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87 (number)
87 (eighty-seven) is the natural number following 86 and preceding 88. In mathematics 87 is: * the sum of the squares of the first four primes (87 = 22 + 32 + 52 + 72). * the sum of the sums of the divisors of the first 10 positive integers. * the thirtieth semiprime, and the twenty-sixth distinct semiprime and the eighth of the form (3.q). * 5! - 4! - 3! - 2! - 1! = 87 In sports * Cricket in Australia holds 87 as a superstitiously unlucky score and is referred to as "the devil's number." This originates from the fact that 87 is 13 runs short of a century. 187, 287 and so on are also considered unlucky but is not as common as 87 on its own. * In the National Hockey League, Wayne Gretzky scored a league-high 87 goals with the Edmonton Oilers in the 1983–84 NHL season. In other fields Eighty-seven is also: *The atomic number of francium. *An answer to a popular puzzle question states 16, 06, 68, 88, xx, 98. The answer is 87 when looked upside down. *The number of years betw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Number
In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country"). Numbers used for counting are called ''Cardinal number, cardinal numbers'', and numbers used for ordering are called ''Ordinal number, ordinal numbers''. Natural numbers are sometimes used as labels, known as ''nominal numbers'', having none of the properties of numbers in a mathematical sense (e.g. sports Number (sports), jersey numbers). Some definitions, including the standard ISO/IEC 80000, ISO 80000-2, begin the natural numbers with , corresponding to the non-negative integers , whereas others start with , corresponding to the positive integers Texts that exclude zero from the natural numbers sometimes refer to the natural numbers together with zero as the whole numbers, while in other writings, that term is used instead for the integers (including negative integers). The natural ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eighty
80 (eighty) is the natural number following 79 and preceding 81. In mathematics 80 is: * the sum of Euler's totient function φ(''x'') over the first sixteen integers. * a semiperfect number, since adding up some subsets of its divisors (e.g., 1, 4, 5, 10, 20 and 40) gives 80. * a ménage number. * palindromic in bases 3 (22223), 6 (2126), 9 (889), 15 (5515), 19 (4419) and 39 (2239). * a repdigit in bases 3, 9, 15, 19 and 39. The Pareto principle (also known as the 80-20 rule) states that, for many events, roughly 80% of the effects come from 20% of the causes... Every solvable configuration of the 15 puzzle can be solved in no more than 80 single-tile moves.A. Brüngger, A. Marzetta, K. Fukuda and J. NievergeltThe parallel search bench ZRAM and its applications ''Annals of Operations Research'' 90 (1999), pp. 45–63. In science * The atomic number of mercury In religion * According to Exodus 7:7, Moses was 80 years old when he initially spoke to Pharaoh o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Never Let Me Down
''Never Let Me Down'' is the 17th studio album by English musician David Bowie, released on 20 April 1987 through EMI America Records. After a series of miscellaneous projects, Bowie hoped to make his next record differently following his disappointment with ''Tonight'' (1984). It was recorded at Mountain Studios in Montreux, Switzerland and the Power Station in New York City from September to November 1986. It was co-produced by Bowie and David Richards and featured contributions from Peter Frampton on guitar. Musically, ''Never Let Me Down'' has been characterised as pop rock, art rock and hard rock; Bowie himself considered the record a return to rock and roll music. The cover artwork features Bowie surrounded by numerous elements from the songs. Released with different runtimes on vinyl and CD, ''Never Let Me Down'' was a commercial success, peaking at No. 6 in the UK. Three singles were released, all of which reached the UK Top 40. Despite this, the album was po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Bowie
David Robert Jones (8 January 194710 January 2016), known professionally as David Bowie ( ), was an English singer-songwriter and actor. A leading figure in the music industry, he is regarded as one of the most influential musicians of the 20th century. Bowie was acclaimed by critics and musicians, particularly for his innovative work during the 1970s. His career was marked by reinvention and visual presentation, and his music and stagecraft had a significant impact on popular music. Bowie developed an interest in music from an early age. He studied art, music and design before embarking on a professional career as a musician in 1963. "Space Oddity", released in 1969, was his first top-five entry on the UK Singles Chart. After a period of experimentation, he re-emerged in 1972 during the glam rock era with his flamboyant and androgynous alter ego Ziggy Stardust (character), Ziggy Stardust. The character was spearheaded by the success of Bowie's single "Starman (song), Starma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Model Railroader
''Model Railroader'' (''MR'') is an American magazine about the hobby of model railroading. Founded in 1934 by Al C. Kalmbach, it is published monthly by Kalmbach Media of Waukesha, Wisconsin. Commonly found on newsstands and in libraries, it promotes itself as the oldest magazine of its type in the United States, although it is the long-standing competitor to ''Railroad Model Craftsman,'' which - originally named ''The Model Craftsman'' - predates MR by one year. ''MR'' is considered to be a general-interest hobby magazine, appealing to a wide range of hobbyists, rather than specializing in a particular scale, or facet of the hobby (such as prototype operations or scratch building and kitbashing). ''Model Railroader'' covers a variety of scales and modeling techniques for engines, rolling stock, right-of-way, structures, and scenery. It reviews products including ready-to-run models as well as kits, tools and supplies. The magazine presents blueprints and photographs of prototyp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
H0 Scale
HO or H0 is a rail transport modelling scale using a 1:87 scale (3.5 mm to 1 foot). It is the most popular scale of model railway in the world. The rails are spaced apart for modelling standard gauge tracks and trains in HO.NMRA"Modeling Scales: Scale and Gauge. ''NMRA.org''. December 2000. Retrieved 4 March 2010. The name H0 comes from 1:87 scale being ''half'' that of 0 scale, which was originally the smallest of the series of older and larger 0, 1, 2 and 3 gauges introduced by Märklin around 1900. Rather than referring to the scale as "half-zero" or "H-zero", English-speakers have consistently pronounced it and have generally written it with the letters HO. In other languages it also remains written with the letter H and number 0 (zero); in German it is thus pronounced as . History After the First World War there were several attempts to introduce a model railway about half the size of 0 scale that would be more suitable for smaller home layouts and cheape ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Model Railroading
Railway modelling (UK, Australia, New Zealand, and Ireland) or model railroading (US and Canada) is a hobby in which rail transport systems are modelled at a reduced scale. The scale models include locomotives, rolling stock, streetcars, tracks, signalling, cranes, and landscapes including: countryside, roads, bridges, buildings, vehicles, harbors, urban landscape, model figures, lights, and features such as rivers, hills, tunnels, and canyons. The earliest model railways were the 'carpet railways' in the 1840s. The first documented model railway was the Railway of the Prince Imperial (French: Chemin de fer du Prince impérial) built in 1859 by emperor Napoleon III for his then 3-year-old son, also Napoleon, in the grounds of the Château de Saint-Cloud in Paris. It was powered by clockwork and ran in a figure-of-eight. Electric trains appeared around the start of the 20th century, but these were crude likenesses. Model trains today are more realistic, in addition to bein ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dmitri Shostakovich
Dmitri Dmitriyevich Shostakovich, , group=n (9 August 1975) was a Soviet-era Russian composer and pianist who became internationally known after the premiere of his Symphony No. 1 (Shostakovich), First Symphony in 1926 and was regarded throughout his life as a major composer. Shostakovich achieved early fame in the Soviet Union, but had a complex relationship with its government. His 1934 opera ''Lady Macbeth of Mtsensk (opera), Lady Macbeth of Mtsensk'' was initially a success, but eventually was Muddle Instead of Music, condemned by the Soviet government, putting his career at risk. In 1948 his work was #Second denunciation, denounced under the Zhdanov Doctrine, with professional consequences lasting several years. Even after his censure was On the Cult of Personality and Its Consequences, rescinded in 1956, performances of his music were occasionally subject to state interventions, as with his Symphony No. 13 (Shostakovich), Thirteenth Symphony (1962). Shostakovich was a m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
24 Preludes And Fugues (Shostakovich)
The 24 Preludes and Fugues, Op. 87 by Dmitri Shostakovich are a set of 24 musical pieces for solo piano, one in each of the major and minor keys of the chromatic scale. The cycle was composed in 1950 and 1951 while Shostakovich was in Moscow, and premiered by pianist Tatiana Nikolayeva in Leningrad in December 1952; it was published the same year. A complete performance takes approximately 2 hours and 32 minutes. It is one of several examples of music written in all major and/or minor keys. Form and structure Each piece is in two parts— a prelude and a fugue—varying in pace, length and complexity (for example, Fugue No. 13 in F major is in five voices, while Fugue No. 9 in E major is in only two voices). The pieces proceed in relative major/minor pairs around the circle of fifths: first C major and A minor (prelude and fugue nos. 1 and 2), then to one sharp (G major, E minor), two sharps (D major, B minor), and so on, ending with D minor (1 flat). Chopin's 24 Preludes, Op ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ISBN
The International Standard Book Number (ISBN) is a numeric commercial book identifier that is intended to be unique. Publishers purchase ISBNs from an affiliate of the International ISBN Agency. An ISBN is assigned to each separate edition and variation (except reprintings) of a publication. For example, an e-book, a paperback and a hardcover edition of the same book will each have a different ISBN. The ISBN is ten digits long if assigned before 2007, and thirteen digits long if assigned on or after 1 January 2007. The method of assigning an ISBN is nation-specific and varies between countries, often depending on how large the publishing industry is within a country. The initial ISBN identification format was devised in 1967, based upon the 9-digit Standard Book Numbering (SBN) created in 1966. The 10-digit ISBN format was developed by the International Organization for Standardization (ISO) and was published in 1970 as international standard ISO 2108 (the 9-digit SBN code ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Filter (photography)
In photography and cinematography, a filter is a camera accessory consisting of an optical filter that can be inserted into the optical path. The filter can be of a square or oblong shape and mounted in a holder accessory, or, more commonly, a glass or plastic disk in a metal or plastic ring frame, which can be screwed into the front of or clipped onto the camera lens. Filters modify the images recorded. Sometimes they are used to make only subtle changes to images; other times the image would simply not be possible without them. In monochrome photography, coloured filters affect the relative brightness of different colours; red lipstick may be rendered as anything from almost white to almost black with different filters. Others change the colour balance of images, so that photographs under incandescent lighting show colours as they are perceived, rather than with a reddish tinge. There are filters that distort the image in a desired way, diffusing an otherwise sharp image, addin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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