|
1956 In Science
The year 1956 in science and technology involved some significant events, listed below. Biology * March – Denham Harman proposes the free-radical theory of aging. * Wesley K. Whitten reports developing eight-cell mouse ovum, ova to blastocyst stage ''in vitro''. Chemistry * July 14 – Second part of the publication of Dorothy Hodgkin's description of the structure of Vitamin B12, Vitamin B12. Climatology * May – Gilbert Plass publishes his seminal article "The Carbon Dioxide Theory of Climate Change". Computer science * July 13 – John McCarthy (computer scientist), John McCarthy (Dartmouth), Marvin Minsky (MIT), Claude Shannon (Bell Labs) and Nathaniel Rochester (computer scientist), Nathaniel Rochester (IBM) assemble the first coordinated research meeting on the topic of artificial intelligence, at Dartmouth College, Hanover, New Hampshire, in the United States. * September 13 – The hard disk drive is invented by an IBM team led by Reynold B. Johnson. * TX-0 transis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nathaniel Rochester (computer Scientist)
Nathaniel Rochester (January 14, 1919 – June 8, 2001) was the chief architect of the IBM 701, the first mass produced scientific computer, and of the prototype of its first commercial version, the IBM 702. He wrote the first assembler and participated in the founding of the field of artificial intelligence. Early work Rochester received his B.S. degree in electrical engineering from the Massachusetts Institute of Technology in 1941. He stayed on at MIT in the Radiation Laboratory for three years and then moved to Sylvania Electric Products where he was responsible for the design and construction of radar sets and other military equipment. His group built the arithmetic element for the Whirlwind I computer at MIT. IBM 701 computer In 1948, Rochester moved to IBM, where he co-designed, along with Jerrier Haddad, the first mass-produced scientific computer, the IBM 701. He wrote the first symbolic assembler, which allowed programs to be written in short, readable co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martin Gardner
Martin Gardner (October 21, 1914May 22, 2010) was an American popular mathematics and popular science writer with interests also encompassing magic, scientific skepticism, micromagic, philosophy, religion, and literatureespecially the writings of Lewis Carroll, L. Frank Baum, and G. K. Chesterton.Martin (2010) He was a leading authority on Lewis Carroll; '' The Annotated Alice'', which incorporated the text of Carroll's two Alice books, was his most successful work and sold over a million copies.Martin Gardner obituary (2010) He had a lifelong interest in magic and illusion and in 1999, ''MAGIC'' magazine named him as one of the "10 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proceedings Of The American Mathematical Society
''Proceedings of the American Mathematical Society'' is a monthly peer-reviewed scientific journal of mathematics published by the American Mathematical Society. The journal is devoted to shorter research articles. As a requirement, all articles must be at most 15 printed pages. According to the ''Journal Citation Reports'', the journal has a 2018 impact factor of 0.813. Scope ''Proceedings of the American Mathematical Society'' publishes articles from all areas of pure and applied mathematics, including topology, geometry, analysis, algebra, number theory, combinatorics, logic, probability and statistics. Abstracting and indexing This journal is indexed in the following databases: 2011. American Mathematical Society. * [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kruskal's Algorithm
Kruskal's algorithm finds a minimum spanning forest of an undirected edge-weighted graph. If the graph is connected, it finds a minimum spanning tree. It is a greedy algorithm that in each step adds to the forest the lowest-weight edge that will not form a cycle. The key steps of the algorithm are sorting and the use of a disjoint-set data structure to detect cycles. Its running time is dominated by the time to sort all of the graph edges by their weight. A minimum spanning tree of a connected weighted graph is a connected subgraph, without cycles, for which the sum of the weights of all the edges in the subgraph is minimal. For a disconnected graph, a minimum spanning forest is composed of a minimum spanning tree for each connected component. This algorithm was first published by Joseph Kruskal in 1956, and was rediscovered soon afterward by . Other algorithms for this problem include Prim's algorithm, Borůvka's algorithm, and the reverse-delete algorithm. Algorithm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joseph Kruskal
Joseph Bernard Kruskal, Jr. (; January 29, 1928 – September 19, 2010) was an American mathematician, statistician, computer scientist and psychometrician. Personal life Kruskal was born to a Jewish family in New York City to a successful fur wholesaler, Joseph B. Kruskal, Sr. His mother, Lillian Rose Vorhaus Kruskal Oppenheimer, became a noted promoter of origami during the early era of television. Kruskal had two notable brothers, Martin David Kruskal, co-inventor of solitons, and William Kruskal, who developed the Kruskal–Wallis one-way analysis of variance. One of Joseph Kruskal's nephews is notable computer scientist and professor Clyde Kruskal. Education and career He was a student at the University of Chicago earning a bachelor of science in mathematics in 1948, and a master of science in mathematics in the following year. After his time at the University of Chicago Kruskal attended Princeton University, where he completed his Ph.D. in 1954, nominally under ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Computer Museum, Boston
The Computer Museum was a Boston, Massachusetts, museum that opened in 1979 and operated in three locations until 1999. It was once referred to as TCM and is sometimes called the Boston Computer Museum. When the museum closed and its space became part of Boston Children's Museum next door in 2000, much of its collection was sent to the Computer History Museum in California. History The Digital Computer History Museum The Digital Equipment Corporation (DEC) Museum Project began in 1975 with a display of circuit and memory hardware in a converted lobby closet of DEC's Main (Mill) Building 12 in Maynard, Massachusetts. In September 1979, with the assistance of Digital Equipment Corporation, Gordon Bell, Gordon and Gwen Bell founded the Digital Computer Museum in a former RCA building in Marlboro, Massachusetts. Though entirely funded by DEC and housed within a corporate facility, from its inception the museum's activities were altruistic, with an industry-wide, international preservat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MIT Lincoln Laboratory
The MIT Lincoln Laboratory, located in Lexington, Massachusetts, is a United States Department of Defense federally funded research and development center chartered to apply advanced technology to problems of national security. Research and development activities focus on long-term technology development as well as rapid system prototyping and demonstration. Its core competencies are in sensors, integrated sensing, signal processing for information extraction, decision-making support, and communications. These efforts are aligned within ten mission areas. The laboratory also maintains several field sites around the world. The laboratory transfers much of its advanced technology to government agencies, industry, and academia, and has launched more than 100 start-ups. History Origins At the urging of the United States Air Force, the Lincoln Laboratory was created in 1951 at the Massachusetts Institute of Technology (MIT) as part of an effort to improve the U.S. air defense syste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transistor
A transistor is a semiconductor device used to Electronic amplifier, amplify or electronic switch, switch electrical signals and electric power, power. It is one of the basic building blocks of modern electronics. It is composed of semiconductor material, usually with at least three terminal (electronics), terminals for connection to an electronic circuit. A voltage or Electric current, current applied to one pair of the transistor's terminals controls the current through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal. Some transistors are packaged individually, but many more in miniature form are found embedded in integrated circuits. Because transistors are the key active components in practically all modern electronics, many people consider them one of the 20th century's greatest inventions. Physicist Julius Edgar Lilienfeld proposed the concept of a field-effect transisto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TX-0
The TX-0, for ''Transistorized Experimental computer zero'', but affectionately referred to as tixo (pronounced "tix oh"), was an early fully transistorized computer and contained a then-huge 64Kilo-, K of 18-bit words of magnetic-core memory. Construction of the TX-0 began in 1955 and ended in 1956. It was used continually through the 1960s at Massachusetts Institute of Technology, MIT. The TX-0 incorporated around 3,600 Philco high-frequency surface-barrier transistors, the first transistor suitable for high-speed computers. The TX-0 and its direct descendant, the original PDP-1, were platforms for pioneering computer research and the development of what would later be called computer "hacker" culture. For MIT, this was the first computer to provide a system console which allowed for direct interaction, as opposed to previous computers, which required the use of punched card as a primary interface for programmers debugging their programs. Members of MIT's Tech Model Railroad Cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reynold B
Reynold is an English masculine given name that comes from an Old High German personal name made up of the element "ragin" (''advice, decision'') and "wald" (''power, authority, brightness''). It is a cognate of ''Rögnvaldr'', which is also a source of the name Ronald. The Normans brought the name to England. Related names include: "Reginald" (English), "Reginaldo" (Italian Italian(s) may refer to: * Anything of, from, or related to the people of Italy over the centuries ** Italians, a Romance ethnic group related to or simply a citizen of the Italian Republic or Italian Kingdom ** Italian language, a Romance languag ...), "Rinaldo" (Italian), "Reinaldo" ( Portuguese, Spanish), "Reinhold" ( German), "Reino" ( Finnish), "Reynol" (German, Spanish), " Reinout" ( Dutch), "Renaud" ( French), "Reynaldo" (Spanish), and "Reynaud" (French). Reynold is a much less common surname than its derivative Reynolds; people with the surname "Reynold" include: Surname * Hannah Reynold, Swedish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hard Disk Drive
A hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating hard disk drive platter, platters coated with magnetic material. The platters are paired with disk read-and-write head, magnetic heads, usually arranged on a moving actuator arm, which read and write data to the platter surfaces. Data is accessed in a random-access manner, meaning that individual Block (data storage), blocks of data can be stored and retrieved in any order. HDDs are a type of non-volatile storage, retaining stored data when powered off. Modern HDDs are typically in the form of a small disk enclosure, rectangular box. Hard disk drives were introduced by IBM in 1956, and were the dominant secondary storage device for History of general-purpose CPUs, general-purpose computers beginning in the early 1960s. HDDs maintained this position into the modern er ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
