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John Shive
John Northrop Shive (February 22, 1913 – June 1, 1984) was an American physicist and inventor. He made notable contributions in electronic engineering and solid-state physics during the early days of transistor development at Bell Laboratories. In particular, he produced experimental evidence that holes could diffuse through bulk germanium, and not just along the surface as previously thought. This paved the way from Bardeen and Brattain's point-contact transistor to Shockley's more-robust junction transistor. Shive is best known for inventing the phototransistor in 1948 (a device that combines the sensitivity to light of a photodiode and the current gain of a transistor), and for the Shive wave machine in 1959 (an educational apparatus used to illustrate wave motion). Early life and education John N. Shive was born in Baltimore, Maryland, on February 22, 1913, and grew up in New Jersey. Shive graduated from Rutgers University with a BS in physics and chemistry in 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baltimore
Baltimore is the most populous city in the U.S. state of Maryland. With a population of 585,708 at the 2020 census and estimated at 568,271 in 2024, it is the 30th-most populous U.S. city. The Baltimore metropolitan area is the 20th-largest metropolitan area in the country at 2.84 million residents. The city is also part of the Washington–Baltimore combined statistical area, which had a population of 9.97 million in 2020. Baltimore was designated as an independent city by the Constitution of Maryland in 1851. Though not located under the jurisdiction of any county in the state, it forms part of the central Maryland region together with the surrounding county that shares its name. The land that is present-day Baltimore was used as hunting ground by Paleo-Indians. In the early 1600s, the Susquehannock began to hunt there. People from the Province of Maryland established the Port of Baltimore in 1706 to support the tobacco trade with Europe and established the Town ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walter Brattain
Walter Houser Brattain (; February 10, 1902 – October 13, 1987) was an American solid-state physicist who shared the 1956 Nobel Prize in Physics with John Bardeen and William Shockley for their invention of the point-contact transistor. Brattain devoted much of his life to research on surface states. Biography Walter Brattain was born in Amoy (now Xiamen), Fujian, Qing China, to American parents Ross R. Brattain and Ottilie Houser Brattain. His father was of Scottish descent, while his mother's parents were both immigrants from Stuttgart, Germany. Ross R. Brattain was a teacher at the Ting-Wen Institute, a private school for Chinese boys; Ottilie Houser Brattain was a gifted mathematician. Both were graduates of Whitman College. Ottilie and baby Walter returned to the United States in 1903, and Ross followed shortly afterward. The family lived for several years in Spokane, Washington, then settled on a cattle ranch near Tonasket, Washington in 1911. Brattain attended high ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Direct Distance Dialing
Direct distance dialing (DDD) is a telecommunications service in North America by which a caller may call any other subscriber outside the local calling area without operator assistance, DDD was introduced in the United States in 1951, on a trial basis, with service from Englewood, New Jersey. Direct long-distance dialing by subscribers requires extra digits, called an area code, to be dialed as prefixes to the directory telephone number of the destination. International Direct Distance Dialing (IDDD) extends the system beyond the geographic boundaries of the North American Numbering Plan (NANP). History The first direct-dialed long-distance telephone calls were possible in the New Jersey communities of Englewood and Teaneck. Customers of the ENglewood 3, ENglewood 4 and TEaneck 7 exchanges, who could already dial telephone numbers in the New York City area, could place calls to eleven major cities across the United States by dialing the three-digit area code and the seven-di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georgian Court University
Georgian Court University (GCU or Georgian Court) is a private Catholic university in Lakewood Township, New Jersey, United States. Founded in 1908 by the Sisters of Mercy, the university has more than 1,600 undergraduates and nearly 600 graduate students. The institution became a university in 2004 and began admitting male students in 1994 after more than 100 years as a women's college. The university is open to students of all faiths, while emphasizing its mission of Mercy, which incorporates respect, justice, integrity, compassion, and service. The Lakewood campus (main campus) was added to the National Register of Historic Places in 1978Added on December 20, 1978: With and was designated a National Historic Landmark in 1985. History Location The main campus was built in 1899 on the former summer estate of the millionaire George Jay Gould, son of the railroad tycoon Jay Gould. The Goulds named their home ''Georgian Court'', probably after George or the Georgian-r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adjunct Professor
An adjunct professor is a type of academic appointment in higher education who does not work at the establishment full-time. The terms of this appointment and the job security of the tenure vary in different parts of the world, but the term is generally agreed to mean a bona-fide part-time faculty member in an adjunct position at an institution of higher education. Terminology An adjunct professor may also be called an adjunct lecturer, an adjunct instructor, or adjunct faculty. Collectively, they may be referred to as contingent academic labor. The rank of sessional lecturer in Canadian universities is similar to the US concept. Americas In the Academic ranks in the United States, United States, an adjunct is, in most cases, a non-Academic tenure, tenure-track faculty member. However, it can also be a scholar or teacher whose primary employer is not the school or department with which they have adjunct status. Adjunct professors make up the majority of instructors in higher ... [...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] |
Phi Beta Kappa
The Phi Beta Kappa Society () is the oldest academic honor society in the United States. It was founded in 1776 at the College of William & Mary in Virginia. Phi Beta Kappa aims to promote and advocate excellence in the liberal arts and sciences, and to induct outstanding students of arts and sciences at select American colleges and universities. Since its inception, its inducted members include 17 President of the United States, United States presidents, 42 Supreme Court of the United States, United States Supreme Court justices, and 136 Nobel Prize, Nobel laureates. History Origins The Phi Beta Kappa Society had its first meeting on December 5, 1776, at the College of William & Mary in Williamsburg, Virginia by five students, with John Heath as its first President. The society established the precedent for naming American college societies after the initial letters of a secret Greek motto. The group consisted of students who frequented the Raleigh Tavern as a common meeting ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Association For The Advancement Of Science
The American Association for the Advancement of Science (AAAS) is a United States–based international nonprofit with the stated mission of promoting cooperation among scientists, defending scientific freedom, encouraging scientific responsibility, and supporting science education, scientific education and science outreach for the betterment of all humanity. AAAS was the first permanent organization established to promote science and engineering nationally and to represent the interests of American researchers from across all scientific fields. It is the world's largest general scientific society, with over 120,000 members, and is the publisher of the well-known scientific journal ''Science (journal), Science''. History Creation The American Association for the Advancement of Science was created on September 20, 1848, at the Academy of Natural Sciences in Philadelphia, Pennsylvania. It was a reformation of the Association of American Geologists and Naturalists with the broaden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Physical Society
The American Physical Society (APS) is a not-for-profit membership organization of professionals in physics and related disciplines, comprising nearly fifty divisions, sections, and other units. Its mission is the advancement and diffusion of knowledge of physics. It publishes more than a dozen scientific journals, including the prestigious '' Physical Review'' and ''Physical Review Letters'', and organizes more than twenty science meetings each year. It is a member society of the American Institute of Physics. Since January 2021, it is led by chief executive officer Jonathan Bagger. History The American Physical Society was founded on May 20, 1899, when thirty-six physicists gathered at Columbia University for that purpose. They proclaimed the mission of the new Society to be "to advance and diffuse the knowledge of physics", and in one way or another the APS has been at that task ever since. In the early years, virtually the sole activity of the APS was to hold scientific m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The News Record (Cincinnati)
The University of Cincinnati (UC or Cincinnati, informally Cincy) is a public research university in Cincinnati, Ohio, United States. It was founded in 1819 and had an enrollment of over 53,000 students in 2024, making it the second-largest university in Ohio. It is part of the University System of Ohio. The university's primary uptown campus and medical campus are located in the Heights and Corryville neighborhoods, with branch campuses located in Batavia and Blue Ash, Ohio. The university has 14 constituent colleges, with programs in architecture, business, education, engineering, humanities, the sciences, law, music, and medicine. The medical college includes a leading teaching hospital and several biomedical research laboratories, with developments made including a live polio vaccine and diphenhydramine. UC was also the first university to implement a co-operative education (co-op) model. The university is accredited by the Higher Learning Commission and is classified ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phototransistor
A photodiode is a semiconductor diode sensitive to photon radiation, such as visible light, infrared or ultraviolet radiation, X-rays and gamma rays. It produces an electrical current when it absorbs photons. This can be used for detection and measurement applications, or for the generation of electrical power in solar cells. Photodiodes are used in a wide range of applications throughout the electromagnetic spectrum from visible light photocells to gamma ray spectrometers. Principle of operation A photodiode is a PIN structure or p–n junction. When a photon of sufficient energy strikes the diode, it creates an electron–hole pair. This mechanism is also known as the inner photoelectric effect. If the absorption occurs in the junction's depletion region, or one diffusion length away from it, these carriers are swept from the junction by the built-in electric field of the depletion region. Thus holes move toward the anode, and electrons toward the cathode, and a photocurrent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
