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1960
It is also known as the "Year of Africa" because of major events—particularly the independence of seventeen African nations—that focused global attention on the continent and intensified feelings of Pan-Africanism. Events January * January 9– 11 – Aswan Dam construction begins in Egypt. * January 10 – British Prime Minister Harold Macmillan makes the "Wind of Change" speech for the first time, to little publicity, in Accra, Gold Coast (modern-day Ghana). * January 19 – A revised version of the U.S.-Japan Security Treaty, which allows U.S. troops to be based on Japanese soil, is signed in Washington, D.C. by Prime Minister Nobusuke Kishi and President Dwight D. Eisenhower. The new treaty is opposed by the massive Anpo protests in Japan. * January 21 ** Coalbrook mining disaster: A coal mine collapses at Holly Country, South Africa, killing 435 miners. ** Avianca Flight 671 crashes and burns upon landing at Montego Bay, Jamaica killing 37, the worst air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
60 (number)
60 (sixty) () is the natural number following 59 and preceding 61. Being three times 20, it is called '' threescore'' in older literature ('' kopa'' in Slavic, ''Schock'' in Germanic). In mathematics * 60 is a highly composite number. Because it is the sum of its unitary divisors (excluding itself), it is a unitary perfect number, and it is an abundant number with an abundance of 48. Being ten times a perfect number, it is a semiperfect number. * It is the smallest number divisible by the numbers 1 to 6: there is no smaller number divisible by the numbers 1 to 5. * It is the smallest number with exactly 12 divisors. * It is one of seven integers that have more divisors than any number less than twice itself , one of six that are also lowest common multiple of a consecutive set of integers from 1, and one of six that are divisors of every highly composite number higher than itself. * It is the smallest number that is the sum of two odd primes in six ways.Wells, D. ''The Penguin D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Base 60
Sexagesimal, also known as base 60 or sexagenary, is a numeral system with sixty as its base. It originated with the ancient Sumerians in the 3rd millennium BC, was passed down to the ancient Babylonians, and is still used—in a modified form—for measuring time, angles, and geographic coordinates. The number 60, a superior highly composite number, has twelve factors, namely 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60, of which 2, 3, and 5 are prime numbers. With so many factors, many fractions involving sexagesimal numbers are simplified. For example, one hour can be divided evenly into sections of 30 minutes, 20 minutes, 15 minutes, 12 minutes, 10 minutes, 6 minutes, 5 minutes, 4 minutes, 3 minutes, 2 minutes, and 1 minute. 60 is the smallest number that is divisible by every number from 1 to 6; that is, it is the lowest common multiple of 1, 2, 3, 4, 5, and 6. ''In this article, all sexagesimal digits are represented as decimal numbers, except where otherwise noted. Fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AD 60
__NOTOC__ AD 60 ( LX) was a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Nero and Lentulus (or, less frequently, year 813 ''Ab urbe condita''). The denomination AD 60 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. The year 60 is the first identifiable year for which a date is cited complete with day of the week, i.e. 6 February 60, identified as a "Sunday" (as ''viii idus Februarius dies solis'' "eighth day before the ides of February, day of the Sun") in a Pompeiian graffito. According to the currently-used Julian calendar, 6 February 60 was a Wednesday (''dies Mercurii'', "day of Mercury"). This is explained by the existence of two conventions of naming days of the weeks based on the planetary hours system, 6 February was a "Sunday" based on the sunset naming convention ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neodymium
Neodymium is a chemical element with the symbol Nd and atomic number 60. It is the fourth member of the lanthanide series and is considered to be one of the rare-earth metals. It is a hard, slightly malleable, silvery metal that quickly tarnishes in air and moisture. When oxidized, neodymium reacts quickly producing pink, purple/blue and yellow compounds in the +2, +3 and +4 oxidation states. It is generally regarded as having one of the most complex spectra of the elements. Neodymium was discovered in 1885 by the Austrian chemist Carl Auer von Welsbach, who also discovered praseodymium. It is present in significant quantities in the minerals monazite and bastnäsite. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. Neodymium is fairly common—about as common as cobalt, nickel, or copper—and is widely distributed in the Earth's crust. Most of the world's commercial neodymium is mined in China, as is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2060
In contemporary history, the third millennium of the anno Domini or Common Era in the Gregorian calendar is the current millennium spanning the years 2001 to 3000 ( 21st to 30th centuries). Ongoing futures studies seek to understand what is likely to continue and what could plausibly change in the course of this period and beyond. Predictions and forecasts not included on this timeline * List of future astronomical events ** List of lunar eclipses in the 21st century ** List of solar eclipses in the 21st century * Projections of population growth * Climate change ** Representative Concentration Pathway ** Shared Socioeconomic Pathways * Extinction * List of dates predicted for apocalyptic events * Predictions and claims for the Second Coming * Near future in fiction * Works falling into the public domain in the United States 21st century 2000s * See: 2001 * 2002 * 2003 * 2004 * 2005 * 2006 * 2007 * 2008 * 2009 2010s * See: 2010 * 2011 * 2012 * 2013 * 2014 * 2015 * 201 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
60 BC
__NOTOC__ Year 60 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Metellus Celer and Afranius (or, less frequently, year 694 ''Ab urbe condita''). The denomination 60 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Republic * Gaius Julius Caesar suppresses an uprising and conquers all of Lusitania for Rome. * Creation of the First Triumvirate, an informal political alliance between Julius Caesar, Pompey the Great and Marcus Licinius Crassus (or 59 BC). Syria * The Seleucid Empire comes to an end with the last two emperors being murdered on orders from Rome. China * The Han Dynasty government establishes the Protectorate of the Western Regions, the highest military position of a military commander on the Western frontier (Tarim Basin). Births * Curia, wife of Quintus Lucretius ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Less-than Sign
The less-than sign is a mathematical symbol that denotes an inequality between two values. The widely adopted form of two equal-length strokes connecting in an acute angle at the left, , has been found in documents dated as far back as the 1560s. In mathematical writing, the less-than sign is typically placed between two values being compared and signifies that the first number is less than the second number. Examples of typical usage include '' < 1'' and ''−2 < 0''. Since the development of computer , the less-than sign and the have been repurposed for a range of uses and operations. Computing The less-than sign, , is an original |
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