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Alexei Krylov
Aleksey Nikolaevich Krylov (; – October 26, 1945) was a Russian naval engineer, applied mathematician and memoirist. Biography Aleksey Nikolayevich Krylov was born on August 3 O.S., 1863 in Visyaga village near the town of Alatyr, Simbirsk Governorate, Russian Empire (today Krylovo, Chuvashia) to the family of a retired artillery officer. His father, Nikolay Aleksandrovich Krylov (1830-1911), was the local landlord and vice-Marshal of Nobility, but had relatively liberal views and later led the ''zemskaya uprava'' (the Executive Board of the Zemstvo self-government system) in Alatyr. His mother, née Sofya Viktorovna Lyapunova, was a member of the distinguished Lyapunov family (the mathematician Aleksandr Mikhailovich Lyapunov and musician Sergei Mikhailovich Lyapunov were his second cousins). In 1878 Krylov entered the Naval College (rus. Морское училище) and graduated with distinction in 1884. There he did his first scientific work with Ivan de Collong o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Krylov
Krylov (masculine; ) and Krylova (feminine; ) is a Russian surname, derived from the word "''крыло́"'' (wing). Alternative spellings are Krilov, Kryloff, Kriloff (masculine) and Krilova (feminine). People * Alexei Krylov (1863–1945), Russian naval engineer and applied mathematician * Alexander Krylov (born 1969), Soviet academician and scientist in the field of oil deposits development * Anna Krylov (born 1967), Soviet-born American theoretical chemist * Andrey Krylov (other), multiple people, including: ** Andrey Krylov (swimmer born 1956), Soviet swimmer ** Andrey Krylov (swimmer born 1984), Russian swimmer ** Andrey Krylov (gymnast) (born 1988), Russian trampolinist * Andrei Krylov, Russian guitarist and composer * Anjelika Krylova (born 1973), Russian ice dancer * Ivan Krylov (1769–1844), Russian poet and fabulist * Konstantin Krylov (1967–2020), Russian writer and journalist * Leonid Krylov (born 1980), Russian canoeist * Nikita Krylov (born 1992), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chuvashia
Chuvashia, officially known as Chuvash Republic — Chuvashia, is a republics of Russia, republic of Russia located in Eastern Europe. It is the homeland of the Chuvash people, a Turkic languages, Turkic ethnic group. Its capital city, capital is the types of inhabited localities in Russia, city of Cheboksary. As of the Russian Census (2010), 2010 Census, its population was 1,251,619. Geography The Chuvash Republic is located in the center of European Russia, in the heart of the Volga-Vyatka economic region, mostly to the west of the Volga River, in the Volga Upland. It borders with the Nizhny Novgorod Oblast in the west, Mari El Republic in the north, the Republic of Tatarstan in the east and southeast, Republic of Mordovia in the southwest, and the Ulyanovsk Oblast in the south. There are over two thousand rivers in the republic—with the major ones being the Volga, the Sura River, Sura, and the Tsivil River, Tsivil—as well as four hundred lakes. Some of the Volga River ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Froude
William Froude (; 28 November 1810 – 4 May 1879) was an English engineer, hydrodynamicist and naval architect. He was the first to formulate reliable laws for the resistance that water offers to ships (such as the hull speed equation) and for predicting their stability. Biography Froude was born at Dartington, Devon, England, the son of Robert Froude, Archdeacon of Totnes and was educated at Westminster School and Oriel College, Oxford, graduating with a first in mathematics in 1832. His first employment was as a surveyor on the South Eastern Railway which, in 1837, led to Brunel giving him responsibility for the construction of a section of the Bristol and Exeter Railway. It was here that he developed his empirical method of setting out track transition curves and introduced an alternative design to the helicoidal skew arch bridge at Rewe and Cowley Bridge Junction, near Exeter. During this period he lived in Cullompton and was Vicar's Warden at St Andrew's Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ship
A ship is a large watercraft, vessel that travels the world's oceans and other Waterway, navigable waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research and fishing. Ships are generally distinguished from boats, based on size, shape, load capacity and purpose. Ships have supported Geographic exploration, exploration, Global trade, trade, Naval warfare, warfare, Human migration, migration, colonization, and science. Ship transport is responsible for the largest portion of world commerce. The word ''ship'' has meant, depending on the era and the context, either just a large vessel or specifically a Full-rigged ship, ship-rigged sailing ship with three or more masts, each of which is Square rig, square-rigged. The earliest historical evidence of boats is found in Egypt during the 4th millennium BCE. In 2024, ships had a global cargo capacity of 2.4 billion tons, with the three largest classes being ships carrying dry bulk (43%), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mathematics
Mathematics is a field of study that discovers and organizes methods, Mathematical theory, theories and theorems that are developed and Mathematical proof, proved for the needs of empirical sciences and mathematics itself. There are many areas of mathematics, which include number theory (the study of numbers), algebra (the study of formulas and related structures), geometry (the study of shapes and spaces that contain them), Mathematical analysis, analysis (the study of continuous changes), and set theory (presently used as a foundation for all mathematics). Mathematics involves the description and manipulation of mathematical object, abstract objects that consist of either abstraction (mathematics), abstractions from nature orin modern mathematicspurely abstract entities that are stipulated to have certain properties, called axioms. Mathematics uses pure reason to proof (mathematics), prove properties of objects, a ''proof'' consisting of a succession of applications of in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint Petersburg
Saint Petersburg, formerly known as Petrograd and later Leningrad, is the List of cities and towns in Russia by population, second-largest city in Russia after Moscow. It is situated on the Neva, River Neva, at the head of the Gulf of Finland on the Baltic Sea. The city had a population of 5,601,911 residents as of 2021, with more than 6.4 million people living in the Saint Petersburg metropolitan area, metropolitan area. Saint Petersburg is the List of European cities by population within city limits, fourth-most populous city in Europe, the List of cities and towns around the Baltic Sea, most populous city on the Baltic Sea, and the world's List of northernmost items#Cities and settlements, northernmost city of more than 1 million residents. As the former capital of the Russian Empire, and a Ports of the Baltic Sea, historically strategic port, it is governed as a Federal cities of Russia, federal city. The city was founded by Tsar Peter the Great on 27 May 1703 on the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gyrocompass
A gyrocompass is a type of non-magnetic compass which is based on a fast-spinning disc and the rotation of the Earth (or another planetary body if used elsewhere in the universe) to find geographical Direction (geometry), direction automatically. A gyrocompass makes use of one of the seven fundamental ways to determine the heading of a vehicle. A gyroscope is an essential component of a gyrocompass, but they are different devices; a gyrocompass is built to use the effect of gyroscopic precession, which is a distinctive aspect of the general gyroscopic effect. Gyrocompasses, such as the fibre optic gyrocompass are widely used to provide a heading for navigation on ships. This is because they have two significant advantages over magnetic compasses: * they find true north as determined by the axis of the Earth's rotation, which is different from, and navigationally more useful than, Magnetic North Pole#Magnetic north and magnetic declination, ''magnetic'' north, and * they have a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compass
A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with North magnetic pole, magnetic north. Other methods may be used, including gyroscopes, magnetometers, and GPS receivers. Compasses often show angles in degrees: north corresponds to 0°, and the angles increase clockwise, so east is 90°, south is 180°, and west is 270°. These numbers allow the compass to show azimuths or bearing (angle), bearings which are commonly stated in degrees. If local magnetic declination, variation between magnetic north and true north is known, then direction of magnetic north also gives direction of true north. Among the Four Great Inventions, the magnetic compass was first invented as a device for divination as early as the history of science and technology in China, Chinese Han dynasty (since c. 206 BC),#Li, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Deviation
Magnetic deviation is the error induced in a compass by ''local'' magnetic fields, which must be allowed for, along with magnetic declination, if accurate bearings are to be calculated. (More loosely, "magnetic deviation" is used by some to mean the same as "magnetic declination". This article is about the former meaning.) Compass readings Compasses are used to determine the direction of true North. However, the compass reading must be corrected for two effects. The first is magnetic declination or variation—the angular difference between ''magnetic North'' (the local direction of the Earth's magnetic field) and true North.Admiralty Manual of Navigation Vol 1 1964 p12 The second is ''magnetic deviation''—the angular difference between magnetic North and the compass needle due to nearby sources of interference such as magnetically permeable bodies, or other magnetic fields within the field of influence. Sources In navigation manuals, ''magnetic deviation'' refers specificall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Alexander Heinrich Clapier De Colongue
Jean Alexander Heinrich Clapier de Colongue (; ) (–) was a Baltic German marine engineer and founder of a theory of magnetic deviation for magnetic compasses, living and working in Imperial Russia. Biography Ivan Petrovich de Collong was born in 1839 in Dünaburg (now Daugavpils) into a Baltic German noble family originally of Franco-Portuguese origin. He studied at the Naval Academy in Saint Petersburg and from 1870 he worked there as a lecturer. Starting in 1878 he was head of the Navy's Main Hydrographical Administration. In 1875, he constructed a ''deflector'' (a new type of compass baffle) and later improved upon its design. De Collong was a Corresponding Member of the Russian Academy of Sciences (from 1896) and a Major-General of the Imperial Russian Navy. He was awarded the Lomonosov Prize by the Russian Academy of Sciences. See also * List of Russian inventors * List of Baltic German scientists References External links Memoirs ofAlexei Krylov Aleksey ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sergei Lyapunov
Sergei Mikhailovich Lyapunov (or Liapunov; , ; 8 November 1924) was a Russian composer, pianist and conductor. Life Lyapunov was born in Yaroslavl in 1859. After the death of his father, Mikhail Lyapunov, when he was about eight, Sergei, his mother, and his two brothers (one of them was Aleksandr Lyapunov, later a notable mathematician) went to live in the larger town of Nizhny Novgorod. There he attended the grammar school along with classes of the newly formed local branch of the Russian Musical Society. On the recommendation of Nikolai Rubinstein, the Director of the Moscow Conservatory of Music, he enrolled in that institution in 1878. His main teachers were Karl Klindworth (piano; a former pupil of Franz Liszt), and Sergei Taneyev (composition; a former pupil of Pyotr Ilyich Tchaikovsky and his successor at the Conservatory). He graduated in 1883, more attracted by the nationalist elements in music of the New Russian School than by the more cosmopolitan approach of Tchaikovsk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
