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John P. Craven
John Piña Craven (October 30, 1924 – February 12, 2015) was an American scientist who was known for his involvement with Bayesian search theory and the recovery of lost objects at sea. He was Chief Scientist of the Special Projects Office of the United States Navy. Biography John Piña Craven was born in Brooklyn, New York, in 1924. He held a Bachelor of Arts degree from Cornell University, a Master of Science degree from the California Institute of Technology, a Ph.D. from the University of Iowa, and a law degree from the National Law Center of the George Washington University.Craven, John Piña (2001). ''The Silent War: The Cold War Battle Beneath the Sea'', New York: Simon & Schuster. He met his wife, Dorothy Drakesmith, while attending the University of Iowa. Craven had 40 years of experience in the innovation, development, design, construction, and operational deployment of major oceanic systems. As a boy, John Piña Craven studied ocean technology at the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brooklyn, New York
Brooklyn is a Boroughs of New York City, borough of New York City located at the westernmost end of Long Island in the New York (state), State of New York. Formerly an independent city, the borough is coextensive with Kings County, one of twelve original counties established under English rule in 1683 in what was then the Province of New York. As of the 2020 United States census, the population stood at 2,736,074, making it the most populous of the five boroughs of New York City, and the most populous Administrative divisions of New York (state)#County, county in the state.Table 2: Population, Land Area, and Population Density by County, New York State - 2020 New York State Department of Health. Accessed January 2, 2024. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oceanography
Oceanography (), also known as oceanology, sea science, ocean science, and marine science, is the scientific study of the ocean, including its physics, chemistry, biology, and geology. It is an Earth science, which covers a wide range of topics, including ocean currents, waves, and geophysical fluid dynamics; fluxes of various chemical substances and physical properties within the ocean and across its boundaries; ecosystem dynamics; and plate tectonics and seabed geology. Oceanographers draw upon a wide range of disciplines to deepen their understanding of the world’s oceans, incorporating insights from astronomy, biology, chemistry, geography, geology, hydrology, meteorology and physics. History Early history Humans first acquired knowledge of the waves and currents of the seas and oceans in pre-historic times. Observations on tides were recorded by Aristotle and Strabo in 384–322 BC. Early exploration of the oceans was primarily for cartography and mainly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mediterranean Sea
The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern Europe, on the south by North Africa, and on the west almost by the Morocco–Spain border. The Mediterranean Sea covers an area of about , representing 0.7% of the global ocean surface, but its connection to the Atlantic via the Strait of Gibraltar—the narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates the Iberian Peninsula in Europe from Morocco in Africa—is only wide. Geological evidence indicates that around 5.9 million years ago, the Mediterranean was cut off from the Atlantic and was partly or completely desiccation, desiccated over a period of some 600,000 years during the Messinian salinity crisis before being refilled by the Zanclean flood about 5.3 million years ago. The sea was an important ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermonuclear Weapon
A thermonuclear weapon, fusion weapon or hydrogen bomb (H-bomb) is a second-generation nuclear weapon design. Its greater sophistication affords it vastly greater destructive power than first-generation nuclear bombs, a more compact size, a lower mass, or a combination of these benefits. Characteristics of nuclear fusion reactions make possible the use of non-fissile depleted uranium as the weapon's main fuel, thus allowing more efficient use of scarce fissile material. Its multi-stage design is distinct from the usage of fusion in simpler Boosted fission weapon, boosted fission weapons. The first full-scale thermonuclear test (Ivy Mike) was carried out by the United States in 1952, and the concept has since been employed by at least the five recognized List of states with nuclear weapons#Recognized nuclear-weapon states, nuclear-weapon states and United Nations Security Council, UNSC Permanent members of the United Nations Security Council, permanent members: the Nuclear weapons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bayesian Probability
Bayesian probability ( or ) is an interpretation of the concept of probability, in which, instead of frequency or propensity of some phenomenon, probability is interpreted as reasonable expectation representing a state of knowledge or as quantification of a personal belief. The Bayesian interpretation of probability can be seen as an extension of propositional logic that enables reasoning with hypotheses; that is, with propositions whose truth or falsity is unknown. In the Bayesian view, a probability is assigned to a hypothesis, whereas under frequentist inference, a hypothesis is typically tested without being assigned a probability. Bayesian probability belongs to the category of evidential probabilities; to evaluate the probability of a hypothesis, the Bayesian probabilist specifies a prior probability. This, in turn, is then updated to a posterior probability in the light of new, relevant data (evidence). The Bayesian interpretation provides a standard set of procedur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ballistic Missile Submarine
A ballistic missile submarine is a submarine capable of deploying submarine-launched ballistic missiles (SLBMs) with nuclear warheads. These submarines became a major weapon system in the Cold War because of their nuclear deterrence capability. They can fire missiles thousands of kilometers from their targets, and acoustic quieting makes them difficult to detect (see acoustic signature), thus making them a survivable deterrent in the event of a first strike and a key element of the mutual assured destruction policy of nuclear deterrence. The deployment of ballistic missile submarines is dominated by the United States, Russia (following the collapse of the Soviet Union) and China. In fact, 70% of nuclear warheads in the USA are carried by ballistic missile submarines.Rafal, A. S. (2021). THE FUTURE OF SUBMARINE WARFARE: NUCLEAR POWERED SUBMARINES ARE THE BEDROCK OF NAVAL WARFARE, OR MAYBE NOT. MS Thesis. Joint Forces Staff College-NDU, Joint Advanced Warfighting School]. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Submarine
A nuclear submarine is a submarine powered by a nuclear reactor, but not necessarily nuclear-armed. Nuclear submarines have considerable performance advantages over "conventional" (typically diesel-electric) submarines. Nuclear propulsion, being completely independent of air, frees the submarine from the need to surface frequently, as is necessary for conventional submarines. The large amount of power generated by a nuclear reactor allows nuclear submarines to operate at high speed for long periods, and the long interval between refuelings grants a virtually unlimited range, making the only limits on voyage times factors such as the need to restock food or other consumables. Thus nuclear propulsion solves the problem of limited mission duration that all electric ( battery or fuel cell powered) submarines face. The high cost of nuclear technology means that relatively few of the world's military powers have fielded nuclear submarines. Radiation incidents have occurred wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carderock, Maryland
Carderock is a neighborhood located in Montgomery County, Maryland, United States, along the Potomac River. It is located in the southern part of the Potomac census-designated place and western part of the Bethesda postal area. Carderock is well known for Carderock Division of the Naval Surface Warfare Center and rock climbing at Carderock Recreation Area, part of Chesapeake and Ohio Canal National Historical Park. Carderock also includes a local schoolCarderock Springs Elementary, Carderock Springs Swim and Tennis Club, and Congressional Country Club. Despite its proximity to the Capital Beltway, Carderock remains only moderately developed and traffic congested. This is due in part to the prominent presence of Rock Run, the Naval Surface Warfare Center, and Congressional Country Club. In addition, almost no roads running through Carderock have direct access to the Beltway. The only exceptions are River Road on the north end of the neighborhood and Clara Barton Parkway ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Surface Warfare Center
The Naval Surface Warfare Center (NSWC) is part of the Naval Sea Systems Command (NAVSEA) operated by the United States Navy The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio .... NAVSEA Warfare Centers supply the technical operations, people, technology, engineering services and products needed to equip and support the Fleet and meet the warfighter's needs. The Warfare Centers are the Navy's principal Research, Development, Test and Evaluation (RDT&E) assessment activity for surface ship and submarine systems and subsystems. Additionally, the Warfare Centers provide depot maintenance and In-Service Engineering support to ensure that the systems fielded today perform consistently and reliably in the future. NSWC Crane "is the world's third-largest naval installation by geographic ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Taylor Model Basin
The David W. Taylor Model Basin (DTMB) is one of the largest ship model basins—test facilities for the development of ship design—in the world. DTMB is a field activity of the Carderock Division of the Naval Surface Warfare Center. History In 1896, David Watson Taylor designed and supervised construction of the Washington Navy Yard's Experimental Model Basin which was at that time the best facility in the world. That facility was a significant design testing capability before, during, and after World War I. Inadequacies in that facility led the navy to look for a new model capability. The new navy modeling facility—named for David Taylor—was built in 1939 in today's community of Carderock just west of Bethesda, Maryland in Montgomery County. The Carderock facility contains multiple test basins (towing tanks for models) designed for a variety of testing capabilities. DTMB has strongly influenced naval architecture for 70 years. Technical capabilities Three adjoini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ensign (rank)
Ensign (; Middle English#Late Middle English, Late Middle English, from Old French ["mark", "symbol", "signal"; "flag", "standard", "pennant"], from Latin [plural]) is a junior rank of a Officer (armed forces)#Commissioned officers, commissioned officer in the armed forces of some countries, normally in the infantry or navy. As the junior officer in an infantry regiment was traditionally the carrier of the Military colours, standards and guidons, regimental colors, the rank acquired the name "ensign". This rank has generally been replaced in army ranks by second lieutenant. An ensign was generally the lowest-ranking commissioned officer, except where the rank of Subaltern (military), subaltern existed. In contrast, the Arab rank of ensign, لواء, ''liwa (Arabic), liwa''', derives from the command of a unit with an ensign, not from the carrier of the unit's ensign, and is today the equivalent of major general. According to Thomas Venn's 1672 ''Military and Maritime Disci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
V-12 Navy College Training Program
The V-12 Navy College Training Program was designed to supplement the force of commissioned officers in the United States Navy during World War II. Between July 1, 1943, and June 30, 1946, more than 125,000 participants were enrolled in 131 colleges and universities in the United States. Numerous participants attended classes and lectures at their respective colleges and earned completion degrees for their studies. Some even returned from their naval obligations to earn a degree from the colleges where they were previously stationed. The V-12 program's goal was to produce officers, not unlike the Army Specialized Training Program (ASTP), which sought to turn out more than 200,000 technically trained personnel in such fields as engineering, foreign languages, and medicine. Running from 1942 to 1944, the ASTP recruits were expected but not required to become officers at the end of their training. History The V-12 program was founded to generate a large number of officers for both t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
