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Mabel MacFerran Rockwell
Mabel MacFerran Rockwell (1902–May 27, 1979) was an electrical engineer and the only woman involved in designing and installing the power generating machinery for Hoover Dam 1. She became an associate member of the American Institute of Electrical Engineers (AIEE) in 1928, one of the first ten women to join the professional association. MacFerran worked for Southern California Edison, the Metropolitan Water District of Southern California in Los Angeles, the United States Bureau of Reclamation, and the Lockheed Corporation. Personal life and education Mabel MacFerran was born in Philadelphia, PA, in 1902 to Edgar O. and Mabel Alexander MacFerran. Her father was a scientist and her mother an astronomer and mathematician. She was raised in the Quaker tradition. She attended the Germantown Friends School in Germantown, Pennsylvania. While studying at Bryn Mawr College, she had a summer job with the Leeds and Northrup Company, which introduced her to engineering. She transferre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philadelphia, Pennsylvania
Philadelphia ( ), colloquially referred to as Philly, is the List of municipalities in Pennsylvania, most populous city in the U.S. state of Pennsylvania and the List of United States cities by population, sixth-most populous city in the United States, with a population of 1,603,797 in the 2020 United States census, 2020 census. The city is the urban core of the Philadelphia metropolitan area (sometimes called the Delaware Valley), the nation's Metropolitan statistical area, seventh-largest metropolitan area and ninth-largest combined statistical area with 6.245 million residents and 7.379 million residents, respectively. Philadelphia was founded in 1682 by William Penn, an English Americans, English Quakers, Quaker and advocate of Freedom of religion, religious freedom, and served as the capital of the Colonial history of the United States, colonial era Province of Pennsylvania. It then played a historic and vital role during the American Revolution and American Revolutionary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stanford Memorial Church
Stanford Memorial Church (also referred to informally as MemChu) is located on the Main Quad at the center of the Stanford University campus in Stanford, California, United States. It was built during the American RenaissanceGregg, p. 34 by Jane Stanford as a memorial to her husband Leland. Designed by architect Charles A. Coolidge, a student of Henry Hobson Richardson, the church has been called "the University's architectural crown jewel". Designs for the church were submitted to Jane Stanford and the university trustees in 1898, and it was dedicated in 1903. The building is Romanesque in form and Byzantine in its details, inspired by churches in the region of Venice, especially, Ravenna. Its stained glass windows and extensive mosaics are based on religious paintings the Stanfords admired in Europe. The church has five pipe organs, which allow musicians to produce many styles of organ music. Stanford Memorial Church has withstood two major earthquakes, in 1906 and 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Engineers
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, electromagnetics and waves, microwave engineering, nanotechnology, electrochemistry, renewable energies, mechatronics/contr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigma Xi
Sigma Xi, The Scientific Research Honor Society () is an international non-profit honor society for scientists and engineers. Sigma Xi was founded at Cornell University by a faculty member and graduate students in 1886 and is one of the oldest honor societies. Membership in Sigma Xi is by invitation only, where members nominate others on the basis of their research achievements or potential. The society was a founding member of the Association of College Honor Societies in 1925, but withdrew in 1933 and much later was a founder of to form the Honor Society Caucus. History Sigma Xi was founded in November 1886 at the Sibling College of Mechanical Engineering at Cornell University in Ithaca, New York.Shepardson, Francis Wayland, ed. Baird's Manual of American College Fraternities, 12th edition'. Menasha, Wisconsin: The Collegiate Press/George Banta Publishing Company, 1930. pp. 369-371. ''via'' Hathi Trust. Its founders were Henry Shaler Williams, a Cornell faculty member, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Society Of Women Engineers
The Society of Women Engineers (SWE) is an international not-for-profit educational and service organization. Founded in 1950 and headquartered in the United States, the Society of Women Engineers is a major advocate for women in engineering and technology. SWE has over 47,000 members in nearly 100 professional sections, 300 collegiate sections, and 60 global affiliate groups throughout the world. Antecedents The SWE archives contain a series of letters from the Elsie Eaves Papers (bequeathed to the Society), which document the origins of the Society in the early 20th century. In 1919, a group of women at the University of Colorado helped establish a small community of women with an engineering or science background, called the American Society of Women Engineers and Architects. While this organization was only recognized within the campus community, it set the foundation for the development of the international Society of Women Engineers. This group included Lou Alta Melton, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dwight D
Dwight may refer to: People and fictional characters * Dwight (given name), including a list of people and fictional characters * Dwight (surname), a list of people Places Canada * Dwight, Ontario, village in the township of Lake of Bays, Ontario United States * Dwight (neighborhood), part of an historic district in New Haven, Connecticut * Dwight, Illinois, a village * Dwight, Kansas, a city * Dwight, Massachusetts, a village * Dwight, Michigan, an unincorporated community * Dwight, Nebraska, a village * Dwight, North Dakota, a city * Dwight Township, Livingston County, Illinois * Dwight Township, Michigan Other uses * Dwight Airport, a public-use airport north of Dwight, Illinois * Dwight Correctional Center, a maximum security prison for adult females in Illinois * Dwight School, New York City {{disambig, geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UGM-27 Polaris
The UGM-27 Polaris missile was a two-stage solid-fueled nuclear-armed submarine-launched ballistic missile (SLBM). As the United States Navy's first SLBM, it served from 1961 to 1980. In the mid-1950s the Navy was involved in the Jupiter missile project with the U.S. Army, and had influenced the design by making it squat so it would fit in submarines. However, they had concerns about the use of liquid fuel rockets on board ships, and some consideration was given to a solid fuel version, Jupiter S. In 1956, during an anti-submarine study known as Project Nobska, Edward Teller suggested that very small hydrogen bomb warheads were possible. A crash program to develop a missile suitable for carrying such warheads began as Polaris, launching its first shot less than four years later, in February 1960. As the Polaris missile was fired underwater from a moving platform, it was essentially invulnerable to counterattack. This led the Navy to suggest, starting around 1959, that they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Westinghouse Electric Corporation
The Westinghouse Electric Corporation was an American manufacturing company founded in 1886 by George Westinghouse and headquartered in Pittsburgh, Pennsylvania. It was originally named "Westinghouse Electric & Manufacturing Company" and was renamed "Westinghouse Electric Corporation" in 1945. Through the early and mid-20th century, Westinghouse Electric was a powerhouse in heavy industry, electrical production and distribution, consumer electronics, home appliances and a wide variety of other products. They were a major supplier of generators and steam turbines for most of their history, and was also a major player in the field of nuclear power, starting with the Westinghouse Atom Smasher in 1937. A series of downturns and management missteps in the 1970s and 80s combined with large cash balances led the company to enter the financial services business. Their focus was on mortgages, which suffered significant losses in the late 1980s. In 1992 they announced a major restruct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fresno, California
Fresno (; ) is a city in the San Joaquin Valley of California, United States. It is the county seat of Fresno County, California, Fresno County and the largest city in the greater Central Valley (California), Central Valley region. It covers about and had a population of 542,107 as of the 2020 United States census, 2020 census, making it the List of largest California cities by population, fifth-most populous city in California, the most populous inland city in California, and the List of United States cities by population, 34th-most populous city in the nation. Named for the abundant ash trees lining the San Joaquin River, Fresno was founded in 1872 as a railway station of the Central Pacific Railroad before it was Municipal corporation, incorporated in 1885. It has since become an economic hub of Fresno County and the San Joaquin Valley, with much of the surrounding areas in the Metropolitan Fresno region predominantly tied to large-scale agricultural production. Fresno is n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sacramento, California
Sacramento ( or ; ; ) is the List of capitals in the United States, capital city of the U.S. state of California and the county seat, seat of Sacramento County, California, Sacramento County. Located at the confluence of the Sacramento River, Sacramento and American Rivers in Northern California's Sacramento Valley, Sacramento's 2020 population of 524,943 makes it the fourth-most populous city in Northern California, List of largest California cities by population, the sixth-most populous in the state, the List of United States cities by population, ninth-most populous state capital, and the List of United States cities by population, 35th most populous city in the United States. Sacramento is the seat of the California Legislature and the governor of California. Sacramento is also the cultural and economic core of the Sacramento metropolitan area, Greater Sacramento area, which at the 2020 United States census, 2020 census had a population of 2,680,831, the fourth-largest S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Federal Civil Service
The United States federal civil service is the civilian workforce (i.e., non-elected and non-military public sector employees) of the United States federal government's departments and agencies. The federal civil service was established in 1871 (). U.S. state and local government entities often have comparable civil service systems that are modeled on the national system to varying degrees. The U.S. civil service is managed by the Office of Personnel Management, which in December 2011 reported approximately 2.79 million civil servants employed by the federal government. This included employees in the departments and agencies run by any of the three branches of government (the executive branch, legislative branch, and judicial branch) and the over 600,000 employees of the U.S. Postal Service. Types of employees There are three categories of U.S. federal employees: * The ''competitive service'' includes the majority of civil service positions, meaning employees are selected base ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spot Welding
Spot welding (or resistance spot welding) is a type of electric resistance welding used to weld various sheet metal products, through a process in which contacting metal surface points are joined by the heat obtained from resistance to electric current. The process uses two shaped copper alloy electrodes to concentrate welding current into a small "spot" and to simultaneously clamp the sheets together. Work-pieces are held together under pressure exerted by electrodes. Typically the sheets are in the thickness range. Forcing a large current through the spot will melt the metal and form the weld. The attractive feature of spot welding is that a large amount of energy can be delivered to the spot in a very short time (approximately 10–100 milliseconds). This permits the welding to occur without excessive heating of the remainder of the sheet. The amount of heat (energy) delivered to the spot is determined by the resistance between the electrodes and the magnitude and duration ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
