commoners on foot. This new style prompted the construction of dedicated bullrings, initially square, like the Plaza de Armas, the modern style of Spanish bullfighting is credited to Juan Belmonte, generally considered the greatest matador of all time
7.
Pedro Romero
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Pedro Romero Martínez was a legendary bullfighter from the Romero family in Ronda, Spain. His grandfather Francisco is credited with advancing the art of using the muleta, his father, as a youth he participated in bullfights in Algeciras and in Seville in 1772, and in Madrid, with his father and Costillares, in 1775. In the following year he killed 285 bulls, establishing his reputation and he allegedly fought 5,558 bulls without incurring serious injury before retiring in 1799. He was known as the first matador to present the bullfight as an art form as well as a display of courage, after retiring, Romero was appointed the head of a bullfighting school in Seville. Although the school lasted only from 1830 to 1832, it had an enormous influence where Romero offered his knowledge to matadors-in-training and he is credited with invention of the classical style of bullfighting in the School of Ronda and Pedro Romeros name is inseparable from the Plaza de Toros. He killed numerous bulls in a bullring in Madrid at the age of eighty, hemingway, in his novel Fiesta, The Sun Also Rises, portrays a beautiful and very artful bullfighter whom he names Pedro Romero, presumably after Pedro Romero Martinez
8.
Bull
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A bull is an intact adult male of the species Bos taurus. Usage of these terms varies considerably with area and dialect, colloquially, people unfamiliar with cattle may refer to both castrated and intact animals as bulls. A wild, young, unmarked bull is known as a micky in Australia, improper or late castration on a bull results in it becoming a coarse steer, also known as a stag in Australia, Canada and New Zealand. In some countries an incompletely castrated male is also as a rig or ridgling. The word bull also denotes the males of other bovines, including bison and water buffalo as well as other species of large animals including elephants, camels, elk, moose. Bulls are much more muscular than cows, with bones, larger feet, a very muscular neck. These features assist bulls in fighting for domination over a herd, the hair is generally shorter on the body, but on the neck and head there is often a mane of curlier, wooly hair. Bulls are usually about the height as cows or a little taller. In horned cattle the horns of bulls tend to be thicker and somewhat shorter than those of cows, and in many breeds they curve outwards in a flat arc rather than upwards in a lyre shape. It is not true, as is believed, that bulls have horns and cows do not. Bulls become fertile at about seven months of age, given the small amount of erectile tissue, there is little enlargement after erection. The penis is quite rigid when non-erect, and becomes more rigid during erection. Protrusion is not affected much by erection, but more by relaxation of the retractor penis muscle, Bulls are occasionally affected by a condition known as corkscrew penis. The penis of a bull is about 3–4 cm in diameter. The bulls glans penis has a rounded and elongated shape, a common misconception widely repeated in depictions of bull behavior is that the color red angers bulls, inciting them to charge. In fact, like most mammals, cattle are red-green color blind, in bullfighting, it is the movement of the matadors cape, and not the color, which provokes a reaction in the bull. Other than the few bulls needed for breeding, the vast majority of cattle are slaughtered for meat before the age of three years. Most of these animals are castrated as calves to reduce aggressive behavior and prevent unwanted mating
