HISTORY OF COMPUTERS Historical records will tell us that man has invented three types of devices to assist him in calculating and processing data. These devices could be classified into: a) Manual-mechanical b) Electromechanical c) Electronic 2000 BC - MECHANICAL COMPUTER THE ABACUS * Computations are done by sliding beads on a wire arranged on a tray. Came from the Greek word abax meaning flat surface John Napier(1617) – Logs and Bones * a Scotsman‚ invented
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------------------------------------------------- History of computing hardware ) Computing hardware is a platform for information processing. History of computing | Hardware | * Hardware before 1960 * Hardware 1960s to present * Hardware in Soviet Bloc countries | Computer science | * Artificial intelligence * Compiler construction * Computer science * Operating systems * Programming languages * Software engineering | Modern concepts | * Graphical user
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History and Development of Statistics Simple forms of statistics have been used since the beginning of civilization‚ when pictorial representations or other symbols were used to record numbers of people‚ animals‚ and inanimate objects on skins‚ slabs‚ or sticks of wood and the walls of caves. Before 3000 BC theBabylonians used small clay tablets to record tabulations of agricultural yields and of commodities bartered or sold. The Egyptians analyzed the population and material wealth of their country
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Chapter 10 : Quadratic Relations and Conic Sections History of Conic Sections History of Conic Sections Apollonius of Perga (about 262-200 B.C.) was the last of the great mathematicians of the golden age of Greek mathematics. Apollonius‚ known as "the great geometer‚" arrived at the properties of the conic sections purely by geometry. His descriptions were so complete that he would have had little to learn about conic sections from our modern analytical geometry except for the improved modern
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Reverse Engineering of Steering System with Developed Equation for Steer Angle Abstract — This paper deals with the steering mechanism in detail. As the design component‚ various equations were derived from the fundamentals. A computer program was made on C language‚ which calculates all the data relating to steering i.e. (Ackermann angle‚ length of tie rod‚ steer angle). The program was simulated under different Ackermann angle‚ and various inferences were drawn from it. CAD models were
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History of Pi There are many people who have discovered and proved what pi is. As time goes on people discover more and more of the seemingly random numbers. Four of the people who proved pi are the Liu Hui‚ Archimedes of Syracuse‚ James Gregory‚ and the Bible. The first proof I will be talking about is Liu Hui’s. Liu Hui was a Chinese mathematician whose method for proving pi was to find the area of a polygon inscribed in a circle. When the number of sides on the inscribed polygon increased
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neutrons and protons‚ and electrons moving extremely fast around the nucleus‚ forming an electron cloud instead of moving in orbits like what Bohr’s model suggests - proposed by Erwin Schrodinger in 1926‚ when he derived this model using a mathematical equation that he himself made http://1.bp.blogspot.com/-LEqGPr4h8R4/TsgJyT6vP6I/AAAAAAAAAKE/pTl6O3V2u0M/s200/electron_cloud_model.jpg The Planetary/Bohr’s Model - an atom is comprised of a nucleus made up of neutrons with a neutral charge and protons with
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Brief History of Computers (A Look Back at Computing) Computers have become one of the most important parts of modern society. Nearly everything that is modern required or uses computer related technology in some way. But how did computers as we know them come to exist? Did someone sitting in his lab just one day say‚ "Aha! I’ve got it! The computer?! Well‚ no‚ that is not how this happened. Rather‚ many years of brilliant ideas and research from many different individuals contributed
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BTL-1 Inventor : George Stibitz Builder: Bell Labs Operational: 1939 Retired: 1949 Cost :20‚000$ Size : 8’ x 5’ x1’ Technology: Relays‚ Teletype Memory: 2 Complex Numbers Program: Fixed‚ complex arithmetic calculator Speed: 02 operations per second Z3 Inventor: Konrad Zuse Builder : Konrad Zuse Operational : 1941 Retired: 1944(Destroyed) Cost: $6500 Size: Two 6’ x 3’ x1’ Memory racks Technology: Relays Memory : 64 22-bit floating point words Program: 35mm punched film Speed
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HISTORY OF COMPUTER Abacus - The First man-made computing device. - It can perform addition and subtraction - invented in China Pascal’s calculating machine/Pascaline - The first mechanical calculator - Invented by Blaise Pascal - Can perform addition & subtraction Leibnitz calculator - First general-purpose calculating machine - Extended version of Pascal Calculating machine - Can perform multiplication and Division - Invented by Gottfried Leibnitz Automatic
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