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RV Mirai
RV ''Mirai'' is a Japanese oceanographic research vessel. She was originally built as the nuclear-powered general cargo ship ', but never carried commercial cargo.http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/27/029/27029493.pdf History Development and construction ''Mutsu'' (1972–1996) The reactor was completed on 25 August 1972, and fuel was loaded on 4 September. Good overview of the construction, leak, and lessons learnt. When officials announced that the first test run was to be run at the pier in Ōminato, local protests forced them to reconsider. Eventually it was decided to test the ship in the open ocean, east of Cape Shiriya. The ship departed Ōminato on 26 August 1974, and the reactor attained criticality on 28 August. Radiation accident As the crew brought the reactor up to 1.4% of capacity at 5pm on 1 September 1974, there was a minor shielding inadequacy that permitted the escape of neutrons and gamma rays from the reactor shielding e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Mutsu, Aomori
is a Cities of Japan, city located in Aomori Prefecture, Japan. , the city had an estimated population of 53,804 in 28,553 households, and a population density of 62 persons per km2. The total area of the city is , making it the largest municipality in Aomori Prefecture in terms of area. Geography Mutsu occupies most of Shimokita Peninsula and is bordered by Mutsu Bay to the south and Tsugaru Strait to the north, and is the northernmost city on the island of Honshū. The volcanic Mount Osore, Osorezan Mountain Range extends across the western and central portion of the city, and includes a number of caldera lakes. Mount Hiuchidake, 781 meters above sea level, is on the north side, and Mount Osore is on the south side. At the center of Mount Osore is a caldera with a diameter of about 3 kilometers, inside which is a caldera lake called Lake Usori. Mount Kamabu (elevation 879 m) is located southeast of the caldera's outer rim, and is the highest point of Mount Osore. The Tanabe Riv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Controllable Pitch Propeller
Controllability is an important property of a control system and plays a crucial role in many regulation problems, such as the stabilization of unstable systems using feedback, tracking problems, obtaining optimal control strategies, or, simply prescribing an input that has a desired effect on the state. Controllability and observability are dual notions. Controllability pertains to regulating the state by a choice of a suitable input, while observability pertains to being able to know the state by observing the output (assuming that the input is also being observed). Broadly speaking, the concept of controllability relates to the ability to steer a system around in its configuration space using only certain admissible manipulations. The exact definition varies depending on the framework or the type of models dealt with. The following are examples of variants of notions of controllability that have been introduced in the systems and control literature: * State controllability ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Research Vessels Of Japan
Research is creative and systematic work undertaken to increase the stock of knowledge. It involves the collection, organization, and analysis of evidence to increase understanding of a topic, characterized by a particular attentiveness to controlling sources of bias and error. These activities are characterized by accounting and controlling for biases. A research project may be an expansion of past work in the field. To test the validity of instruments, procedures, or experiments, research may replicate elements of prior projects or the project as a whole. The primary purposes of basic research (as opposed to applied research) are documentation, discovery, interpretation, and the research and development (R&D) of methods and systems for the advancement of human knowledge. Approaches to research depend on epistemologies, which vary considerably both within and between humanities and sciences. There are several forms of research: scientific, humanities, artistic, economic, s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Sevmorput
''Sevmorput'' ( rus, Севморпуть, p=sʲɪvmɐrˈputʲ, Northeast Passage) is a Russian nuclear-powered cargo ship. The 1988-built vessel is one of only four nuclear-powered merchant ships ever built and, after returning to service in 2016 following an extensive refit, the only such vessel to remain in service . History Development and construction After the Second World War, the Soviet Union began developing the Northern Sea Route in order to support the economic exploitation of the vast natural resources of the northern regions. The ambitious plan initiated by the 20th Congress of the Communist Party of the Soviet Union in the 1950s led to the construction of powerful icebreakers to escort cargo ships through the ice-covered waters and extend the navigating season in the Russian Arctic. The flagship of the post-war Soviet icebreaker fleet was the world's first nuclear-powered icebreaker, ''Lenin''. While numerous warships and submarines were built with nuclear mari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Otto Hahn (ship)
''Otto Hahn'' was one of only four List of civilian nuclear ships, nuclear-powered cargo vessels built to date. Planning of a German-built trade and research vessel to test the feasibility of nuclear power in civil service began in 1960 under the supervision of German physicist Erich Bagge. Launched in 1964, her nuclear reactor was deactivated 15 years later in 1979 and replaced by a conventional diesel engine room. The ship was scrapped in 2009. History ''Otto Hahn''s keel was laid down in 1963 by Howaldtswerke Deutsche Werft AG of Kiel. She was ship naming and launching, launched in 1964 and named in honour of Professor Otto Hahn, the German chemist and Nobel Prize-winner, who discovered the nuclear fission of uranium in 1938. The first captain of the ''Otto Hahn'' was Heinrich Lehmann-Willenbrock, a German U-boat ace of World War II. In 1968, the ship's 38-megawatt nuclear reactor was taken critical and sea trials began. In October of that year, NS ''Otto Hahn'' was certif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
NS Savannah
NS ''Savannah'' was the first nuclear-powered merchant ship. She was built in the late 1950s at a cost of $46.9 million (including a $28.3 million nuclear reactor and fuel core) and launched on July 21, 1959. She was funded by United States government agencies. ''Savannah'' was a demonstration project for the potential use of nuclear energy. The ship was named after , the first steamship to cross the Atlantic ocean. She was in service between 1962 and 1972 as one of only four nuclear-powered cargo ships ever built. (The Soviet ice-breaker ''Lenin'', launched on December 5, 1957, was the first nuclear-powered civilian ship.) ''Savannah'' was deactivated in 1971 and after several moves was moored at Pier 13 of the Canton Marine Terminal in Baltimore, Maryland in 2008. Origin In 1955, President Dwight D. Eisenhower proposed building a nuclear-powered merchant ship as a showcase for his " Atoms for Peace" initiative. The next year, the United States Congress autho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Sasebo, Nagasaki
is a Core cities of Japan, core city located in Nagasaki Prefecture, Japan. It is the second-largest city in Nagasaki Prefecture, after its capital, Nagasaki. , the city had an estimated population of 230,873 in 102,670 households, and a population density of 540 persons per km2. The total area of the city is . Geography Sasebo is located in the northwestern part of Kyushu, in the northern part of Nagasaki Prefecture, from the base of the Kitamatsuura Peninsula to the central and southern part of the peninsula. It is located about 50 kilometers north-northwest of Nagasaki City (the shortest distance by land is about 60 kilometers). The west, southwest, and southern parts of the city face the sea, and the east borders Saga Prefecture. The city includes the island of Ukujima, at the northern end of the Goto Islands. Although not as steep as Nagasaki City, the city is characterized by many hills. Because the mountains approach the central downtown area in the center of the city, bic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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] [Amazon] |
Nuclear Marine Propulsion
Nuclear marine propulsion is Marine propulsion, propulsion of a ship or submarine with heat provided by a nuclear reactor. The power plant heats water to produce steam for a turbine used to turn the ship's propeller through a Transmission (mechanics), gearbox or through an electric generator and motor. Nuclear propulsion is used primarily within naval warships such as nuclear submarines and supercarriers. A small number of experimental civil nuclear ships have been built. Compared to oil- or coal-fuelled ships, nuclear propulsion offers the advantage of very long intervals of operation before refueling. All the fuel is contained within the nuclear reactor, so no cargo or supplies space is taken up by fuel, nor is space taken up by exhaust stacks or combustion air intakes. The low fuel cost is offset by high operating costs and investment in infrastructure, however, so nearly all nuclear-powered vessels are military. Power plants Basic operation of naval ship or submarine Most na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Research Vessel
A research vessel (RV or R/V) is a ship or boat designed, modified, or equipped to carry out research at sea. Research vessels carry out a number of roles. Some of these roles can be combined into a single vessel but others require a dedicated vessel. Due to the demanding nature of the work, research vessels may be constructed around an icebreaker hull, allowing them to operate in polar waters. History The research ship had origins in the early voyages of exploration. By the time of James Cook's ''Endeavour'', the essentials of what today we would call a research ship are clearly apparent. In 1766, the Royal Society hired Cook to travel to the Pacific Ocean to observe and record the transit of Venus across the Sun. The ''Endeavour'' was a sturdy vessel, well designed and equipped for the ordeals she would face, and fitted out with facilities for her "research personnel", Joseph Banks. As is common with contemporary research vessels, ''Endeavour'' also carried out more t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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] [Amazon] |
