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Magnetic-core Memory
In computing, magnetic-core memory is a form of random-access memory. It predominated for roughly 20 years between 1955 and 1975, and is often just called core memory, or, informally, core. Core memory uses toroids (rings) of a hard magnetic material (usually a Ferrite (magnet)#Semi-hard ferrites, semi-hard ferrite). Each core stores one bit of information. Two or more wires pass through each core, forming an X-Y array of cores. When an electrical current above a certain threshold is applied to the wires, the core will become magnetized. The core to be assigned a value – or ''written'' – is selected by powering one X and one Y wire to half of the required current, such that only the single core at the intersection is written. Depending on the direction of the currents, the core will pick up a clockwise or counterclockwise magnetic field, storing a 1 or 0. This writing process also causes electricity to be electromagnetic induction, induced into nearby wires. If t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KL CoreMemory
KL, kL, kl, or kl. may refer to: Businesses and organizations * KLM, a Dutch airline (IATA airline designator KL) * Royal Netherlands Army, Koninklijke Landmacht, the Royal Netherlands Army * Women's List, Kvenna Listin ("Women's List"), a political party in Iceland * KL FM, a Malay language radio station Places * Kaiserslautern, Germany (license plate code KL) * Kerala, India (ISO 3166-2:IN sub-code KL) * Kirkland Lake, Ontario, Canada * Kowloon, Hong Kong * Kuala Lumpur, Malaysia Science, technology, and mathematics * KL engine, version of the Mazda K engine * Klepton (kl.), a type of species in zoology * Kiloliter (kL), a unit of volume * Kullback–Leibler divergence in mathematics * KL (gene), a gene which encodes the klotho enzyme in humans Other uses * Jeep Cherokee (KL) * Kalaallisut language (ISO 639 alpha-2 language code "kl") * Kl (digraph), used in the Zulu language to write /kʟ̥ʼ/ or /kxʼ/ * Konzentrationslager, or concentration camp, abbreviated KZ or KL * ''KL ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
External Memory Algorithm
In computing, external memory algorithms or out-of-core algorithms are algorithms that are designed to process data that are too large to fit into a computer's main memory at once. Such algorithms must be optimized to efficiently fetch and access data stored in slow bulk memory (auxiliary memory) such as hard drives or tape drives, or when memory is on a computer network. External memory algorithms are analyzed in the external memory model. Model External memory algorithms are analyzed in an idealized model of computation called the external memory model (or I/O model, or disk access model). The external memory model is an abstract machine similar to the RAM model, RAM machine model, but with a Cache (computing), cache in addition to main memory. The model captures the fact that read and write operations are much faster in a cache (computing), cache than in main memory, and that Reading (computer), reading long contiguous blocks is faster than reading randomly using a disk read-a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physicist
A physicist is a scientist who specializes in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe. Physicists generally are interested in the root or ultimate causes of Phenomenon, phenomena, and usually frame their understanding in mathematical terms. They work across a wide range of Physics#Research fields, research fields, spanning all length scales: from atom, sub-atomic and particle physics, through biological physics, to physical cosmology, cosmological length scales encompassing the universe as a whole. The field generally includes two types of physicists: Experimental physics, experimental physicists who specialize in the observation of natural phenomena and the development and analysis of experiments, and Theoretical physics, theoretical physicists who specialize in mathematical modeling of physical systems to rationalize, explain and predict natural phenomena. Physicists can apply their k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States asserts sovereignty over five Territories of the United States, major island territories and United States Minor Outlying Islands, various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's List of countries and dependencies by area, third-largest land area and List of countries and dependencies by population, third-largest population, exceeding 340 million. Its three Metropolitan statistical areas by population, largest metropolitan areas are New York metropolitan area, New York, Greater Los Angeles, Los Angel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shanghai
Shanghai, Shanghainese: , Standard Chinese pronunciation: is a direct-administered municipality and the most populous urban area in China. The city is located on the Chinese shoreline on the southern estuary of the Yangtze River, with the Huangpu River flowing through it. The population of the city proper is the List of largest cities, second largest in the world after Chongqing, with around 24.87 million inhabitants in 2023, while the urban area is the List of cities in China by population, most populous in China, with 29.87 million residents. As of 2022, the Greater Shanghai metropolitan area was estimated to produce a gross metropolitan product (GDP (nominal), nominal) of nearly 13 trillion Renminbi, RMB ($1.9 trillion). Shanghai is one of the world's major centers for finance, #Economy, business and economics, research, science and technology, manufacturing, transportation, List of tourist attractions in Shanghai, tourism, and Culture of Shanghai, culture. The Port of Sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Relay Logic
Relay logic is a method of implementing combinational logic in electrical control circuits by using several electrical relays wired in a particular configuration. Ladder logic The schematic diagrams for relay logic circuits are often called line diagrams, because the inputs and outputs are essentially drawn in a series of lines. A relay logic circuit is an electrical network consisting of lines, or rungs, in which each line or rung must have continuity to enable the output device. A typical circuit consists of a number of rungs, with each rung controlling an output. This output is controlled by a combination of input or output conditions, such as input switches and control relays. The conditions that represent the inputs are connected in series, parallel, or series-parallel to obtain the logic required to drive the output. The relay logic circuit forms an electrical schematic diagram for the control of input and output devices. Relay logic diagrams represent the physical in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Industrial Robot
An industrial robot is a robot system used for manufacturing. Industrial robots are automated, programmable and capable of movement on three or more axes. Typical applications of robots include robot welding, welding, painting, assembly, Circular economy, disassembly, Automated storage and retrieval system, pick and place for printed circuit boards, packaging and labeling, Palletizer, palletizing, product inspection, and testing; all accomplished with high endurance, speed, and precision. They can assist in material handling. In the year 2023, an estimated 4,281,585 industrial robots were in operation worldwide according to International Federation of Robotics, International Federation of Robotics (IFR). Types and features There are six types of industrial robots. Articulated robots Articulated robots are the most common industrial robots. They look like a Arm, human arm, which is why they are also called robotic arm or Manipulator (device), manipulator arm. Their articu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Devol
George Charles Devol Jr. (February 20, 1912 – August 11, 2011) was an American inventor, best known for creating Unimate, the first industrial robot. The National Inventors Hall of Fame says, "Devol's patent for the first digitally operated programmable robotic arm represents the foundation of the modern robotics industry." Early life George Devol was born in an upper-middle-class family in Louisville, Kentucky, Louisville, Kentucky. He attended Riordan Prep school. United Cinephone Foregoing higher education, Devol went into business in 1932, forming United Cinephone to produce variable area recording directly onto film for the new sound motion pictures ("Sound film, talkies"). However, he later learned that companies like RCA and Western Electric were working in the same area, and discontinued the product. World War II In 1939, Devol applied for a patent for proximity controls for use in laundry press machines, based on a radio frequency field. This control would aut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ENIAC
ENIAC (; Electronic Numerical Integrator and Computer) was the first Computer programming, programmable, Electronics, electronic, general-purpose digital computer, completed in 1945. Other computers had some of these features, but ENIAC was the first to have them all. It was Turing-complete and able to solve "a large class of numerical problems" through reprogramming. ENIAC was designed by John Mauchly and J. Presper Eckert to calculate artillery external ballistics, firing tables for the United States Army's Ballistic Research Laboratory (which later became a part of the United States Army Research Laboratory, Army Research Laboratory). However, its first program was a study of the feasibility of the thermonuclear weapon. ENIAC was completed in 1945 and first put to work for practical purposes on December 10, 1945.* ENIAC was formally dedicated at the University of Pennsylvania on February 15, 1946, having cost $487,000 (), and called a "Giant Brain" by the press. It had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moore School
The Moore School of Electrical Engineering was a school at the University of Pennsylvania. The school was integrated into the University of Pennsylvania School of Engineering and Applied Science. The Moore School came into existence as a result of an endowment from Alfred Fitler Moore on June 4, 1923. It was granted to Penn's School of Electrical Engineering, located in the Towne Building. The first dean of the Moore School was Harold Pender. The Moore School is particularly famed as the birthplace of the computer industry: * It was here that the first general-purpose Turing complete digital electronic computer, the ENIAC, was built between 1943 and 1946. * Preliminary design work on the ENIAC's successor machine the EDVAC resulted in the stored program concept used in all computers today, the logical design having been promulgated in John von Neumann's ''First Draft of a Report on the EDVAC'', a set of notes synthesized from meetings he attended at the Moore School. * The fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jeffrey Chuan Chu
Jeffrey Chuan Chu (朱傳榘) (July 14, 1919 – June 6, 2011), was a pioneer computer engineer. His work was critical in the development of the computing industries in both the United States and China. Chu was born in Tianjin, Republic of China. He received his Bachelor of Science (BS) degree from the University of Minnesota and his Master of Science (MS) degree from the Moore School at the University of Pennsylvania. Notably, Chu was a member of the engineering team that designed the first American electronic computer, the ENIAC. Following his work on the ENIAC, Chu would go on to work as a scientist in a variety of laboratories where he helped develop iterations of early computers based on IAS architecture and vacuum-tube technology. Starting in the 1980s, following a meeting with Chinese leader Deng Xiaoping, Chu became active in efforts to modernize China through forming international academic partnerships and facilitating the exchange of Western business practices to Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Engineering
Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems that use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the latter half of the 19th century after the commercialization of the electric telegraph, the telephone, and electrical power generation, distribution, and use. Electrical engineering is divided into a wide range of different fields, including computer engineering, systems engineering, power engineering, telecommunications, radio-frequency engineering, signal processing, instrumentation, photovoltaic cells, electronics, and optics and photonics. Many of these disciplines overlap with other engineering branches, spanning a huge number of specializations including hardware engineering, power electronics, Electromagnetism, electromagnetics and waves, microwave engineering, nanotechnology, electrochemistry, renewable energies, mechatronics/control ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
