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Carl Georg Barth
Carl Georg Lange Barth (February 28, 1860 – October 28, 1939) was a Norwegian-American mathematician, mechanical and consulting engineer, and lecturer at Harvard University. Barth is known as one of the foreman of scientific management, who improved and popularized the industrial use of compound slide rules. Biography Youth and education Carl Georg Barth was born in Christiania, Norway (now Oslo). He was the fourth child of Jakob Boeckman Barth (1822-1892), a lawyer and Adelaide Magdeline Lange Barth (1828- 1897), daughter of a Danish clergyman. He received his early education in the public schools at Lillehammer. He was a graduate from University at Christiania. He later attended the Royal Norwegian Navy technical school at Horten. In 1877, Barth started an apprenticeship in the navy yard at Karljohansvern in Horten. Career In 1899, efficiency expert Frederick W. Taylor hired Barth to work with him at Bethlehem Steel Company. Carl Barth helped to develop speed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl G
The Carl Gustaf 8.4 cm recoilless rifle (, named after ''Carl Gustafs Stads Gevärsfaktori'' which initially produced it) is a Swedish developed caliber Man-portable anti-tank systems, man-portable Shoulder-fired missile, shoulder-fired recoilless rifle, initially developed by the Royal Swedish Army Materiel Administration during the second half of the 1940s as a close-range anti-tank and Infantry support gun, support weapon for infantry, which has seen great export success around the globe and is today a popular multi-purpose support weapon in use by many nations. The Carl Gustaf 84 mm recoilless rifle is a lightweight, low-cost weapon that uses a wide range of ammunition, which makes it extremely flexible and suitable for a wide variety of roles. Development of the initial model started from 1946 as one of the many recoilless rifle designs of that era, based on the experience from the earlier Carl Gustaf 20 mm recoilless rifle and the success of man-portable rocket laun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Speeds And Feeds
The phrase speeds and feeds or feeds and speeds refers to two separate velocities in machine tool practice, cutting speed and feed rate. They are often considered as a pair because of their combined effect on the cutting process. Each, however, can also be considered and analyzed in its own right. ''Cutting speed'' (also called ''surface speed'' or simply ''speed'') is the speed difference (relative velocity) between the cutting tool and the surface of the workpiece it is operating on. It is expressed in units of distance across the workpiece surface per unit of time, typically surface feet per minute (sfm) or meters per minute (m/min). ''Feed rate'' (also often styled as a solid compound, ''feedrate'', or called simply ''feed'') is the relative velocity at which the cutter is advanced along the workpiece; its vector is perpendicular to the vector of cutting speed. Feed rate units depend on the motion of the tool and workpiece; when the workpiece rotates (''e.g.'', in turning an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1939 Deaths
This year also marks the start of the Second World War, the largest and deadliest conflict in human history. Events Below, the events of World War II have the "WWII" prefix. January * January 1 ** Third Reich *** Jews are forbidden to work with Germans. *** The Youth Protection Act was passed on April 30, 1938 and the Working Hours Regulations came into effect. *** The Jews name change decree has gone into effect. ** The rest of the world *** In Spain, it becomes a duty of all young women under 25 to complete compulsory work service for one year. *** First edition of the Vienna New Year's Concert. *** The company of technology and manufacturing scientific instruments Hewlett-Packard, was founded in a garage in Palo Alto, California, by William (Bill) Hewlett and David Packard. This garage is now considered the birthplace of Silicon Valley. *** Sydney, in Australia, records temperature of 45 ˚C, the highest record for the city. *** Philipp Etter took over as Swi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1860 Births
Year 186 ( CLXXXVI) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Aurelius and Glabrio (or, less frequently, year 939 ''Ab urbe condita''). The denomination 186 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 Empire * Peasants in Gaul stage an anti-tax uprising under Maternus. * Roman governor Pertinax escapes an assassination attempt, by British usurpers. New Zealand * The Hatepe volcanic eruption extends Lake Taupō and makes skies red across the world. However, recent radiocarbon dating by R. Sparks has put the date at 233 AD ± 13 (95% confidence). Births * Ma Liang, Chinese official of the Shu Han state (d. 222) Deaths * April 21 – Apollonius the Apologist, Christian martyr * Bian Zhang, Chinese official and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anticapitalist
Anti-capitalism is a political ideology and movement encompassing a variety of attitudes and ideas that oppose capitalism. In this sense, anti-capitalists are those who wish to replace capitalism with another type of economic system, such as socialism or communism. Socialism Socialism advocates public or direct worker ownership and administration of the means of production and allocation of resources, and a society characterized by equal access to resources for all individuals, with an egalitarian method of compensation.''Newman, Michael''. (2005) ''Socialism: A Very Short Introduction'', Oxford University Press, # A theory or policy of social organisation which aims at or advocates the ownership and democratic control of the means of production, by workers or the community as a whole, and their administration or distribution in the interests of all. # Socialists argue for a worker cooperative/community economy, or the commanding heights of the economy, with democratic co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leftist
Left-wing politics describes the range of political ideologies that support and seek to achieve social equality and egalitarianism, often in opposition to social hierarchy. Left-wing politics typically involve a concern for those in society whom its adherents perceive as disadvantaged relative to others as well as a belief that there are unjustified inequalities that need to be reduced or abolished. Left-wing politics are also associated with popular or state control of major political and economic institutions. According to emeritus professor of economics Barry Clark, left-wing supporters "claim that human development flourishes when individuals engage in cooperative, mutually respectful relations that can thrive only when excessive differences in status, power, and wealth are eliminated." Within the left–right political spectrum, ''Left'' and ''Right'' were coined during the French Revolution, referring to the seating arrangement in the French Estates General. Those ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watertown, Massachusetts
Watertown is a city in Middlesex County, Massachusetts, and is part of Greater Boston. The population was 35,329 in the 2020 census. Its neighborhoods include Bemis, Coolidge Square, East Watertown, Watertown Square, and the West End. Watertown was one of the first Massachusetts Bay Colony settlements organized by Puritans, Puritan settlers in 1630. The city is home to the Perkins School for the Blind, the Armenian Library and Museum of America, and the historic Watertown Arsenal, which produced military armaments from 1816 through World War II. History Archeological evidence suggests that Watertown was inhabited for thousands of years before European colonization of the Americas, colonization. In the 1600s, two groups of Massachusett, the Pequossette and the Nonantum, had settlements on the banks of the river later called the Charles, and a contemporary source lists "Pigsgusset" as the native name of "Water towne." The Pequossette built a fishing weir to trap herring at the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watertown Arsenal
The Watertown Arsenal was a major American arsenal located on the northern shore of the Charles River in Watertown, Massachusetts. The site is now registered on the ASCE's List of Historic Civil Engineering Landmarks and on the US National Register of Historic Places, and it is home to a park, restaurants, mixed use office space, and currently serves as the national headquarters for athenahealth. History The arsenal was established in 1816, on of land, by the United States Army for the receipt, storage, and issuance of ordnance. In this role, it replaced the earlier Charlestown Arsenal. The arsenal's earliest plan incorporated 12 buildings aligned along a north–south axis overlooking the river. Alexander Parris, later designer of Quincy Market, was architect. Buildings included a military store and arsenal, as well as shops and housing for officers and men. All were made of brick with slate roofs in the Federal style, and a high wall enclosed the compound. By 1819 all bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scranton, Pennsylvania
Scranton is a city in the Commonwealth (U.S. state), Commonwealth of Pennsylvania, United States, and the county seat of Lackawanna County, Pennsylvania, Lackawanna County. With a population of 76,328 as of the 2020 United States census, 2020 U.S. census, Scranton is the largest city in Northeastern Pennsylvania, the Wyoming Valley, and the Scranton–Wilkes-Barre–Hazleton Metropolitan Statistical Area, which has a population of 562,037 as of 2020. It is List of cities and boroughs in Pennsylvania by population, the sixth largest city in Pennsylvania. The contiguous network of five cities and more than 40 boroughs all built in a straight line in Northeastern Pennsylvania's urban area act culturally and logistically as one continuous city, so while the city of Scranton itself is a smaller town, the larger unofficial city of Scranton/Wilkes-Barre contains nearly half a million residents in roughly 200 square miles. Scranton/Wilkes-Barre is the cultural and economic center of a re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Society Of Mechanical Engineers
The American Society of Mechanical Engineers (ASME) is an American professional association that, in its own words, "promotes the art, science, and practice of multidisciplinary engineering and allied sciences around the globe" via "continuing education, training and professional development, codes and standards, research, conferences and publications, government relations, and other forms of outreach." ASME is thus an engineering society, a standards organization, a research and development organization, an advocacy organization, a provider of training and education, and a nonprofit organization. Founded as an engineering society focused on mechanical engineering in North America, ASME is today multidisciplinary and global. ASME has over 85,000 members in more than 135 countries worldwide. ASME was founded in 1880 by Alexander Lyman Holley, Henry Rossiter Worthington, John Edison Sweet and Matthias N. Forney in response to numerous steam boiler pressure vessel failures. Kno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philadelphia
Philadelphia, often called Philly, is the largest city in the Commonwealth of Pennsylvania, the sixth-largest city in the U.S., the second-largest city in both the Northeast megalopolis and Mid-Atlantic regions after New York City. Since 1854, the city has been coextensive with Philadelphia County, the most populous county in Pennsylvania and the urban core of the Delaware Valley, the nation's seventh-largest and one of world's largest metropolitan regions, with 6.245 million residents . The city's population at the 2020 census was 1,603,797, and over 56 million people live within of Philadelphia. Philadelphia was founded in 1682 by William Penn, an English Quaker. The city served as capital of the Pennsylvania Colony during the British colonial era and went on to play a historic and vital role as the central meeting place for the nation's founding fathers whose plans and actions in Philadelphia ultimately inspired the American Revolution and the nation's inde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machine Tool
A machine tool is a machine for handling or machining metal or other rigid materials, usually by cutting, boring, grinding, shearing, or other forms of deformations. Machine tools employ some sort of tool that does the cutting or shaping. All machine tools have some means of constraining the work piece and provide a guided movement of the parts of the machine. Thus, the relative movement between the workpiece and the cutting tool (which is called the toolpath) is controlled or constrained by the machine to at least some extent, rather than being entirely "offhand" or " freehand". It is a power-driven metal cutting machine which assists in managing the needed relative motion between cutting tool and the job that changes the size and shape of the job material. The precise definition of the term ''machine tool'' varies among users, as discussed below. While all machine tools are "machines that help people to make things", not all factory machines are machine tools. Today machine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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