|
Theodore Theodorsen
Theodore Theodorsen (January 8, 1897 – November 5, 1978) was a Norwegian-American theoretical aerodynamicist noted for his work at NACA (the forerunner of NASA) and for his contributions to the study of turbulence. Early years Theodorsen was born at Sandefjord in Vestfold, Norway to parents Ole Christian Theodorsen, a chief engineer in the Norwegian merchant marine, and his wife Andrea Larsen. He was the oldest of six children. When Theodore’s father took the examinations for a merchant marine engineer's license, he was the only applicant who correctly answered a particularly difficult question. To his father’s surprise his then 12-year-old son was also able to solve the problem. At age 16, after finishing compulsory schooling, Theodorsen attended gymnasium in the nearby town of Larvik. Theodorsen's grades were so outstanding that he was admitted to the leading engineering university in Norway, the Norwegian Institute of Technology in Trondheim. Emig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandefjord
Sandefjord () is a city and the most populous municipality in Vestfold og Telemark county, Norway. The municipality of Sandefjord was established on 1 January 1838. The municipality of Sandar was merged into Sandefjord on 1 January 1969. On 1 January 2017, rural municipalities of Andebu and Stokke were merged into Sandefjord as part of a nationwide municipal reform. This merger was the first one to take place during the reform. The city is known for its rich Viking history and the prosperous whaling industry, which made Sandefjord the richest city in Norway.Porter, Darwin and Danforth Prince (2003). ''Frommer's Norway''. Wiley. p. 158. . Today, it has built up the third-largest merchant fleet in Norway. It is home to Europe's only museum dedicated to whaling, and is home to Gokstad Mound where the 9th century Gokstad Ship was discovered. Sandefjord has numerous nicknames, including the Viking, Whaling "capital" of Norway or as the undisputed summer city of Norway. The city is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lars Onsager
Lars Onsager (November 27, 1903 – October 5, 1976) was a Norwegian-born American physical chemist and theoretical physicist. He held the Gibbs Professorship of Theoretical Chemistry at Yale University. He was awarded the Nobel Prize in Chemistry in 1968. Education and early life Lars Onsager was born in Kristiania (now Oslo), Norway. His father was a lawyer. After completing secondary school in Oslo, he attended the Norwegian Institute of Technology (NTH) in Trondheim, graduating as a chemical engineer in 1925. Career and research In 1925 he arrived at a correction to the Debye-Hückel theory of electrolytic solutions, to specify Brownian movement of ions in solution, and during 1926 published it. He traveled to Zürich, where Peter Debye was teaching, and confronted Debye, telling him his theory was wrong. He impressed Debye so much that he was invited to become Debye's assistant at the Eidgenössische Technische Hochschule (ETH), where he remained until 1928. J ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Langley Air Force Base
Langley Air Force Base is a United States Air Force base located in Hampton, Virginia, adjacent to Newport News. It was one of thirty-two Air Service training camps established after the entry of the United States into World War I in April 1917. On 1 October 2010, Langley Air Force Base was joined with Fort Eustis to become Joint Base Langley–Eustis. The base was established in accordance with congressional legislation implementing the recommendations of the 2005 Base Realignment and Closure Commission. The legislation ordered the consolidation of the two facilities which were nearby, but separate military installations, into a single joint base, one of 12 formed in the United States as a result of the law. Overview The Air Force mission at Langley is to sustain the ability for fast global deployment and air superiority for the United States or allied armed forces. The base is one of the oldest facilities of the Air Force, having been established on 30 December 1916, p ... [...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 phenomena, and usually frame their understanding in mathematical terms. Physicists work across a wide range of research fields, spanning all length scales: from sub-atomic and particle physics, through biological physics, to cosmological length scales encompassing the universe as a whole. The field generally includes two types of physicists: experimental physicists who specialize in the observation of natural phenomena and the development and analysis of experiments, and theoretical physicists who specialize in mathematical modeling of physical systems to rationalize, explain and predict natural phenomena. Physicists can apply their knowledge towards solving practical problems or to developing new technologies (also known as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Advisory Committee For Aeronautics
The National Advisory Committee for Aeronautics (NACA) was a United States federal agency founded on March 3, 1915, to undertake, promote, and institutionalize aeronautical research. On October 1, 1958, the agency was dissolved and its assets and personnel were transferred to the newly created National Aeronautics and Space Administration (NASA). NACA is an initialism, i.e., pronounced as individual letters, rather than as a whole word (as was NASA during the early years after being established). Among other advancements, NACA research and development produced the NACA duct, a type of air intake used in modern automotive applications, the NACA cowling, and several series of NACA airfoils, which are still used in aircraft manufacturing. During World War II, NACA was described as "The Force Behind Our Air Supremacy" due to its key role in producing working superchargers for high altitude bombers, and for producing the laminar wing profiles for the North American P-51 Mustang. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joseph Sweetman Ames
Joseph Sweetman Ames (July 3, 1864 – June 24, 1943) was a physicist, professor at Johns Hopkins University, provost of the university from 1926 to 1929, and university president from 1929 to 1935. He is best remembered as one of the founding members of the National Advisory Committee for Aeronautics (NACA, the predecessor of NASA) and its longtime chairman (1919–1939). NASA Ames Research Center is named after him. He was elected a Fellow of the American Academy of Arts and Sciences in 1911. He was the 1935 recipient of the Langley Gold Medal from the Smithsonian Institution. Ames was also an assistant editor of ''The Astrophysical Journal'' and associate editor of the '' American Journal of Science''; editor-in-chief of the ''Scientific Memoir Series''; and editor of Joseph von Fraunhofer's memoirs on ''Prismatic and Diffractive Spectra'' (1898).Henry Crew (1944Biographical Memoir of Joseph Sweetman Amesfrom National Academy of Sciences Career Joseph Sweetman Ames was bor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detonation
Detonation () is a type of combustion involving a supersonic exothermic front accelerating through a medium that eventually drives a shock front propagating directly in front of it. Detonations propagate supersonically through shock waves with speeds in the range of 1 km/sec and differ from deflagrations which have subsonic flame speeds in the range of 1 m/sec. Detonations occur in both conventional solid and liquid explosives, as well as in reactive gases. The velocity of detonation in solid and liquid explosives is much higher than that in gaseous ones, which allows the wave system to be observed with greater detail (higher resolution). A very wide variety of fuels may occur as gases (e.g. hydrogen), droplet fogs, or dust suspensions. In addition to dioxygen, oxidants can include halogen compounds, ozone, hydrogen peroxide and oxides of nitrogen. Gaseous detonations are often associated with a mixture of fuel and oxidant in a composition somewhat below conventional flammab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Combustion
Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke. Combustion does not always result in fire, because a flame is only visible when substances undergoing combustion vaporize, but when it does, a flame is a characteristic indicator of the reaction. While the activation energy must be overcome to initiate combustion (e.g., using a lit match to light a fire), the heat from a flame may provide enough energy to make the reaction self-sustaining. Combustion is often a complicated sequence of elementary radical reactions. Solid fuels, such as wood and coal, first undergo endothermic pyrolysis to produce gaseous fuels whose combustion then supplies the heat required to produce more of them. Combustion is often hot enough that incandescent light in the form of either glowing or a flame is produce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerodynamic
Aerodynamics, from grc, ἀήρ ''aero'' (air) + grc, δυναμική (dynamics), is the study of the motion of air, particularly when affected by a solid object, such as an airplane wing. It involves topics covered in the field of fluid dynamics and its subfield of gas dynamics. The term ''aerodynamics'' is often used synonymously with gas dynamics, the difference being that "gas dynamics" applies to the study of the motion of all gases, and is not limited to air. The formal study of aerodynamics began in the modern sense in the eighteenth century, although observations of fundamental concepts such as aerodynamic drag were recorded much earlier. Most of the early efforts in aerodynamics were directed toward achieving heavier-than-air flight, which was first demonstrated by Otto Lilienthal in 1891. Since then, the use of aerodynamics through mathematical analysis, empirical approximations, wind tunnel experimentation, and computer simulations has formed a rational basis f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermodynamic
Thermodynamics is a branch of physics that deals with heat, work, and temperature, and their relation to energy, entropy, and the physical properties of matter and radiation. The behavior of these quantities is governed by the four laws of thermodynamics which convey a quantitative description using measurable macroscopic physical quantities, but may be explained in terms of microscopic constituents by statistical mechanics. Thermodynamics applies to a wide variety of topics in science and engineering, especially physical chemistry, biochemistry, chemical engineering and mechanical engineering, but also in other complex fields such as meteorology. Historically, thermodynamics developed out of a desire to increase the efficiency of early steam engines, particularly through the work of French physicist Sadi Carnot (1824) who believed that engine efficiency was the key that could help France win the Napoleonic Wars. Scots-Irish physicist Lord Kelvin was the first to for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physics
Physics is the natural science that studies matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." Physics is one of the most fundamental scientific disciplines, with its main goal being to understand how the universe behaves. "Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doctorate
A doctorate (from Latin ''docere'', "to teach"), doctor's degree (from Latin ''doctor'', "teacher"), or doctoral degree is an academic degree awarded by universities and some other educational institutions, derived from the ancient formalism '' licentia docendi'' ("licence to teach"). In most countries, a research degree qualifies the holder to teach at university level in the degree's field or work in a specific profession. There are a number of doctoral degrees; the most common is the Doctor of Philosophy (PhD), awarded in many different fields, ranging from the humanities to scientific disciplines. In the United States and some other countries, there are also some types of technical or professional degrees that include "doctor" in their name and are classified as a doctorate in some of those countries. Professional doctorates historically came about to meet the needs of practitioners in a variety of disciplines. Many universities also award honorary doctorates to individ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
