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Promptuary Diagram 2
The promptuary, also known as the ''card abacus'' is a calculating machine invented by the 16th-century Scottish mathematician John Napier and described in his book '' Rabdologiae'' in which he also described Napier's bones. It is an extension of Napier's Bones, using two sets of rods to achieve multi-digit multiplication without the need to write down intermediate results, although some mental addition is still needed to calculate the result. The rods for the multiplicand are similar to Napier's Bones, with repetitions of the values. The set of rods for the multiplier are shutters or masks for each digit placed over the multiplicand rods. The results are then tallied from the digits showing as with other lattice multiplication methods. The final form described by Napier took advantage of symmetries to compact the rods, and used the materials of the day to hold system of metal plates, placed inside a wooden frame. Design of the Promptuary The promptuary consists of four parts: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calculating Machine
A mechanical calculator, or calculating machine, is a mechanical device used to perform the basic operations of arithmetic automatically, or (historically) a simulation such as an analog computer or a slide rule. Most mechanical calculators were comparable in size to small desktop computers and have been rendered obsolete by the advent of the electronic calculator and the digital computer. Surviving notes from Wilhelm Schickard in 1623 reveal that he designed and had built the earliest of the modern attempts at mechanizing calculation. His machine was composed of two sets of technologies: first an abacus made of Napier's bones, to simplify multiplications and divisions first described six years earlier in 1617, and for the mechanical part, it had a dialed pedometer to perform additions and subtractions. A study of the surviving notes shows a machine that would have jammed after a few entries on the same dial, and that it could be damaged if a carry had to be propagated over a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madrid
Madrid ( , ) is the capital and most populous city of Spain. The city has almost 3.4 million inhabitants and a metropolitan area population of approximately 6.7 million. It is the second-largest city in the European Union (EU), and its monocentric metropolitan area is the third-largest in the EU.United Nations Department of Economic and Social AffairWorld Urbanization Prospects (2007 revision), (United Nations, 2008), Table A.12. Data for 2007. The municipality covers geographical area. Madrid lies on the River Manzanares in the central part of the Iberian Peninsula. Capital city of both Spain (almost without interruption since 1561) and the surrounding autonomous community of Madrid (since 1983), it is also the political, economic and cultural centre of the country. The city is situated on an elevated plain about from the closest seaside location. The climate of Madrid features hot summers and cool winters. The Madrid urban agglomeration has the second-la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanical Calculators
Mechanical may refer to: Machine * Machine (mechanical), a system of mechanisms that shape the actuator input to achieve a specific application of output forces and movement * Mechanical calculator, a device used to perform the basic operations of arithmetic * Mechanical energy, the sum of potential energy and kinetic energy * Mechanical system, a system that manages the power of forces and movements to accomplish a task * Mechanism (engineering), a portion of a mechanical device Other * Mechanical (character), one of several characters in Shakespeare's ''A Midsummer Night's Dream'' * A kind of typeface in the VOX-ATypI classification See also * Machine, especially in opposition to an electronic item * ''Mechanical Animals'', the third full-length studio release by Marilyn Manson * Manufactured or artificial, especially in opposition to a biological or natural component * Automation, using machine decisions and processing instead of human * Mechanization, using machine labor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kensington
Kensington is a district in the Royal Borough of Kensington and Chelsea in the West of Central London. The district's commercial heart is Kensington High Street, running on an east–west axis. The north-east is taken up by Kensington Gardens, containing the Albert Memorial, the Serpentine Gallery and Speke's monument. South Kensington and Gloucester Road are home to Imperial College London, the Royal College of Music, the Royal Albert Hall, Natural History Museum, Victoria and Albert Museum, and Science Museum. The area is also home to many embassies and consulates. Name The manor of ''Chenesitone'' is listed in the Domesday Book of 1086, which in the Anglo-Saxon language means "Chenesi's ton" (homestead/settlement). One early spelling is ''Kesyngton'', as written in 1396. History The manor of Kensington, in the county of Middlesex, was one of several hundred granted by King William the Conqueror (1066-1089) to Geoffrey de Montbray (or Mowbray), Bishop of Coutances in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biblioteca Nacional De España
The Biblioteca Nacional de España (''National Library of Spain'') is a major public library, the largest in Spain, and one of the largest in the world. It is located in Madrid, on the Paseo de Recoletos. History The library was founded by King Philip V in 1711 as the Palace Public Library (Biblioteca Pública de Palacio). The Royal Letters Patent that he granted, the predecessor of the current legal deposit requirement, made it mandatory for printers to submit a copy of every book printed in Spain to the library. In 1836, the library's status as Crown property was revoked and ownership was transferred to the Ministry of Governance (Ministerio de la Gobernación). At the same time, it was renamed the Biblioteca Nacional. During the 19th century, confiscations, purchases and donations enabled the Biblioteca Nacional to acquire the majority of the antique and valuable books that it currently holds. In 1892 the building was used to host the Historical American Exposition. On ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prince Of Wales
Prince of Wales ( cy, Tywysog Cymru, ; la, Princeps Cambriae/Walliae) is a title traditionally given to the heir apparent to the English and later British throne. Prior to the conquest by Edward I in the 13th century, it was used by the rulers of independent Wales. The first native Welsh prince was Gruffudd ap Cynan of Gwynedd, in 1137, although his son Owain Gwynedd (Owain ap Gruffudd) is often cited as having established the title. Llywelyn the Great is typically regarded as the strongest leader, holding power over the vast majority of Wales for 45 years. One of the last independent princes was Llywelyn ap Gruffydd (Llywelyn the Last), who was killed at the Battle of Orewin Bridge in 1282. His brother, Dafydd ap Gruffydd, was executed the following year. After these two deaths, Edward I of England invested his son Edward of Caernarfon as the first English prince of Wales in 1301. The title was later claimed by the heir of Gwynedd, Owain Glyndŵr (Owain ap Gruffydd), f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philip II Of Spain
Philip II) in Spain, while in Portugal and his Italian kingdoms he ruled as Philip I ( pt, Filipe I). (21 May 152713 September 1598), also known as Philip the Prudent ( es, Felipe el Prudente), was King of Spain from 1556, King of Portugal from 1580, and King of Naples and Sicily from 1554 until his death in 1598. He was '' jure uxoris'' King of England and Ireland from his marriage to Queen Mary I in 1554 until her death in 1558. He was also Duke of Milan from 1540. From 1555, he was Lord of the Seventeen Provinces of the Netherlands. The son of Emperor Charles V and Isabella of Portugal, Philip inherited his father's Spanish Empire in 1556 and succeeded to the Portuguese throne in 1580 following a dynastic crisis. The Spanish conquests of the Inca Empire and of the Philippines, named in his honor by Ruy López de Villalobos, were completed during his reign. Under Philip II, Spain reached the height of its influence and power, sometimes called the Spanish Golden Age, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spanish Royal Academy Of Sciences
The Spanish Royal Academy of Sciences (Spanish: ''Real Academia de Ciencias Exactas, Físicas y Naturales'') is an academic institution and learned society that was founded in Madrid in 1847. It is dedicated to the study and research of mathematics, physics, chemistry, biology, engineering, and related sciences. History The forerunner of the modern Academy of Sciences, the Academy of Mathematics, was created in Madrid in 1582, during the reign of Philip II. It evolved from the environment of cooperation among the cosmographers, architects and civil engineers that served the monarch, and also involved prominent artillery experts and military engineers. The initiative was motivated by an interest that existed in the Spain of the late sixteenth century in promoting the teaching of mathematics with an eye to its practical applications in areas as diverse as mercantile calculation, cosmography, astrology on one hand, and the art of navigation and specific problems relating to mil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diccionario Enciclopédico Hispano-americano De Literatura, Ciencias Y Artes
The ''Diccionario enciclopédico hispano-americano de literatura, ciencias y artes'' (1887–99) was a Spanish language general encyclopedia produced by Montaner y Simón in Barcelona, Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , i .... References Further reading * External links * (fulltext) Spanish encyclopedias 1887 non-fiction books Spanish online encyclopedias Reference works in the public domain 19th-century encyclopedias {{encyclopedia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyhedron
In geometry, a polyhedron (plural polyhedra or polyhedrons; ) is a three-dimensional shape with flat polygonal faces, straight edges and sharp corners or vertices. A convex polyhedron is the convex hull of finitely many points, not all on the same plane. Cubes and pyramids are examples of convex polyhedra. A polyhedron is a 3-dimensional example of a polytope, a more general concept in any number of dimensions. Definition Convex polyhedra are well-defined, with several equivalent standard definitions. However, the formal mathematical definition of polyhedra that are not required to be convex has been problematic. Many definitions of "polyhedron" have been given within particular contexts,. some more rigorous than others, and there is not universal agreement over which of these to choose. Some of these definitions exclude shapes that have often been counted as polyhedra (such as the self-crossing polyhedra) or include shapes that are often not considered as valid polyh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Binomial (polynomial)
In algebra, a binomial is a polynomial that is the sum of two terms, each of which is a monomial. It is the simplest kind of sparse polynomial after the monomials. Definition A binomial is a polynomial which is the sum of two monomials. A binomial in a single indeterminate (also known as a univariate binomial) can be written in the form :a x^m - bx^n \,, where and are numbers, and and are distinct nonnegative integers and is a symbol which is called an indeterminate or, for historical reasons, a variable. In the context of Laurent polynomials, a ''Laurent binomial'', often simply called a ''binomial'', is similarly defined, but the exponents and may be negative. More generally, a binomial may be written as: :a x_1^\dotsb x_i^ - b x_1^\dotsb x_i^ Examples :3x - 2x^2 :xy + yx^2 :0.9 x^3 + \pi y^2 :2 x^3 + 7 Operations on simple binomials *The binomial can be factored as the product of two other binomials: :: x^2 - y^2 = (x - y)(x + y). :This is a special case of the mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Archaeological Museum Of Spain
The National Archaeological Museum ( es, Museo Arqueológico Nacional; MAN) is a museum in Madrid, Spain. It is located on Calle de Serrano beside the Plaza de Colón, sharing its building with the National Library of Spain. History The museum was founded in 1867 by a Royal Decree of Isabella II as a depository for numismatic, archaeological, ethnographical and decorative art collections of the Spanish monarchs. The establishment of the museum was predated by a previous unmaterialised proposal by the Royal Academy of History in 1830 to create a museum of antiquities. The museum was originally located in the Embajadores district of Madrid. In 1895, it moved to a building designed specifically to house it, a neoclassical design by architect Francisco Jareño, built from 1866 to 1892. In 1968, renovation and extension works considerably increased its area. The museum closed for renovation in 2008 and reopened in April 2014. Following a restructuring of the collection in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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