1.
Geographic coordinate system
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A geographic coordinate system is a coordinate system used in geography that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are chosen such that one of the numbers represents a vertical position. A common choice of coordinates is latitude, longitude and elevation, to specify a location on a two-dimensional map requires a map projection. The invention of a coordinate system is generally credited to Eratosthenes of Cyrene. Ptolemy credited him with the adoption of longitude and latitude. Ptolemys 2nd-century Geography used the prime meridian but measured latitude from the equator instead. Mathematical cartography resumed in Europe following Maximus Planudes recovery of Ptolemys text a little before 1300, in 1884, the United States hosted the International Meridian Conference, attended by representatives from twenty-five nations. Twenty-two of them agreed to adopt the longitude of the Royal Observatory in Greenwich, the Dominican Republic voted against the motion, while France and Brazil abstained. France adopted Greenwich Mean Time in place of local determinations by the Paris Observatory in 1911, the latitude of a point on Earths surface is the angle between the equatorial plane and the straight line that passes through that point and through the center of the Earth. Lines joining points of the same latitude trace circles on the surface of Earth called parallels, as they are parallel to the equator, the north pole is 90° N, the south pole is 90° S. The 0° parallel of latitude is designated the equator, the plane of all geographic coordinate systems. The equator divides the globe into Northern and Southern Hemispheres, the longitude of a point on Earths surface is the angle east or west of a reference meridian to another meridian that passes through that point. All meridians are halves of great ellipses, which converge at the north and south poles, the prime meridian determines the proper Eastern and Western Hemispheres, although maps often divide these hemispheres further west in order to keep the Old World on a single side. The antipodal meridian of Greenwich is both 180°W and 180°E, the combination of these two components specifies the position of any location on the surface of Earth, without consideration of altitude or depth. The grid formed by lines of latitude and longitude is known as a graticule, the origin/zero point of this system is located in the Gulf of Guinea about 625 km south of Tema, Ghana. To completely specify a location of a feature on, in, or above Earth. Earth is not a sphere, but a shape approximating a biaxial ellipsoid. It is nearly spherical, but has an equatorial bulge making the radius at the equator about 0. 3% larger than the radius measured through the poles, the shorter axis approximately coincides with the axis of rotation
2.
Fat Man
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Fat Man was the codename for the atomic bomb that was detonated over the Japanese city of Nagasaki by the United States on 9 August 1945. It was the second of the two nuclear weapons ever used in warfare, the first being Little Boy, and its detonation marked the third-ever man-made nuclear explosion in history. It was built by scientists and engineers at Los Alamos Laboratory using plutonium from the Hanford Site, for the Fat Man mission, Bockscar was piloted by Major Charles W. Sweeney. The name Fat Man refers generically to the design of the bomb, because it had a wide. It was also known as the Mark III, Fat Man was an implosion-type nuclear weapon with a solid plutonium core. The first of type to be detonated was the Gadget, in the Trinity nuclear test, less than a month earlier on 16 July at the Alamogordo Bombing. Two more Fat Man bombs were detonated during the Operation Crossroads nuclear tests at Bikini Atoll in 1946, some 120 Fat Man units were produced between 1947 and 1949, when it was superseded by the Mark 4 nuclear bomb. The Fat Man was retired in 1950, a gun-type design was chosen, in which two sub-critical masses would be brought together by firing a bullet into a target. Tolman suggested an implosion-type nuclear weapon, but the idea attracted scant consideration, the feasibility of a plutonium bomb was questioned in 1942. Conant consulted Ernest Lawrence and Arthur Compton, who acknowledged that their scientists at Berkeley and Chicago respectively knew about the problem, the committee concluded that any problems could be overcome simply by requiring higher purity. Nonetheless, it was decided that the gun would receive the bulk of the research effort. It was assumed that the uranium gun-type bomb could be adapted from it. The gun-type and implosion-type designs were codenamed Thin Man and Fat Man respectively and these code names were created by Robert Serber, a former student of Oppenheimers who worked on the Manhattan Project. Little Boy would come last, as a variation of Thin Man and he was assisted in this work by Hugh Bradner, Charles Critchfield, and John Streib. L. T. E. Thompson was brought in as a consultant, Thompson was skeptical that an implosion could be made sufficiently symmetric. But Neddermeyers efforts in July and August at imploding tubes to produce cylinders tended to produce objects that resembled rocks, Neddermeyer was the only person who believed that implosion was practical, and only his enthusiasm kept the project alive. Oppenheimer brought John von Neumann to Los Alamos in September 1943 to take a look at implosion. The prospect of more-efficient nuclear weapons impressed Oppenheimer, Teller, and Hans Bethe, kistiakowskys name was immediately suggested, and Kistiakowsky was brought into the project as a consultant in October 1943
3.
Proximity fuze
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A proximity fuze is a fuze that detonates an explosive device automatically when the distance to the target becomes smaller than a predetermined value. Proximity fuzes are designed for such as planes, missiles, ships at sea. They provide a sophisticated trigger mechanism than the common contact fuze or timed fuze, it is estimated that it increases the lethality by 5 to 10 times. British military researchers Sir Samuel Curran and W. A. S. Butement invented a proximity fuze in the stages of World War II under the name VT. The system was a small, short range, Doppler radar, however, Britain lacked the capacity to develop the fuze, so the design was shown to the United States during the Tizard Mission in late 1940. The fuze needed to be miniaturized, survive the acceleration of cannon launch. Development was completed under the direction of physicist Merle A. Tuve at The Johns Hopkins University Applied Physics Lab, over 2000 American companies were mobilized to build some 20 million shell fuzes. The proximity fuze was one of the most important technological innovations of the war and it was so important that it was a secret guarded to a similar level as the atom bomb project or D-Day invasion. Adm. Lewis L. Strauss wrote that, One of the most original and effective military developments in World War II was the proximity, or VT and it was of incalculable value to both the Army and Navy, and it helped save London from obliteration. While no one won the war, the proximity fuze must be listed among the very small group of developments, such as radar. The fuze was later found to be able to detonate artillery shells in air bursts, the Germans were supposedly also working on proximity fuzes in the 1930s, based on capacitive effects rather than radar. Research and prototype work at Rheinmetall were halted in 1940 to devote resources to projects deemed more necessary. In the post-World War II era, a number of new proximity fuze systems were developed, including radio, optical, a common form used in modern air-to-air weapons uses a laser as an optical source and time-of-flight for ranging. Before the proximity fuzes invention, detonation was induced by direct contact, all of these earlier methods have disadvantages. The probability of a hit on a small moving target is low. A time- or height-triggered fuze requires an accurate prediction, if the setting is wrong, with a proximity fuze, the shell or missile need only pass close by the target at some time during its trajectory. The proximity fuze makes the problem simpler than the previous methods, Proximity fuzes are also useful for producing air bursts against ground targets. A contact fuze would explode when it hit the ground, it would not be effective at scattering shrapnel
4.
Nuclear weapon
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A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission or a combination of fission and fusion. Both reactions release vast quantities of energy from small amounts of matter. The first test of a bomb released the same amount of energy as approximately 20,000 tons of TNT. The first thermonuclear bomb test released the same amount of energy as approximately 10 million tons of TNT, a thermonuclear weapon weighing little more than 2,400 pounds can produce an explosive force comparable to the detonation of more than 1.2 million tons of TNT. A nuclear device no larger than traditional bombs can devastate a city by blast, fire. Nuclear weapons are considered weapons of destruction, and their use. Nuclear weapons have been used twice in nuclear warfare, both times by the United States against Japan near the end of World War II, the bombings resulted in the deaths of approximately 200,000 civilians and military personnel from acute injuries sustained from the explosions. The ethics of the bombings and their role in Japans surrender remain the subject of scholarly, since the atomic bombings of Hiroshima and Nagasaki, nuclear weapons have been detonated on over two thousand occasions for the purposes of testing and demonstration. Only a few nations possess such weapons or are suspected of seeking them, israel is also believed to possess nuclear weapons, though in a policy of deliberate ambiguity, it does not acknowledge having them. Germany, Italy, Turkey, Belgium and the Netherlands are nuclear weapons sharing states, south Africa is the only country to have independently developed and then renounced and dismantled its nuclear weapons. Modernisation of weapons continues to occur, all existing nuclear weapons derive some of their explosive energy from nuclear fission reactions. Weapons whose explosive output is exclusively from fission reactions are commonly referred to as bombs or atom bombs. This has long noted as something of a misnomer, as their energy comes from the nucleus of the atom. The latter approach is considered more sophisticated than the former and only the approach can be used if the fissile material is plutonium. A major challenge in all nuclear weapon designs is to ensure that a significant fraction of the fuel is consumed before the weapon destroys itself. The amount of energy released by fission bombs can range from the equivalent of just under a ton to upwards of 500,000 tons of TNT, all fission reactions necessarily generate fission products, the radioactive remains of the atomic nuclei split by the fission reactions. Many fission products are highly radioactive or moderately radioactive. Fission products are the radioactive component of nuclear fallout
5.
TNT equivalent
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TNT equivalent is a convention for expressing energy, typically used to describe the energy released in an explosion. The ton of TNT is a unit of energy defined by convention to be 4.184 gigajoules. The convention intends to compare the destructiveness of an event with that of conventional explosives, the kiloton is a unit of energy equal to 4.184 terajoules. The megaton is a unit of equal to 4.184 petajoules. The kiloton and megaton of TNT have traditionally used to describe the energy output. The TNT equivalent appears in various nuclear weapon control treaties, and has used to characterize the energy released in such other highly destructive events as an asteroid impact. A gram of TNT releases 2673–6702 J upon explosion, the energy liberated by one gram of TNT was arbitrarily defined as a matter of convention to be 4184 J, which is exactly one kilocalorie. The measured, pure heat output of a gram of TNT is only 2724 J, alternative TNT equivalency can be calculated as a function of when in the detonation the value is measured and which property is being compared. A kiloton of TNT can be visualized as a cube of TNT8.46 metres on a side, the RE factor is the relative mass of TNT to which an explosive is equivalent, the greater the RE, the more powerful the explosive. This enables engineers to determine the proper masses of different explosives when applying blasting formulas developed specifically for TNT. For example, if a timber-cutting formula calls for a charge of 1 kg of TNT, then based on octanitrocubanes RE factor of 2.38, using PETN, engineers would need 1. 0/1.66 kg to obtain the same effects as 1 kg of TNT. With ANFO or ammonium nitrate, they would require 1. 0/0.74 kg or 1. 0/0.42 kg, *, TBX or EBX, in a small, confined space, may have over twice the power of destruction. The total power of aluminized mixtures strictly depends on the condition of explosions, guide for the Use of the International System of Units. National Institute of Standards and Technology, nuclear Weapons FAQ Part 1.3 Rhodes, Richard. The Making of the Atomic Bomb, cooper, Paul W. Explosives Engineering, New York, Wiley-VCH, ISBN 0-471-18636-8 HQ Department of the Army, Field Manual 5-25, Explosives and Demolitions, Washington, D. C. Pentagon Publishing, pp. 83–84, ISBN 0-9759009-5-1 Explosives - Compositions, Alexandria, VA, thermobaric Explosives, Advanced Energetic Materials,2004. THE NATIONAL ACADEMIES PRESS, nap. edu, retrieved September 2004
6.
Russian language
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Russian is an East Slavic language and an official language in Russia, Belarus, Kazakhstan, Kyrgyzstan and many minor or unrecognised territories. Russian belongs to the family of Indo-European languages and is one of the four living members of the East Slavic languages, written examples of Old East Slavonic are attested from the 10th century and beyond. It is the most geographically widespread language of Eurasia and the most widely spoken of the Slavic languages and it is also the largest native language in Europe, with 144 million native speakers in Russia, Ukraine and Belarus. Russian is the eighth most spoken language in the world by number of native speakers, the language is one of the six official languages of the United Nations. Russian is also the second most widespread language on the Internet after English, Russian distinguishes between consonant phonemes with palatal secondary articulation and those without, the so-called soft and hard sounds. This distinction is found between pairs of almost all consonants and is one of the most distinguishing features of the language, another important aspect is the reduction of unstressed vowels. Russian is a Slavic language of the Indo-European family and it is a lineal descendant of the language used in Kievan Rus. From the point of view of the language, its closest relatives are Ukrainian, Belarusian, and Rusyn. An East Slavic Old Novgorod dialect, although vanished during the 15th or 16th century, is considered to have played a significant role in the formation of modern Russian. In the 19th century, the language was often called Great Russian to distinguish it from Belarusian, then called White Russian and Ukrainian, however, the East Slavic forms have tended to be used exclusively in the various dialects that are experiencing a rapid decline. In some cases, both the East Slavic and the Church Slavonic forms are in use, with different meanings. For details, see Russian phonology and History of the Russian language and it is also regarded by the United States Intelligence Community as a hard target language, due to both its difficulty to master for English speakers and its critical role in American world policy. The standard form of Russian is generally regarded as the modern Russian literary language, mikhail Lomonosov first compiled a normalizing grammar book in 1755, in 1783 the Russian Academys first explanatory Russian dictionary appeared. By the mid-20th century, such dialects were forced out with the introduction of the education system that was established by the Soviet government. Despite the formalization of Standard Russian, some nonstandard dialectal features are observed in colloquial speech. Thus, the Russian language is the 6th largest in the world by number of speakers, after English, Mandarin, Hindi/Urdu, Spanish, Russian is one of the six official languages of the United Nations. Education in Russian is still a choice for both Russian as a second language and native speakers in Russia as well as many of the former Soviet republics. Russian is still seen as an important language for children to learn in most of the former Soviet republics, samuel P. Huntington wrote in the Clash of Civilizations, During the heyday of the Soviet Union, Russian was the lingua franca from Prague to Hanoi
7.
Soviet Union
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The Soviet Union, officially the Union of Soviet Socialist Republics was a socialist state in Eurasia that existed from 1922 to 1991. It was nominally a union of national republics, but its government. The Soviet Union had its roots in the October Revolution of 1917 and this established the Russian Socialist Federative Soviet Republic and started the Russian Civil War between the revolutionary Reds and the counter-revolutionary Whites. In 1922, the communists were victorious, forming the Soviet Union with the unification of the Russian, Transcaucasian, Ukrainian, following Lenins death in 1924, a collective leadership and a brief power struggle, Joseph Stalin came to power in the mid-1920s. Stalin suppressed all opposition to his rule, committed the state ideology to Marxism–Leninism. As a result, the country underwent a period of rapid industrialization and collectivization which laid the foundation for its victory in World War II and postwar dominance of Eastern Europe. Shortly before World War II, Stalin signed the Molotov–Ribbentrop Pact agreeing to non-aggression with Nazi Germany, in June 1941, the Germans invaded the Soviet Union, opening the largest and bloodiest theater of war in history. Soviet war casualties accounted for the highest proportion of the conflict in the effort of acquiring the upper hand over Axis forces at battles such as Stalingrad. Soviet forces eventually captured Berlin in 1945, the territory overtaken by the Red Army became satellite states of the Eastern Bloc. The Cold War emerged by 1947 as the Soviet bloc confronted the Western states that united in the North Atlantic Treaty Organization in 1949. Following Stalins death in 1953, a period of political and economic liberalization, known as de-Stalinization and Khrushchevs Thaw, the country developed rapidly, as millions of peasants were moved into industrialized cities. The USSR took a lead in the Space Race with Sputnik 1, the first ever satellite, and Vostok 1. In the 1970s, there was a brief détente of relations with the United States, the war drained economic resources and was matched by an escalation of American military aid to Mujahideen fighters. In the mid-1980s, the last Soviet leader, Mikhail Gorbachev, sought to reform and liberalize the economy through his policies of glasnost. The goal was to preserve the Communist Party while reversing the economic stagnation, the Cold War ended during his tenure, and in 1989 Soviet satellite countries in Eastern Europe overthrew their respective communist regimes. This led to the rise of strong nationalist and separatist movements inside the USSR as well, in August 1991, a coup détat was attempted by Communist Party hardliners. It failed, with Russian President Boris Yeltsin playing a role in facing down the coup. On 25 December 1991, Gorbachev resigned and the twelve constituent republics emerged from the dissolution of the Soviet Union as independent post-Soviet states
8.
Nuclear weapons testing
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Nuclear weapons tests are experiments carried out to determine the effectiveness, yield, and explosive capability of nuclear weapons. Throughout the twentieth century, most nations that developed nuclear weapons tested them, the first nuclear device was detonated as a test by the United States at the Trinity site on July 16,1945, with a yield approximately equivalent to 20 kilotons of TNT. The first thermonuclear weapon technology test of engineer device, codenamed Mike, was tested at the Enewetak atoll in the Marshall Islands on November 1,1952, also by the United States. The largest nuclear weapon ever tested was the Tsar Bomba of the Soviet Union at Novaya Zemlya on October 30,1961, with the largest yield ever seen, the treaty permitted underground nuclear testing. France continued atmospheric testing until 1974, and China continued until 1980, underground tests in the United States continued until 1991, the Soviet Union until 1990, the United Kingdom until 1991, and both China and France until 1996. Non-signatories India and Pakistan last tested nuclear weapons in 1998, North Korea conducted nuclear tests in 2006,2009,2013, and 2016. The most recent confirmed nuclear test occurred in September 2016 in North Korea, Nuclear weapons tests have historically been divided into four categories reflecting the medium or location of the test. Atmospheric testing designates explosions that take place in the atmosphere, Nuclear explosions close enough to the ground to draw dirt and debris into their mushroom cloud can generate large amounts of nuclear fallout due to irradiation of the debris. This definition of atmospheric is used in the Limited Test Ban Treaty, underground testing refers to nuclear tests conducted under the surface of the earth, at varying depths. True underground tests are intended to be contained and emit a negligible amount of fallout. Unfortunately these nuclear tests do occasionally vent to the surface, producing from nearly none to considerable amounts of debris as a consequence. In 1976, the United States and the USSR agreed to limit the maximum yield of underground tests to 150 kt with the Threshold Test Ban Treaty. Underground testing also falls into two categories, tunnel tests in generally horizontal tunnel drifts, and shaft tests in vertically drilled holes. Exoatmospheric testing refers to tests conducted above the atmosphere. The test devices are lifted on rockets, underwater testing results from nuclear devices being detonated underwater, usually moored to a ship or a barge. Tests of this nature have usually been conducted to evaluate the effects of weapons against naval vessels. Another way to nuclear tests are by the number of explosions that constitute the test.1 second. The USSR has exploded up to eight devices in a single salvo test, Pakistans second, almost all lists in the literature are lists of tests, in the lists in Wikipedia, the lists are of explosions
9.
Joseph Stalin
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Joseph Vissarionovich Stalin was the leader of the Soviet Union from the mid-1920s until his death in 1953. Holding the post of the General Secretary of the Central Committee of the Communist Party of the Soviet Union, he was effectively the dictator of the state. Stalin was one of the seven members of the first Politburo, founded in 1917 in order to manage the Bolshevik Revolution, alongside Lenin, Zinoviev, Kamenev, Trotsky, Sokolnikov, and Bubnov. Among the Bolshevik revolutionaries who took part in the Russian Revolution of 1917 and he managed to consolidate power following the 1924 death of Vladimir Lenin by suppressing Lenins criticisms and expanding the functions of his role, all the while eliminating any opposition. He remained General Secretary until the post was abolished in 1952, the economic changes coincided with the imprisonment of millions of people in Gulag labour camps. The initial upheaval in agriculture disrupted food production and contributed to the catastrophic Soviet famine of 1932–33, major figures in the Communist Party and government, and many Red Army high commanders, were arrested and shot after being convicted of treason in show trials. Stalins invasion of Bukovina in 1940 violated the pact, as it went beyond the Soviet sphere of influence agreed with the Axis, Germany ended the pact when Hitler launched a massive invasion of the Soviet Union in June 1941. Despite heavy human and territorial losses, Soviet forces managed to halt the Nazi incursion after the decisive Battles of Moscow, after defeating the Axis powers on the Eastern Front, the Red Army captured Berlin in May 1945, effectively ending the war in Europe for the Allies. The Soviet Union subsequently emerged as one of two recognized world superpowers, the other being the United States, Communist governments loyal to the Soviet Union were established in most countries freed from German occupation by the Red Army, which later constituted the Eastern Bloc. Stalin also had relations with Mao Zedong in China and Kim Il-sung in North Korea. On February 9,1946, Stalin delivered a public speech in which he explained the fundamental incompatibility of communism and capitalism. He stressed that the system needed war for raw materials. The Second World War was but the latest in a chain of conflicts which could be broken only when the economy made the transformation into communism. Stalin led the Soviet Union through its post-war reconstruction phase, which saw a significant rise in tension with the Western world that would later be known as the Cold War, Stalin remains a controversial figure today, with many regarding him as a tyrant. However, popular opinion within the Russian Federation is mixed, the exact number of deaths caused by Stalins regime is still a subject of debate, but it is widely agreed to be in the order of millions. Joseph Stalin was born Ioseb Besarionis dze Jughashvili, the Russian-language version of his birth name is Iosif Vissarionovich Dzhugashvili. Ioseb was born on 18 December 1878 in the town of Gori, Georgia and his father was Besarion Jughashvili, a cobbler, while his mother was Ekaterine Keke Geladze, a housemaid. As a child, Ioseb was plagued with health issues
10.
Semipalatinsk Test Site
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The Semipalatinsk Test Site, also known as The Polygon, was the primary testing venue for the Soviet Unions nuclear weapons. It is located on the steppe in northeast Kazakhstan, south of the valley of the Irtysh River, the Soviet Union conducted 456 nuclear tests at Semipalatinsk from 1949 until 1989 with little regard for their effect on the local people or environment. The full impact of exposure was hidden for many years by Soviet authorities and has only come to light since the test site closed in 1991. The site has been described as The worlds worst radiation hotspot, from 1996 to 2012, a secret joint operation of Kazakh, Russian, and American nuclear scientists and engineers secured the waste plutonium in the tunnels of the mountains. The site was selected in 1947 by Lavrentiy Beria, political head of the Soviet atomic bomb project, gulag labour was employed to build the primitive test facilities, including the laboratory complex in the northeast corner on the southern bank of the Irtysh River. The first Soviet bomb test, Operation First Lightning was conducted in 1949 from a tower at the Semipalatinsk Test Site, the same area was used for more than 100 subsequent above-ground weapons tests. Later tests were moved to the Chagan River complex and nearby Balapan in the east of the STS, after the closure of the Semipalatinsk labour camp, construction duties were performed by the 217th Separate Engineering and Mining Battalion. Between 1949 and the cessation of atomic testing in 1989,456 explosions were conducted at the STS, the lab complex, still the administrative and scientific centre of the STS, was renamed Kurchatov City after Igor Kurchatov, leader of the initial Soviet nuclear programme. The location of Kurchatov city has been shown on various maps as Konechnaya or Moldary. The Semipalatinsk Complex was of acute interest to foreign governments during its operation, several U-2 overflights examined preparations and weapons effects, before being replaced with satellite reconnaissance. The US Defense Intelligence Agency is said to have been convinced that the Soviets had constructed an enormous beam weapon station at a research station located on the testing site. This smaller research station, known to the Department of Defense as PNUTS, after the fall of the Soviet Union in 1991, it was discovered that the mysterious URDF-3 was tasked with researching a nuclear thermal rocket similar to the USs NERVA. The site was closed by the President of Kazakhstan Nursultan Nazarbayev on 29 August 1991. The Soviet Union conducted its last tests in 1989, after the Soviet Union collapsed in 1991, the site was neglected. Unguarded fissile material was left behind in mountain tunnels and bore holes, virtually unguarded and vulnerable to scavengers, rogue states, after some of the tests, radioactive material remained on the now abandoned area, including significant amounts of plutonium. The risk that material might fall into the hands of scavengers or terrorists was considered one of the largest nuclear security threats since the collapse of the Soviet Union. The operation to address the problem involved, in part, pouring concrete into test holes. In other cases, horizontal mine test holes were sealed and the entrances covered over, the anti-nuclear movement in Kazakhstan, Nevada Semipalatinsk, was formed in 1989 and was one of the first major anti-nuclear movements in the former Soviet Union
11.
Kazakh Soviet Socialist Republic
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It was created on December 5,1936 from the Kazakh ASSR, an autonomous republic of the Russian SFSR. At 2,717,300 square kilometres in area, it was the second largest republic in the USSR, today it is the independent state of Kazakhstan in Central Asia. During its existence as a Soviet republic it was led by the Communist Party of the Kazakh SSR, on October 25,1990, the Supreme Soviet of the Kazakh SSR declared its sovereignty on its soil. Nursultan Nazarbayev was elected as president – a role he has remained in to this day, the Soviet republic was renamed the Republic of Kazakhstan on December 10,1991, which declared its independence six days later, on December 16,1991. The Soviet Union was disbanded on December 26,1991 by the Soviet of Nationalities, the Republic of Kazakhstan, the legal successor to the Kazakh SSR, was admitted to the United Nations on March 2,1992. The country is named after the Kazakh people, Turkic-speaking former nomads who sustained a powerful khanate in the region before Russian and then Soviet domination. The Soviet Unions spaceport, now known as the Baikonur Cosmodrome, was located in this republic at Tyuratam, established on August 26,1920, it was initially called Kirghiz ASSR and was a part of the Russian SFSR. On April 15–19,1925, it was renamed Kazak ASSR and on December 5,1936 it was elevated to the status of a Union-level republic, Kazakh Soviet Socialist Republic. Between 1932 and 1933, a famine struck Kazakhstan, killing 1.5 million people during the catastrophe of whom 1.3 million were ethnic Kazakhs, during the 1950s and 1960s Soviet citizens were urged to settle in the Virgin Lands of the Kazakh Soviet Socialist Republic. The influx of immigrants, mostly Russians, skewed the ethnic mixture, independence has caused many of these newcomers to emigrate. Only 168-200 civilians were killed or executed, the events were then spilled over to Shymkent, Pavlodar, Karaganda and Taldykorgan. On March 25,1990, Kazakhstan held its first elections with Nursultan Nazarbayev, later that year on October 25, it then declared sovereignty. The republic participated in a referendum to preserve the union in a different entity with 94. 1% voted in favor and it did not happened when hardline communists in Moscow took control of the government in August. Nazarbayev then condemned the failed coup, as a result of those events, the Kazakh SSR was renamed to the Republic of Kazakhstan on December 10,1991. It became independent on December 16, becoming the last republic to secede and its capital was the site of the Alma-Ata Protocol on December 21,1991 that dissolved the Soviet Union and formed the Commonwealth of Independent States in its place which Kazakhstan joined. The Soviet Union officially ceased to exist as a state on December 26,1991. On January 28,1993, the new Constitution of Kazakhstan was officially adopted, according to the 1897 census, the earliest census taken in the region, Kazakhs constituted 81. 7% of the total population within the territory of contemporary Kazakhstan. The Russian population in Kazakhstan was 454,402, or 10, table, Ethnic Composition of Kazakhstan One of the greatest factors that shaped the ethnic composition of Kazakhstan was 1920s and 1930s famines
12.
Soviet atomic bomb project
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The project was directed by Soviet nuclear physicist Igor Kurchatov, while the military logistics and intelligence efforts were undertaken and managed by NKVD peoples commissar Lavrentiy Beria. The Soviet Union benefited from highly successful efforts on the part of the GRU of the Soviet General Staff. However, because of the bloody and intensified war with Nazi Germany, the Soviets accelerated the program after the American atomic bombings of Hiroshima and Nagasaki. The Soviet atomic project was charged with gathering intelligence on the German nuclear energy project as well as the American nuclear efforts, after the war, the Soviet Union expanded its research facilities, military reactors, and employed many scientists. With the success of this test, the Soviet Union became the nation after the United States to detonate a nuclear device. In early 1930s, the Soviets were instrumental to the advancement of nuclear physics, the Soviet interest in nuclear physics had begun in the early 1930s, an era in which a variety of important nuclear discoveries and achievements were made. Even before the Russian revolution and the February Revolution, the mineralogist Vladimir Vernadsky had made a number of calls for a survey of Russias uranium deposits. The main motivation for research at the time was radium, which had scientific as well as medical uses. The soviet Atomic Bomb Project has its roots all the way back in the 1910s, the research being done was not officially institutionalized until 1922 when the Radium Institute in Petrograd opened. Through the thirties there were other institutions opened across the nation. It is important to acknowledge that the research and institutions were all a part of civil society and this meant that the military did not directly control the progress being made. In 1940, a commission was set up to address the Uranium Problem allowing intelligentsia to study nuclear fission, although significant ground had been broke the majority of research would be abandoned during World War II. Russia would spend the four years in conflict with Europe. Flyorov deduced that this meant such research had been classified, creation in 1943 of Laboratory No.2 under the Academy of Sciences of the USSR was the first stage of the Soviet atomic bomb project. When the United States tested the Atom Bomb in 1945 Stalin decided to push the intellectuals even harder and they appointed a special committee that was fully funded. This committee was headed by Beria who was now in charge of a group of specialists in science. Again it is important to note that Stalin did not include military men. Instead he put those from the party, civilians, and secret police in charge, on April 9,1946, the Council of Ministers of the USSR adopted the resolution on creation of Design Office#11 to develop an atomic bomb
13.
Kurchatov Institute
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The Kurchatov Institute is Russias leading research and development institution in the field of nuclear energy. In the Soviet Union it was known as I. V. Kurchatov Institute of Atomic Energy, the Kurchatov Institute is located at 1 Kurchatov Square, Moscow. It is named after Igor Kurchatov, until 1955 known under a secret name Laboratory No.2 of the USSR Academy of Sciences, the Kurchatov Institute was founded in 1943 with the initial purpose of developing nuclear weapons. The majority of Soviet nuclear reactors were designed in the Institute, including the on-site F-1, since 1955 it was also the host for major scientific experimental work in the fields of thermonuclear fusion and plasma physics. In particular, the first tokamak systems were developed there, the most successful of them being T-3, T-4 was tested in 1968 in Novosibirsk, conducting the first quasistationary thermonuclear fusion reaction ever. Until 1991, the Ministry of Atomic Energy oversaw the Kurchatov Institutes administration, after the transformation into the State Scientific Center in November 1991, the Institute became subordinated directly to the Russian Government. According to the Institutes Charter, the Institutes president is appointed by the minister based on recommendations from Rosatom. In February 2005 Mikhail Kovalchuk was appointed director of the institute, in February 2007 the Kurchatov Institute won the tender to be the main organization coordinating efforts in nanotechnology in Russia. IGNITOR Many reactors were designed by researchers of the institute, romashka reactor Kurchatov Institute Web Site
14.
Mayak
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The Mayak Production Association is one of the biggest nuclear facilities in the Russian Federation, housing plutonium production reactors and a reprocessing plant. The nuclear complex is located 150 km south-east of Ekaterinburg, between the towns of Kasli and Tatysh, and 72 km northwest of Chelyabinsk, the closest city, Ozyorsk, is the central administrative territorial district. As part of the Russian nuclear weapons program, Mayak was formerly known as Chelyabinsk-40 and later as Chelyabinsk-65, in 1957 Mayak was the site of the Kyshtym disaster, one of the worst nuclear accidents in history. During this catastrophe, a poorly maintained storage tank exploded, releasing 50-100 tons of radioactive waste. The resulting radioactive cloud contaminated an expansive territory of more than 750 km2 in the eastern Urals with the consequence of sickness, the Soviet regime kept this accident secret for about thirty years. The event was rated at 6 on the seven-level INES scale, third in severity only to the disasters at Chernobyl in Ukraine. Mayaks nuclear facility plant covers about 90 square kilometers, the site borders Ozyorsk, in which a majority of the staff of Mayak live. Mayak, itself, was not shown on Soviet public maps, the location of the site together with the plant city was chosen to minimize the effects that harmful emissions could potentially have on populated areas. Mayak is surrounded by a ~250 km2 exclusion zone, nearby is the site of the South Urals nuclear power plant. The Mayak plant was built between 1945–48, in a hurry and in total secrecy as part of the Soviet Unions atomic bomb project. Five nuclear reactors were built to make, refine, and machine plutonium for weapons, later the plant came to specialize in reprocessing spent nuclear fuel from nuclear reactors and plutonium from decommissioned weapons. Today the plant makes tritium and radioisotopes, not plutonium, in recent years, proposals that the plant reprocess waste from foreign nuclear reactors have given rise to controversy. Mayak continues to dump radioactive waste directly into the Techa River today. Medium level waste is discharged into the Karachay Lake, the tritium concentration, alone, in the Techa River near the village Muslyumovo exceeds the permissible limit by 30 times. Rosatom, a state-owned nuclear operations corporation, began to resettle residents of Muslyumovo in 2006, however, only half of the residents of the village were moved. People continue to live in the area of the plant, including Ozersk. Residents report no problems with their health and the health of Mayak plant workers, however, these claims lack hard verification, and many who worked at the plant in 1950s and 1960s subsequently died from the effects of radiation. Working conditions at Mayak resulted in severe health hazards and many accidents and this released 740 PBq of fission products, of which 74 PBq drifted off the site, creating a contaminated region of 15, 000-20,000 km2 called the East Urals Radioactive trace
15.
Trinity (nuclear test)
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Trinity was the code name of the first detonation of a nuclear weapon. It was conducted by the United States Army at 5,29 am on July 16,1945, the test was conducted in the Jornada del Muerto desert about 35 miles southeast of Socorro, New Mexico, on what was then the USAAF Alamogordo Bombing and Gunnery Range. The only structures originally in the vicinity were the McDonald Ranch House and its ancillary buildings, a base camp was constructed, and there were 425 people present on the weekend of the test. The code name Trinity was assigned by J. Robert Oppenheimer, the test was of an implosion-design plutonium device, informally nicknamed The Gadget, of the same design as the Fat Man bomb later detonated over Nagasaki, Japan, on August 9,1945. The complexity of the design required a major effort from the Los Alamos Laboratory, the test was planned and directed by Kenneth Bainbridge. Fears of a fizzle led to the construction of a containment vessel called Jumbo that could contain the plutonium, allowing it to be recovered. A rehearsal was held on May 7,1945, in which 108 short tons of high explosive spiked with radioactive isotopes were detonated, the Gadgets detonation released the explosive energy of about 22 kilotons of TNT. Observers included Vannevar Bush, James Chadwick, James Conant, Thomas Farrell, Enrico Fermi, Richard Feynman, Leslie Groves, Robert Oppenheimer, Geoffrey Taylor, and Richard Tolman. The test site was declared a National Historic Landmark district in 1965, the creation of nuclear weapons arose from scientific and political developments of the 1930s. The decade saw many new discoveries about the nature of atoms, the concurrent rise of fascist governments in Europe led to a fear of a German nuclear weapon project, especially among scientists who were refugees from Nazi Germany and other fascist countries. When their calculations showed that nuclear weapons were theoretically feasible, the British and these efforts were transferred to the authority of the U. S. Army in June 1942, and became the Manhattan Project. Brigadier General Leslie R. Groves, Jr. was appointed its director in September 1942, the weapons development portion of this project was located at the Los Alamos Laboratory in northern New Mexico, under the directorship of physicist J. Robert Oppenheimer. The University of Chicago, Columbia University and the Radiation Laboratory at the University of California, production of the fissile isotopes uranium-235 and plutonium-239 were enormous undertakings given the technology of the 1940s, and accounted for 80% of the total costs of the project. Uranium enrichment was carried out at the Clinton Engineer Works near Oak Ridge, theoretically, enriching uranium was feasible through pre-existing techniques, but it proved difficult to scale to industrial levels and was extremely costly. Only 0.71 percent of natural uranium was uranium-235, and it was estimated that it would take 27,000 years to produce a gram of uranium with mass spectrometers, plutonium is a synthetic element with complicated physical, chemical and metallurgical properties. It is not found in nature in appreciable quantities, until mid-1944, the only plutonium that had been isolated had been produced in cyclotrons in microgram amounts, whereas weapons required kilograms. In April 1944, physicist Emilio Segrè, the head of the Los Alamos Laboratorys P-5 Group and he discovered that, in addition to the plutonium-239 isotope, it also contained significant amounts of plutonium-240. The Manhattan Project produced plutonium in nuclear reactors at the Hanford Engineer Works near Hanford and this meant that the Thin Man bomb design that the laboratory had developed would not work properly
16.
Lavrentiy Beria
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Beria was the longest-lived and most influential of Stalins secret police chiefs, wielding his most substantial influence during and after World War II. Beria administered the vast expansion of the Gulag labor camps and was responsible for overseeing the secret defense institutions known as sharashkas. He also played the role in coordinating the Soviet partisans, developing an impressive intelligence. He attended the Yalta Conference with Stalin, who introduced him to U. S. President Franklin D. Roosevelt as our Himmler, after the war, he organized the communist takeover of the state institutions of Central and Eastern Europe. Berias uncompromising ruthlessness in his duties and skill at producing results culminated in his success in overseeing the Soviet atomic bomb project. Stalin gave it priority and the project was completed in under five years in no small part due to Soviet espionage against the West organized by Berias NKVD. Upon Stalins death in March 1953, Beria was promoted to First Deputy Premier and he was briefly a part of the ruling troika with Georgy Malenkov and Vyacheslav Molotov. Berias overconfidence in his position after Stalins death led him to misjudge other Politburo members, the compliance of the NKVD was ensured by Zhukovs troops, and after interrogation Beria was taken to the basement of the HQ of the Moscow Military District and shot by General Pavel Batitsky. Beria was born in Merkheuli, near Sukhumi, in the Sukhumi district of Kutaisi Governorate and he was from the Mingrelian subethnic group of Georgians and grew up in a Georgian Orthodox family. Berias mother, Marta Jaqeli, was a religious, church-going woman, she was previously married and widowed before marrying Berias father, Pavel Khukhaevich Beria. He also had a brother, and a sister named Anna, in his autobiography, Lavrentiy Beria mentioned only his sister and his niece, implying that his brother either was dead or had no relationship with Beria after he left Merkheuli. Beria attended a school in Sukhumi, and joined the Bolsheviks in March 1917 while a student in the Baku Polytechnicum. As a student, Beria distinguished himself in mathematics and the sciences, the Polytechnicums curriculum concentrated on the petroleum industry. Beria also worked for the anti-Bolshevik Mussavatists in Baku, after the citys capture by the Red Army, Beria was saved from execution only because there was likely little arrangement time and Sergei Kirov had possibly intervened. While in prison, he formed a connection with Nina Gegechkori, his cellmates niece and she was 17, a trained scientist from an aristocratic family. In 1919, at the age of twenty, Beria started his career in state security when the security service of the Azerbaijan Democratic Republic hired him while still a student at the Polytechnicum, in 1920 or 1921, Beria joined the Cheka – the original Bolshevik secret police. At that time, a Bolshevik revolt took place in the Menshevik-controlled Democratic Republic of Georgia, the Cheka became heavily involved in the conflict, which resulted in the defeat of the Mensheviks and the formation of the Georgian SSR. By 1922, Beria was deputy head of the Georgian branch of Chekas successor, in 1924 he led the repression of a Georgian nationalist uprising, after which up to 10,000 people were executed
17.
Nuclear weapon design
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Nuclear weapon designs are physical, chemical, and engineering arrangements that cause the physics package of a nuclear weapon to detonate. There are three existing basic design types, in many existing designs, the explosive energy of deployed devices is derived primarily from nuclear fission, not fusion. Pure fission weapons were the first nuclear weapons built and have so far been the type ever used in warfare. Implosion, a mass of either material is surrounded by high explosives that compress the mass. The implosion method can use either uranium or plutonium as fuel, the gun method only uses uranium. Boosted fission weapons improve on the implosion design, the high pressure and temperature environment at the center of an exploding fission weapon compresses and heats a mixture of tritium and deuterium gas. The hydrogen fuses to form helium and free neutrons, boosting can more than double the weapons fission energy release. Staged thermonuclear weapons are essentially a chain of fusion-boosted fission weapons, the secondary stage is imploded by x-ray energy from the first stage, called the primary. This radiation implosion is much more effective than the high-explosive implosion of the primary, consequently, the secondary can be many times more powerful than the primary, without being bigger. The secondary can be designed to maximize fusion energy release, but in most designs fusion is employed only to drive or enhance fission, as it is in the primary. More stages could be added and conceptual designs incorporating up to seven have been produced, pure fusion weapons have not been invented. Such weapons, though, would produce far less radioactive fallout than current designs, pure fission weapons historically have been the first type to be built by a nation state. Most known innovations in nuclear weapon design originated in the United States, although some were developed independently by other states. In early news accounts, pure fission weapons were called atomic bombs or A-bombs, Weapons involving fusion were called hydrogen bombs or H-bombs, also a misnomer since their energy comes mostly from fission. Practitioners favored the terms nuclear and thermonuclear, respectively, the term thermonuclear refers to the high temperatures required to initiate fusion. It omits the equally important factor of radiation pressure, which was considered secret at the time the term became widespread, many nuclear weapon terms similarly obfuscate because of their origin in a classified environment. Nuclear fission separates or splits heavier atoms to form lighter atoms, Nuclear fusion combines together lighter atoms to form heavier atoms. In some ways, fission and fusion are opposite and complementary reactions, to understand how nuclear weapons are designed, it is useful to know the important similarities and differences between fission and fusion
18.
Nagasaki
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Nagasaki is the capital and the largest city of Nagasaki Prefecture on the island of Kyushu in Japan. Part of Nagasaki was home to a major Imperial Japanese Navy base during the First Sino-Japanese War, during World War II, the American atomic bombings of Hiroshima and Nagasaki made Nagasaki the second and, to date, last city in the world to experience a nuclear attack. As of 1 January 2009, the city has an population of 446,007. The total area is 406.35 km², a small fishing village set in a secluded harbor, Nagasaki had little historical significance until contact with Portuguese explorers in 1543. An early visitor was Fernão Mendes Pinto, who came on a Portuguese ship which landed nearby in Tanegashima and his followers who remained behind converted a number of daimyōs. The most notable among them was Ōmura Sumitada, the little harbor village quickly grew into a diverse port city, and Portuguese products imported through Nagasaki were assimilated into popular Japanese culture. The Portuguese also brought them many goods from China. Thus, for a period after 1580, the city of Nagasaki was a Jesuit colony, under their administrative. It was administered by the captain of the Portuguese black ship, the highest representative of the Portuguese Crown and it became a refuge for Christians escaping maltreatment in other regions of Japan. In 1587, however, Toyotomi Hideyoshis campaign to unify the country arrived in Kyūshū, however, the expulsion order went largely unenforced, and the fact remained that most of Nagasakis population remained openly practicing Catholic. In 1596, the Spanish ship San Felipe was wrecked off the coast of Shikoku, in response, Hideyoshi ordered the crucifixions of twenty-six Catholics in Nagasaki on February 5 of that year. Portuguese traders were not ostracized, however, and so the city continued to thrive, in 1602, Augustinian missionaries also arrived in Japan, and when Tokugawa Ieyasu took power in 1603, Catholicism was still tolerated. Many Catholic daimyōs had been allies at the Battle of Sekigahara. Once Osaka Castle had been taken and Toyotomi Hideyoshis offspring killed, though, in addition, the Dutch and English presence allowed trade without religious strings attached. Thus, in 1614, Catholicism was officially banned and all missionaries ordered to leave, most Catholic daimyo apostatized, and forced their subjects to do so, although a few would not renounce the religion and left the country for Macau, Luzon and Japantowns in Southeast Asia. A brutal campaign of persecution followed, with thousands of converts across Kyūshū and other parts of Japan killed, tortured, catholicisms last gasp as an open religion and the last major military action in Japan until the Meiji Restoration was the Shimabara Rebellion of 1637. Consequently, in Tokugawa society the word Shimabara solidified the connection between Christianity and disloyalty, constantly used again and again in Tokugawa propaganda, the Shimabara Rebellion also convinced many policy-makers that foreign influences were more trouble than they were worth, leading to the national isolation policy. The Great Fire of Nagasaki destroyed much of the city in 1663, including the Mazu shrine at the Kofukuji Temple patronized by the Chinese sailors, in 1720 the ban on Dutch books was lifted, causing hundreds of scholars to flood into Nagasaki to study European science and art
19.
Plutonium
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Plutonium is a transuranic radioactive chemical element with symbol Pu and atomic number 94. It is a metal of silvery-gray appearance that tarnishes when exposed to air. The element normally exhibits six allotropes and four oxidation states and it reacts with carbon, halogens, nitrogen, silicon and hydrogen. When exposed to moist air, it forms oxides and hydrides that can expand the sample up to 70% in volume and it is radioactive and can accumulate in bones, which makes the handling of plutonium dangerous. Plutonium was first produced and isolated on December 14,1940 by Dr. Glenn T. Seaborg, Joseph W. Kennedy, Edwin M. McMillan, wahl by deuteron bombardment of uranium-238 in the 60-inch cyclotron at the University of California, Berkeley. They first synthesized neptunium-238 which subsequently beta-decayed to form a new element with atomic number 94. Uranium had been named after the planet Uranus and neptunium after the planet Neptune, and so element 94 was named after Pluto, wartime secrecy prevented them from announcing the discovery until 1948. Plutonium is the heaviest element to occur in nature as trace quantities arising similarly from the capture of natural uranium-238. Both plutonium-239 and plutonium-241 are fissile, meaning that they can sustain a chain reaction, leading to applications in nuclear weapons. Plutonium-240 exhibits a high rate of fission, raising the neutron flux of any sample containing it. The presence of plutonium-240 limits a plutonium samples usability for weapons or its quality as reactor fuel, plutonium-238 has a half-life of 88 years and emits alpha particles. It is a source in radioisotope thermoelectric generators, which are used to power some spacecraft. Plutonium isotopes are expensive and inconvenient to separate, so particular isotopes are usually manufactured in specialized reactors, producing plutonium in useful quantities for the first time was a major part of the Manhattan Project during World War II that developed the first atomic bombs. The Fat Man bombs used in the Trinity nuclear test in July 1945, Human radiation experiments studying plutonium were conducted without informed consent, and several criticality accidents, some lethal, occurred after the war. Disposal of plutonium waste from power plants and dismantled nuclear weapons built during the Cold War is a nuclear-proliferation. Other sources of plutonium in the environment are fallout from numerous above-ground nuclear tests, Plutonium, like most metals, has a bright silvery appearance at first, much like nickel, but it oxidizes very quickly to a dull gray, although yellow and olive green are also reported. At room temperature plutonium is in its α form and this, the most common structural form of the element, is about as hard and brittle as gray cast iron unless it is alloyed with other metals to make it soft and ductile. Unlike most metals, it is not a conductor of heat or electricity
20.
Atomic spies
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Their work constitutes the most publicly well-known and well-documented case of nuclear espionage in the history of nuclear weapons. There was a movement among nuclear scientists to share the information with the scientific community. Confirmation about espionage work came from the Venona project, which intercepted and decrypted Soviet intelligence reports sent during and they provided clues to the identity of several spies at Los Alamos and elsewhere, some of whom have never been identified. Some of this information was available but not usable in court for secrecy reasons during the 1950s trials, additionally, records from Soviet archives, which were briefly opened to researchers after the fall of the Soviet Union, included more information about some spies. Before World War II, the possibility of nuclear fission occasioned intense discussion among leading physicists world-wide. Scientists from the Soviet Union were later recognized for their contributions to the understanding of a nuclear reality, Soviet scientists such as Igor Kurchatov, L. D. Landau, and Kirill Sinelnikov helped establish the idea of, and prove the existence of, a splittable atom. Dwarfed by and lost in the scale of the Manhattan Project, in recorded comments, the physicists themselves lamented over their inability to achieve any kind of practical application from the discoveries. This would show that the thought the creation of an atomic weapon was a pipe-dream. The undertaking would be of a scale, and the resources required to engineer for such use as a nuclear bomb. Those skilled workers included the people to maintain and operate the necessary for research. The largest Western facility had five hundred scientists working on the project, the fledgling equivalent Soviet program was quite different, the program consisted of fifty scientists, and a mere two mathematicians trying to work out the equations for the particle cascade. The research and development of techniques to produce enriched uranium and plutonium were beyond the scope. The United States and Great Britain dedicated their best scientists to this cause, the Allied program decided to use gas-phase extraction to obtain the pure uranium necessary for an atomic detonation. Using this method, it took large quantities of uranium ore, the quantities required for the development were also beyond the scope and purview of the Soviet program. The Soviet Union did not have natural uranium-ore mines at the start of the arms race. A lack of materials made it difficult to conduct novel research or to map out a clear pathway to achieving the fuel they needed. The Soviet scientists became frustrated with the difficulties of producing uranium fuel cheaply, the use of information stolen from the Manhattan Project eventually rectified the problem. Without such information, the problems the Soviet atomic team experienced would have many years to correct
21.
World War II
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World War II, also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. It involved the vast majority of the worlds countries—including all of the great powers—eventually forming two opposing alliances, the Allies and the Axis. It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries. Marked by mass deaths of civilians, including the Holocaust and the bombing of industrial and population centres. These made World War II the deadliest conflict in human history, from late 1939 to early 1941, in a series of campaigns and treaties, Germany conquered or controlled much of continental Europe, and formed the Axis alliance with Italy and Japan. Under the Molotov–Ribbentrop Pact of August 1939, Germany and the Soviet Union partitioned and annexed territories of their European neighbours, Poland, Finland, Romania and the Baltic states. In December 1941, Japan attacked the United States and European colonies in the Pacific Ocean, and quickly conquered much of the Western Pacific. The Axis advance halted in 1942 when Japan lost the critical Battle of Midway, near Hawaii, in 1944, the Western Allies invaded German-occupied France, while the Soviet Union regained all of its territorial losses and invaded Germany and its allies. During 1944 and 1945 the Japanese suffered major reverses in mainland Asia in South Central China and Burma, while the Allies crippled the Japanese Navy, thus ended the war in Asia, cementing the total victory of the Allies. World War II altered the political alignment and social structure of the world, the United Nations was established to foster international co-operation and prevent future conflicts. The victorious great powers—the United States, the Soviet Union, China, the United Kingdom, the Soviet Union and the United States emerged as rival superpowers, setting the stage for the Cold War, which lasted for the next 46 years. Meanwhile, the influence of European great powers waned, while the decolonisation of Asia, most countries whose industries had been damaged moved towards economic recovery. Political integration, especially in Europe, emerged as an effort to end pre-war enmities, the start of the war in Europe is generally held to be 1 September 1939, beginning with the German invasion of Poland, Britain and France declared war on Germany two days later. The dates for the beginning of war in the Pacific include the start of the Second Sino-Japanese War on 7 July 1937, or even the Japanese invasion of Manchuria on 19 September 1931. Others follow the British historian A. J. P. Taylor, who held that the Sino-Japanese War and war in Europe and its colonies occurred simultaneously and this article uses the conventional dating. Other starting dates sometimes used for World War II include the Italian invasion of Abyssinia on 3 October 1935. The British historian Antony Beevor views the beginning of World War II as the Battles of Khalkhin Gol fought between Japan and the forces of Mongolia and the Soviet Union from May to September 1939, the exact date of the wars end is also not universally agreed upon. It was generally accepted at the time that the war ended with the armistice of 14 August 1945, rather than the formal surrender of Japan
22.
Rapid transit
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Rapid transit, also known as heavy rail, metro, subway, tube, or underground, is a type of high-capacity public transport generally found in urban areas. The stations typically have high platforms, without steps inside the trains and they are typically integrated with other public transport and often operated by the same public transport authorities. However, some transit systems have at-grade intersections between a rapid transit line and a road or between two rapid transit lines. It is unchallenged in its ability to transport large numbers of people quickly over short distances with little use of land, variations of rapid transit include people movers, small-scale light metro, and the commuter rail hybrid S-Bahn. The worlds first rapid-transit system was the partially underground Metropolitan Railway which opened as a railway in 1863. In 1868, New York opened the elevated West Side and Yonkers Patent Railway, china has the largest number of rapid transit systems in the world. The worlds longest single-operator rapid transit system by length is the Shanghai Metro. The worlds largest single rapid transit service provider by both length of revenue track (665 miles and number of stations is the New York City Subway. The busiest rapid transit systems in the world by annual ridership are the Tokyo subway system, the Seoul Metropolitan Subway, the Moscow Metro, the Beijing Subway, Metro is the most common term for underground rapid transit systems used by non-native English speakers. One of these terms may apply to a system, even if a large part of the network runs at ground level. In Scotland, however, the Glasgow Subway underground rapid transit system is known as the Subway, in the US, underground mass transit systems are primarily known as subways, whereas the term metro is a shortened reference to a metropolitan area. In that vein, Chicagos commuter rail system, serving the area, is called Metra. Exceptions in naming rapid transit systems are Washington DCs subway system the Washington Metro, Los Angeles Metro Rail, and the Miami Metrorail, the opening of Londons steam-hauled Metropolitan Railway in 1863 marked the beginning of rapid transit. Initial experiences with steam engines, despite ventilation, were unpleasant, experiments with pneumatic railways failed in their extended adoption by cities. Electric traction was more efficient, faster and cleaner than steam, in 1890 the City & South London Railway was the first electric-traction rapid transit railway, which was also fully underground. Both railways were merged into London Underground. The 1893 Liverpool Overhead Railway was designed to use electric traction from the outset, budapest in Hungary and Glasgow, Chicago and New York all converted or purpose-designed and built electric rail services. Advancements in technology have allowed new automated services, hybrid solutions have also evolved, such as tram-train and premetro, which incorporate some of the features of rapid transit systems
23.
Backronym
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A backronym or bacronym is a specially constructed phrase that is supposed to be the source of a word that is, or is claimed to be, an acronym. Backronyms may be invented with serious or humorous intent, or may be a type of false or folk etymology, the word is a combination of backward and acronym, and has been defined as a reverse acronym. Its earliest known citation in print is as bacronym in the November 1983 edition of the Washington Post monthly neologism contest. The newspaper quoted winning reader Meredith G. Williams of Potomac, Maryland, defining it as the same as an acronym, except that the words were chosen to fit the letters. An acronym is a derived from the initial letters of the words of a phrase, For example. By contrast, a backronym is constructed by creating a new phrase to fit an existing word, name. Backronyms are also used for comedic effect, as exemplified by NASAs C. O. L. B. E. R. T. NASA named its ISS treadmill the Combined Operational Load-Bearing External Resistance Treadmill after Stephen Colbert, the backronym was a lighthearted compromise in recognition of the comedians ability to sway NASAs online vote for the naming of an ISS module. Backronyms can be constructed for educational purposes, for example to form mnemonics, an example of such a mnemonic is the Apgar score, used to assess the health of newborn babies. Alcoholics Anonymous and other 12-step programs use backronyms as teaching tools, similar to such as one day at a time, or Let go, let God. For example, a slip may be expanded as Sobriety Losing Its Priority, backronyms are also created as jokes or as slogans, often expressing consumer loyalties or frustration. For example, the name of the restaurant chain Arbys is a play on the letters RB, referring to the companys founders, an advertising campaign in the 1980s created a backronym with the slogan America’s Roast Beef, Yes Sir. Many companies or products have spawned multiple humorous backronyms, with positive connotations asserted by supporters or negative ones by detractors. For example, the car company Ford was said to stand for First On Race Day, by aficionados, similar backronyms have been directed against many other automakers, such as Fix It Again Tony for Fiat. Backronyms have also coined by military personnel during wartime. The backronym for Spam, Something Posing As Meat, was said to have originated from jaundiced soldiers who were sick of eating canned meat. The British contribution to the 2003 invasion of Iraq was code-named Operation Telic, backronyms are sometimes created to name laws or programs. Commentators have noted a trend among US lawmakers to devise names that form a desired acronym
24.
Mikhail Pervukhin
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Mikhail Georgievich Pervukhin was a Soviet official during the Stalin Era, Khrushchev Era and the early Brezhnev Era. He served as a First Deputy Chairman of the Council of Ministers, literally First Vice-Premier of the Soviet Union and he was born on 14 October 1904 in the village of Yuryuzansky Zavod, Ufa governorate, Russian Empire to a Russian working-class family. Pervukhin became a member of the Russian Communist Party in 1919, in August to September 1919 Pervukhin was a member of the Zlatoust city commission on the nationalisation of property belonging to the bourgeoisie. He began working for the Zlatoust newspaper Borba in October 1919 and he fought alongside the Bolsheviks in the Russian Civil War in the South Urals. From October to November 1920 Pervukhin was a member of the Bolshevik squad quelling the uprising in Chrysostom. From January 1921 to mid-autumn Pervukhin worked as the Executive Secretary of the Proletarian Thought and he was a member of the Bureau of the Zlatoust Komsomol District Committee, and later became the head of its Department for Political Education in April 1922. Later that year he became the Zlatoust Komsomol District Committees Deputy Secretary, the Metal Workers Union of the Zlatoust District Committee ordered Pervukhin to Moscow in the late summer of 1922 to study. He graduated in 1929 from the Electrical Department of the Moscow Institute of the National Economy with a degree in electrical engineering, following his graduation, Pervukhin started work at Mosenergo, the Moscow electric power company. In May 1936 he became the Director of the Kashirskaya Power Plant, from June to September 1937, Pervukhin worked as Mosenergos Chief Engineer, and later that year became its acting head. During the Great Purge Pervukhin was promoted to Deputy Head of the Moscow Electrical Power Administration Bureau, and then its head. From 1940 to 1942, during World War II, Pervukhin served as a Deputy Chairman of the Council of Peoples Commissars, Pervukhin, alongside Boris Vannikov, was Vyacheslav Molotovs deputy on the State Defense Committees commission responsible for the development of the Soviet atomic bomb since 1943. Along with Molotov, Pervukhin was in charge of the uranium project. When Joseph Stalin signed the State Defense Committee Resolution No,9887, he established a Special Committee with emergency powers. The Committees main duty was to oversee the work of those who contributed to the development of the atomic bomb, Stalin personally picked the members of the committee, Pervukhin was one of nine members. Pervukhin was the Deputy Chairman under Vannikovs Chairmanship of the First Main Directorate of the Council of Peoples Commissars and he also served as Chairman of the State Commission on the RDS-1 testing at the Semipalatinsk nuclear test site. In 1950 Pervuhkin was once again appointed Deputy Chairman of the Council of Ministers and in 1952, at the 19th Party Congress, he was elected a member of the Presidium, the renamed Politburo. At the 35th anniversary of the October Revolution in 1952, Pervukhin delivered the speech at the Moscow Kremlin commemoration. If Stalin was absent or could not carry out his duty as Chairman of the Council of Ministers, government meetings would be chaired, in turn by Pervukhin, Lavrentiy Beria, or Maksim Saburov
25.
United States Air Force
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The United States Air Force is the aerial warfare service branch of the United States Armed Forces and one of the seven American uniformed services. Initially part of the United States Army, the USAF was formed as a branch of the military on 18 September 1947 under the National Security Act of 1947. It is the most recent branch of the U. S. military to be formed, the U. S. Air Force is a military service organized within the Department of the Air Force, one of the three military departments of the Department of Defense. The Air Force is headed by the civilian Secretary of the Air Force, who reports to the Secretary of Defense, the U. S. Air Force provides air support for surface forces and aids in the recovery of troops in the field. As of 2015, the service more than 5,137 military aircraft,406 ICBMs and 63 military satellites. It has a $161 billion budget with 313,242 active duty personnel,141,197 civilian employees,69,200 Air Force Reserve personnel, and 105,500 Air National Guard personnel. According to the National Security Act of 1947, which created the USAF and it shall be organized, trained, and equipped primarily for prompt and sustained offensive and defensive air operations. The stated mission of the USAF today is to fly, fight, and win in air, space and we will provide compelling air, space, and cyber capabilities for use by the combatant commanders. We will excel as stewards of all Air Force resources in service to the American people, while providing precise and reliable Global Vigilance, Reach and it should be emphasized that the core functions, by themselves, are not doctrinal constructs. The purpose of Nuclear Deterrence Operations is to operate, maintain, in the event deterrence fails, the US should be able to appropriately respond with nuclear options. Dissuading others from acquiring or proliferating WMD, and the means to deliver them, moreover, different deterrence strategies are required to deter various adversaries, whether they are a nation state, or non-state/transnational actor. Nuclear strike is the ability of forces to rapidly and accurately strike targets which the enemy holds dear in a devastating manner. Should deterrence fail, the President may authorize a precise, tailored response to terminate the conflict at the lowest possible level, post-conflict, regeneration of a credible nuclear deterrent capability will deter further aggression. Finally, the Air Force regularly exercises and evaluates all aspects of operations to ensure high levels of performance. Nuclear surety ensures the safety, security and effectiveness of nuclear operations, the Air Force, in conjunction with other entities within the Departments of Defense or Energy, achieves a high standard of protection through a stringent nuclear surety program. The Air Force continues to pursue safe, secure and effective nuclear weapons consistent with operational requirements, adversaries, allies, and the American people must be highly confident of the Air Forces ability to secure nuclear weapons from accidents, theft, loss, and accidental or unauthorized use. This day-to-day commitment to precise and reliable nuclear operations is the cornerstone of the credibility of the NDO mission, positive nuclear command, control, communications, effective nuclear weapons security, and robust combat support are essential to the overall NDO function. OCA is the method of countering air and missile threats, since it attempts to defeat the enemy closer to its source
26.
Misawa Air Base
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Misawa Air Base is a U. S. It is a Pacific Air Forces facility with the 35th Fighter Wing as its host wing, Misawa is the only combined, joint service installation in the western Pacific. It houses three U. S. military services (Air Force, Navy and Army, as well as the Japan Air Self-Defense Force, the base is home to 5,200 US military personnel, as well as 350 US civilian employees and 900 Japanese national employees. The Misawa Passive Radio Frequency space surveillance site was used for tracking satellites using the signals they transmit and it also provided coverage of geosynchronous satellites using the Deep Space Tracking System but was dismantled around 2002. The Misawa Security Operations Center, located in the part of the Air Base, is believed to be one of the largest ECHELON ground stations. The United States Air Forces 35th Fighter Wing is the host unit at Misawa Air Base, the wing conducts daily F-16 flight training to maintain its combat readiness. Its pilots fly air-to-air weapons delivery exercises over water and sharpen their skills using the Draughn Gunnery Range located 12 miles north of Misawa. Five groups are assigned to the 35th Fighter Wing, the 35th Maintenance Group, the 35th Fighter Wing also serves as the host unit to a variety of other tenant units representing three U. S. military services and those of the Japan Air Self-Defense Force. Air Force 373d Intelligence, Surveillance and Reconnaissance Group 301st Intelligence Squadron 373rd Mission Support Squadron U. S. S, Misawa remained a training center for Japanese Cavalry until the Japanese Army constructed the first runway at Misawa for military aircraft in 1938. Misawa Air Base was near the site of the worlds first non-stop trans-Pacific flight in 1931. The runway is commemorated by a sign in the coastal forest and is a popular beach. The cities of Wenatchee and Misawa cemented their relationship by becoming official sister cities in 1981. The Imperial Army transformed Misawa into an air base in 1938 when it was used as a base for long-range bombers, by early 1941, the Gensan Flying Corps trained at Misawa. The base was taken over by the Imperial Navy Air Corps in 1942 when the 22d Imperial Naval Air Wg assumed control of the base, in 1944, facilities were built for Kamikaze Special Attack forces. Before the outbreak of World War II, Lake Ogawara at Misawa was used by the Imperial Japanese Navy Air Service to practice for the attack on Pearl Harbor, the lake was used because it was similar in depth to Pearl Harbor. The Japanese military fashioned hills near the shore of the lake to resemble the shapes of Battleships and this provided for a realistic view for their pilots from the air. The pilots conducted low level bombing runs, dropping torpedoes into the depths of Lake Ogawara. This practice developed and refined the method to attack the ships that were anchored at Pearl Harbor, during World War II, the Misawa area was heavily damaged by U. S. fighters and bombers
27.
Eielson Air Force Base
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Eielson Air Force Base is a United States Air Force base located approximately 26 miles southeast of Fairbanks, Alaska and just southeast of Moose Creek, Alaska. It was established in 1943 as Mile 26 Satellite Field and taken off deployment in 2007 and it has been a Superfund site since 1989. Its host unit is the 354th Fighter Wing assigned to the Eleventh Air Force of the Pacific Air Forces, Eielson AFB was named in honor of polar pilot Carl Ben Eielson. The 354 FW is currently commanded by Colonel David A. Mineau, until 2007, Eielson was a front line base, deploying fighter and bomber units around the world and providing for the defense of Alaska. Because of BRAC2005 the base went off deployment status in 2007 and these exercises are conducted on the Joint Pacific Alaskan Range complex with air operations flown out of the two bases. Alaskas size enables the military to have the largest air-ground training complex in America, Eielson is home to the 354th Fighter Wing which is part of the Eleventh Air Force of Pacific Air Forces. The 354th Fighter Wing mission is To train, deliver, maintain and support combat power across the globe while taking care of our people, their families and our infrastructure. To accomplish that mission, the wing implements flying operations, mission support, maintenance,460, Air Force Technical Applications Center Arctic Survival School, Det. 632, Air Force Office of Special Investigations Det,1, 210th Rescue Squadron On 7 June 1943, the Western Defense Command ordered construction of a new airfield near present-day Fort Wainwright, then an Army airfield named after Major Arthur K. Ladd. The field became known as Mile 26 because of its proximity to a US Army Signal Corps telegraph station, a month later, contractors and civilian crews from Ladd Field started laying out the new airfield. Actual construction began on 25 August 1943, crews built two parallel runways,165 feet across and 6,625 feet long. Other facilities included a building, housing for 108 officer and 330 enlisted personnel. The garrison and airfield totaled about 600 acres, completed on 17 October 1944, the 14-month project cost about eight-million dollars. Operational uses of Mile 26 were few, Ladd Field served as the debarkation point for the Alaska-Siberia Ferry Route of the lend-lease program and was the hub of activity. Lend-lease aircraft would land at Mile 26, but there are no records to indicate any lend-lease aircraft ever used the airfield to take off for Russia. Mile 26 closed when the war ended, the base reopened in September 1946, once again as a satellite of Ladd Field. The first USAAF operational unit assigned to Eielson was the 57th Fighter Group, equipped successively with P-38 Lightnings, P/F-51 Mustangs, F-80 Shooting Stars, the 57th FG was inactivated on 13 April 1953. On 1 December 1947 Strategic Air Command B-29 Superfortress bombers arrived at Mile 26 Field with the deployment of the 97th Bombardment Wing, Very Heavy, from Smoky Hill AFB, Kansas
28.
Nuclear fission product
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Nuclear fission products are the atomic fragments left after a large atomic nucleus undergoes nuclear fission. Typically, a nucleus like that of uranium fissions by splitting into two smaller nuclei, along with a few neutrons, the release of heat energy. The two smaller nuclei are the fission products, about 0. 2% to 0. 4% of fissions are ternary fissions, producing a third light nucleus such as helium-4 or tritium. The fission products themselves are often unstable and radioactive, due to being relatively neutron-rich for their atomic number and this releases additional energy in the form of beta particles, antineutrinos, and gamma rays. Thus, fission events normally result in radiation and antineutrinos. Many of these nuclides have a very short half-life, and therefore are very radioactive, for instance, strontium-90, strontium-89 and strontium-94 are all fission products, they are produced in similar quantities, and each nucleus decays by shooting off one beta particle. But Sr-90 has a 30-year half-life, Sr-89 a 50. 5-day half-life, the same number of atoms of Sr-89 will decay 10,600 times faster than Sr-90, and Sr-94 will do so 915 million times faster. It is these short-half-life nuclides that make spent fuel so dangerous, in addition to generating much heat, immediately after the reactor itself has been shut down. The most radioactive also decay the fastest, after 50 days, Sr-94 has had 58,000 half-lives and is gone, Sr-89 is at half its original quantity. As there are hundreds of different nuclides created, the radioactivity level fades quickly. The sum of the mass of the two atoms produced by the fission of one fissile atom is always less than the atomic mass of the original atom. Since the nuclei that can undergo fission are particularly neutron-rich. The initial fission products therefore may be unstable and typically undergo beta decay to move towards a stable configuration, a few neutron-rich and short-lived initial fission products decay by ordinary beta decay, followed by immediate emission of a neutron by the excited daughter-product. This process is the source of so-called delayed neutrons, which play an important role in control of a nuclear reactor, the first beta decays are rapid and may release high energy beta particles or gamma radiation. However, as the fission products approach stable nuclear conditions, the last one or two decays may have a long half-life and release less energy. Fission products have half-lives of 90 years or less, except for seven long-lived fission products that have lives of 211,100 years. This behavior of pure fission products with actinides removed, contrasts with the decay of fuel that still contains actinides and this fuel is produced in the so-called open nuclear fuel cycle. A number of these actinides have half lives in the range of about 100 to 200,000 years
29.
Nuclear fallout
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It commonly refers to the radioactive dust and ash created when a nuclear weapon explodes, but such dust can also originate from a damaged nuclear plant. Fallout may get entrained with the products of a pyrocumulus cloud and this radioactive dust, usually consisting of fission products mixed with bystanding atoms that are neutron activated by exposure, is a highly dangerous kind of radioactive contamination. An air burst can eventually produce worldwide fallout, a ground burst can produce possibly much more severe, local fallout. These particles may be drawn up into the stratosphere, particularly if the explosive yield exceeds 10 kt. Initially little was known about the dispersion of nuclear fallout on a global scale, the AEC assumed that fallout would be dispersed evenly across the globe by atmospheric winds and gradually settle to the Earths surface after weeks, months, and even years as worldwide fallout. This hazard is less pertinent than local fallout, which is of much greater immediate operational concern, in a land or water surface burst, heat vaporizes large amounts of earth or water, which is drawn up into the radioactive cloud. This material becomes radioactive when it condenses with fission products and other radiocontaminants that have become neutron-activated, the table below summarizes the abilities of common isotopes to form fallout. Some radiation taints large amounts of land and drinking water causing formal mutations throughout animal and human life. The larger particles spill out of the stem and cascade down the outside of the fireball in a downdraft even as the cloud rises, more than half the total bomb debris lands on the ground within about 24 hours as local fallout. Chemical properties of the elements in the control the rate at which they are deposited on the ground. Severe local fallout contamination can extend far beyond the blast and thermal effects, the ground track of fallout from an explosion depends on the weather from the time of detonation onwards. In stronger winds, fallout travels faster but takes the time to descend, so although it covers a larger path. Thus, the width of the pattern for any given dose rate is reduced where the downwind distance is increased by higher winds. The total amount of activity deposited up to any time is the same irrespective of the wind pattern. But thunderstorms can bring down activity as rain more rapidly than dry fallout, particularly if the cloud is low enough to be below, or mixed with. There are two considerations for the location of an explosion, height and surface composition. A nuclear weapon detonated in the air, called an air burst, in case of water surface bursts, the particles tend to be rather lighter and smaller, producing less local fallout but extending over a greater area. The particles contain mostly sea salts with some water, these can have a cloud seeding effect causing local rainout and areas of high local fallout
30.
Harry S. Truman
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Harry S. Truman was an American politician who served as the 33rd President of the United States, assuming the office upon the death of Franklin D. Roosevelt during the waning months of World War II. In domestic affairs, he was a moderate Democrat whose liberal proposals were a continuation of Franklin Roosevelts New Deal, but the conservative-dominated Congress blocked most of them. He also used weapons to end World War II, desegregated the U. S. armed forces, supported a newly independent Israel. Truman was born in Lamar, Missouri, and spent most of his youth on his familys 600-acre farm near Independence, in the last months of World War I, he served in combat in France as an artillery officer with his National Guard unit. After the war, he owned a haberdashery in Kansas City, Missouri, and joined the Democratic Party. Truman was first elected to office as a county official in 1922. After serving as a United States Senator from Missouri and briefly as Vice President, he succeeded to the presidency on April 12,1945, upon the death of Franklin D. Roosevelt. Germany surrendered on Trumans 61st birthday, just a few weeks after he assumed the presidency, but the war with Imperial Japan raged on and was expected to last at least another year. Although this decision and the issues that arose as a result of it remain the subject of debate to this day. Truman presided over a surge in economic prosperity as America sought readjustment after long years of depression. His presidency was a point in foreign affairs, as the United States engaged in an internationalist foreign policy. Truman helped found the United Nations in 1945, issued the Truman Doctrine in 1947 to contain Communism and his political coalition was based on the white South, labor unions, farmers, ethnic groups, and traditional Democrats across the North. Truman was able to rally groups of supporters during the 1948 presidential election. The Soviet Union became an enemy in the Cold War, Truman oversaw the Berlin Airlift of 1948 and the creation of NATO in 1949, but was unable to stop Communists from taking over China. When communist North Korea invaded South Korea in 1950, he sent U. S. troops, after initial successes in Korea, however, the UN forces were thrown back by Chinese intervention, and the conflict was stalemated throughout the final years of Trumans presidency. Scholars, starting in 1962, ranked Trumans presidency as near great, Harry S. Truman was born on May 8,1884, in Lamar, Missouri, the oldest child of John Anderson Truman and Martha Ellen Young Truman. His parents chose the name Harry after his mothers brother, Harrison Harry Young, while the S did not stand for any one name, it was chosen as his middle initial to honor both of his grandfathers, Anderson Shipp Truman and Solomon Young. The initial has been written and printed followed by a period
31.
Boeing B-29 Superfortress variants
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The Boeing B-29 Superfortress was produced in a large number of experimental and production models. Two aircraft were ordered in August 1940, and a third was ordered in December, a mockup was completed in the spring of 1941, and it first flew on September 21,1942. Testing continued until February 18,1943, when the prototype crashed. Flown by Boeings chief test pilot, Edmund T, eddie Allen on a two-hour powerplant performance test, leaking fuel from a filler cap in the wing leading edge ran down inside the leading-edge and ignited, spreading to the engines. The crash killed many élite Boeing personnel involved in the design, the YB-29 was an improved XB-29 and 14 were built for service testing. Testing began in the summer of 1943, and dozens of modifications were made to the planes, the engines were upgraded from Wright R-3350-13s to R-3350-21s. Where the XB-29 had three-bladed props, the YB-29 had four-bladed propellers, various alternatives to the remote-controlled defensive systems were tested on a number of them, particularly the fourth one delivered. After alternative arrangements had been tested, defensive armament was standardised at ten. 50-calibre machine guns in turret-mounted pairs. The YB-29 also featured a fire control system. The B-29 was the production version of the Superfortress. Since the new bomber was urgently needed, the design was developed in tandem with the service testing. In fact, the first B-29 was completed two months after the delivery of the first YB-29. Forty-six B-29s of this variant, built by the Glenn L. Martin Company at its Omaha plant, were used as the aircraft for the atomic bomb missions, some 2,513 B-29s were manufactured by Boeing-Wichita, Bell-Atlanta, and Martin-Omaha. Section source, Baugher and The B-29A was a version of the original B-29 production model. All 1,119 B-29As were built at the Boeing plant in Renton, Washington, enhancements made in the B-29A included a better wing design and defensive modifications. Due to a weakness to head-on fighter attacks, the number of machine guns in the forward dorsal turrets was doubled to four. Where the wings of previous models had been made by the sub-assembly of two sections, the B-29A wing was built up from three and this made construction easier, and increased the strength of the airframe. The B-29A was produced until May 1946, when the last aircraft was completed and it was much used during the Korean War, but was quickly phased out when the jet bomber became operational
32.
Cold War
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The Cold War was a state of geopolitical tension after World War II between powers in the Eastern Bloc and powers in the Western Bloc. Historians do not fully agree on the dates, but a common timeframe is the period between 1947, the year the Truman Doctrine was announced, and 1991, the year the Soviet Union collapsed. The term cold is used there was no large-scale fighting directly between the two sides, although there were major regional wars, known as proxy wars, supported by the two sides. The Cold War split the temporary alliance against Nazi Germany, leaving the Soviet Union. The USSR was a Marxist–Leninist state ruled by its Communist Party and secret police, the Party controlled the press, the military, the economy and all organizations. In opposition stood the West, dominantly democratic and capitalist with a free press, a small neutral bloc arose with the Non-Aligned Movement, it sought good relations with both sides. The two superpowers never engaged directly in full-scale armed combat, but they were armed in preparation for a possible all-out nuclear world war. The first phase of the Cold War began in the first two years after the end of the Second World War in 1945, the Berlin Blockade was the first major crisis of the Cold War. With the victory of the communist side in the Chinese Civil War and the outbreak of the Korean War, the USSR and USA competed for influence in Latin America, and the decolonizing states of Africa and Asia. Meanwhile, the Hungarian Revolution of 1956 was stopped by the Soviets, the expansion and escalation sparked more crises, such as the Suez Crisis, the Berlin Crisis of 1961, and the Cuban Missile Crisis of 1962. The USSR crushed the 1968 Prague Spring liberalization program in Czechoslovakia, détente collapsed at the end of the decade with the beginning of the Soviet–Afghan War in 1979. The early 1980s were another period of elevated tension, with the Soviet downing of Korean Air Lines Flight 007, the United States increased diplomatic, military, and economic pressures on the Soviet Union, at a time when the communist state was already suffering from economic stagnation. In the mid-1980s, the new Soviet leader Mikhail Gorbachev introduced the reforms of perestroika and glasnost. Pressures for national independence grew stronger in Eastern Europe, especially Poland, Gorbachev meanwhile refused to use Soviet troops to bolster the faltering Warsaw Pact regimes as had occurred in the past. The result in 1989 was a wave of revolutions that peacefully overthrew all of the communist regimes of Central, the Communist Party of the Soviet Union itself lost control and was banned following an abortive coup attempt in August 1991. This in turn led to the dissolution of the USSR in December 1991. The United States remained as the only superpower. The Cold War and its events have left a significant legacy and it is often referred to in popular culture, especially in media featuring themes of espionage and the threat of nuclear warfare
33.
Thermonuclear weapon
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A thermonuclear weapon is a nuclear weapon that uses the energy from a primary nuclear fission reaction to compress and ignite a secondary nuclear fusion reaction. The result is greatly increased power when compared to single-stage fission weapons. It is colloquially referred to as a bomb or an H-bomb because it employs the fusion of isotopes of hydrogen. The first full scale thermonuclear test was carried out by the United States in 1952, similar devices were developed by the Soviet Union, United Kingdom, China, and France. The radiation implosion mechanism is an engine that exploits the temperature difference between the secondary stages hot, surrounding radiation channel and its relatively cool interior. This temperature difference is maintained by a massive heat barrier called the pusher. If made of uranium, as is almost always the case, it can capture neutrons produced by the reaction and undergo fission itself. In many Teller–Ulam weapons, fission of the pusher dominates the explosion, detailed knowledge of fission and fusion weapons is classified to some degree in virtually every industrialized nation. Born secret is rarely invoked for cases of private speculation, in a small number of prior cases, the U. S. government has attempted to censor weapons information in the public press, with limited success. According to the New York Times, physicist Kenneth Ford defied government orders to remove classified information from his new book, Building the H Bomb, the state of public knowledge about the Teller–Ulam design has been mostly shaped from a few specific incidents outlined in a section below. At a bare minimum, this implies a primary section consists of an implosion-type fission bomb. The energy released by the primary compresses the secondary through a process called radiation implosion, at which point it is heated, surrounding the other components is a hohlraum or radiation case, a container that traps the first stage or primarys energy inside temporarily. The outside of this case, which is also normally the outside casing of the bomb, is the only direct visual evidence publicly available of any thermonuclear bomb components configuration. Numerous photographs of various thermonuclear bomb exteriors have been declassified, generally, a research program with the capacity to create a thermonuclear bomb has already mastered the ability to engineer boosted fission. The secondary is usually shown as a column of fusion fuel, around the column is first a pusher-tamper, a heavy layer of uranium-238 or lead that serves to help compress the fusion fuel. Inside this is the fuel itself, usually a form of lithium deuteride. This dry fuel, when bombarded by neutrons, produces tritium, inside the layer of fuel is the spark plug, a hollow column of fissile material that, when compressed, can itself undergo nuclear fission. The tertiary, if one is present, would be set below the secondary, separating the secondary from the primary is the interstage
34.
Tsar Bomba
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Tsar Bomba was the Western nickname for the Soviet RDS-220 hydrogen bomb, the most powerful nuclear weapon ever detonated. Its test on October 30,1961 remains the most powerful human-made explosion in history and it was also referred to as Kuzkina mat, possibly referring to Nikita Khrushchevs promise to show the United States a Kuzkina mat at a 1960 session of United Nations General Assembly. Developed by the Soviet Union, the bomb had a yield of 57 megaton TNT, in theory, the bomb had a maximum yield of 100 megatons if it were to have included a U-238 tamper, but because only one bomb was built, this was never demonstrated. The single bomb was detonated at the Sukhoy Nos cape of Severny Island, the remaining bomb casings are located at the Russian Atomic Weapon Museum in Sarov and the Museum of Nuclear Weapons, All-Russian Research Institute of Technical Physics, at Snezhinsk. Many names are attributed to the Tsar Bomba, Project 7000, product code 202, article designations RDS-220, RDS-202, RN202, AN602, codename Vanya, nicknames Big Ivan, Kuzkina mat. The name Tsar Bomba was coined in an analogy with other massive Russian objects, the CIA designated the test as JOE111. The Tsar Bomba was a bomb with Trutnev-Babaev second and third stage design. There is evidence that the Tsar Bomba had several third stages rather than a very large one. To limit fallout, the stage and possibly the second stage had a lead tamper instead of a uranium-238 fusion tamper. This eliminated fast fission by the neutrons, so that approximately 97% of the total yield resulted from thermonuclear fusion alone. There was an incentive for this modification since most of the fallout from a test of the bomb would likely have ended up on populated Soviet territory. The components were designed by a team of physicists headed by academician Yulii Borisovich Khariton and including Andrei Sakharov, Victor Adamsky, Yuri Babayev, Yuri Smirnov, and Yuri Trutnev. Shortly after the Tsar Bomba was detonated, Sakharov began speaking out against nuclear weapons, the Tsar Bomba was flown to its test site by a specially modified Tu-95V release plane, flown by Major Andrei Durnovtsev. Taking off from an airfield in the Kola Peninsula, the plane was accompanied by a Tu-16 observer plane that took air samples. Both aircraft were painted with a reflective white paint to limit heat damage. Despite this effort, Durnovtsev and his crew were assigned only a 50% chance of surviving the test, the bomb, weighing 27 metric tons, was so large that the Tu-95V had to have its bomb bay doors and fuselage fuel tanks removed. The bomb was attached to an 800 kilogram parachute, which gave the release, when detonation occurred, the Tu-95V dropped one kilometer in the air because of the shock wave, but was able to land safely. The Tsar Bomba detonated at 11,32 Moscow Time on October 30,1961, over the Mityushikha Bay nuclear testing range, north of the Arctic Circle over the Novaya Zemlya archipelago in the Arctic Ocean
35.
International Standard Book Number
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The International Standard Book Number is a unique numeric commercial book identifier. An ISBN is assigned to each edition and variation of a book, for example, an e-book, a paperback and a hardcover edition of the same book would each have a different ISBN. The ISBN is 13 digits long if assigned on or after 1 January 2007, the method of assigning an ISBN is nation-based and varies from country to country, often depending on how large the publishing industry is within a country. The initial ISBN configuration of recognition was generated in 1967 based upon the 9-digit Standard Book Numbering created in 1966, the 10-digit ISBN format was developed by the International Organization for Standardization and was published in 1970 as international standard ISO2108. Occasionally, a book may appear without a printed ISBN if it is printed privately or the author does not follow the usual ISBN procedure, however, this can be rectified later. Another identifier, the International Standard Serial Number, identifies periodical publications such as magazines, the ISBN configuration of recognition was generated in 1967 in the United Kingdom by David Whitaker and in 1968 in the US by Emery Koltay. The 10-digit ISBN format was developed by the International Organization for Standardization and was published in 1970 as international standard ISO2108, the United Kingdom continued to use the 9-digit SBN code until 1974. The ISO on-line facility only refers back to 1978, an SBN may be converted to an ISBN by prefixing the digit 0. For example, the edition of Mr. J. G. Reeder Returns, published by Hodder in 1965, has SBN340013818 -340 indicating the publisher,01381 their serial number. This can be converted to ISBN 0-340-01381-8, the check digit does not need to be re-calculated, since 1 January 2007, ISBNs have contained 13 digits, a format that is compatible with Bookland European Article Number EAN-13s. An ISBN is assigned to each edition and variation of a book, for example, an ebook, a paperback, and a hardcover edition of the same book would each have a different ISBN. The ISBN is 13 digits long if assigned on or after 1 January 2007, a 13-digit ISBN can be separated into its parts, and when this is done it is customary to separate the parts with hyphens or spaces. Separating the parts of a 10-digit ISBN is also done with either hyphens or spaces, figuring out how to correctly separate a given ISBN number is complicated, because most of the parts do not use a fixed number of digits. ISBN issuance is country-specific, in that ISBNs are issued by the ISBN registration agency that is responsible for country or territory regardless of the publication language. Some ISBN registration agencies are based in national libraries or within ministries of culture, in other cases, the ISBN registration service is provided by organisations such as bibliographic data providers that are not government funded. In Canada, ISBNs are issued at no cost with the purpose of encouraging Canadian culture. In the United Kingdom, United States, and some countries, where the service is provided by non-government-funded organisations. Australia, ISBNs are issued by the library services agency Thorpe-Bowker
36.
International Standard Serial Number
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An International Standard Serial Number is an eight-digit serial number used to uniquely identify a serial publication. The ISSN is especially helpful in distinguishing between serials with the same title, ISSN are used in ordering, cataloging, interlibrary loans, and other practices in connection with serial literature. The ISSN system was first drafted as an International Organization for Standardization international standard in 1971, ISO subcommittee TC 46/SC9 is responsible for maintaining the standard. When a serial with the content is published in more than one media type. For example, many serials are published both in print and electronic media, the ISSN system refers to these types as print ISSN and electronic ISSN, respectively. The format of the ISSN is an eight digit code, divided by a hyphen into two four-digit numbers, as an integer number, it can be represented by the first seven digits. The last code digit, which may be 0-9 or an X, is a check digit. Formally, the form of the ISSN code can be expressed as follows, NNNN-NNNC where N is in the set, a digit character. The ISSN of the journal Hearing Research, for example, is 0378-5955, where the final 5 is the check digit, for calculations, an upper case X in the check digit position indicates a check digit of 10. To confirm the check digit, calculate the sum of all eight digits of the ISSN multiplied by its position in the number, the modulus 11 of the sum must be 0. There is an online ISSN checker that can validate an ISSN, ISSN codes are assigned by a network of ISSN National Centres, usually located at national libraries and coordinated by the ISSN International Centre based in Paris. The International Centre is an organization created in 1974 through an agreement between UNESCO and the French government. The International Centre maintains a database of all ISSNs assigned worldwide, at the end of 2016, the ISSN Register contained records for 1,943,572 items. ISSN and ISBN codes are similar in concept, where ISBNs are assigned to individual books, an ISBN might be assigned for particular issues of a serial, in addition to the ISSN code for the serial as a whole. An ISSN, unlike the ISBN code, is an identifier associated with a serial title. For this reason a new ISSN is assigned to a serial each time it undergoes a major title change, separate ISSNs are needed for serials in different media. Thus, the print and electronic versions of a serial need separate ISSNs. Also, a CD-ROM version and a web version of a serial require different ISSNs since two different media are involved, however, the same ISSN can be used for different file formats of the same online serial
37.
JSTOR
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JSTOR is a digital library founded in 1995. Originally containing digitized back issues of journals, it now also includes books and primary sources. It provides full-text searches of almost 2,000 journals, more than 8,000 institutions in more than 160 countries have access to JSTOR, most access is by subscription, but some older public domain content is freely available to anyone. William G. Bowen, president of Princeton University from 1972 to 1988, JSTOR originally was conceived as a solution to one of the problems faced by libraries, especially research and university libraries, due to the increasing number of academic journals in existence. Most libraries found it prohibitively expensive in terms of cost and space to maintain a collection of journals. By digitizing many journal titles, JSTOR allowed libraries to outsource the storage of journals with the confidence that they would remain available long-term, online access and full-text search ability improved access dramatically. Bowen initially considered using CD-ROMs for distribution, JSTOR was initiated in 1995 at seven different library sites, and originally encompassed ten economics and history journals. JSTOR access improved based on feedback from its sites. Special software was put in place to make pictures and graphs clear, with the success of this limited project, Bowen and Kevin Guthrie, then-president of JSTOR, wanted to expand the number of participating journals. They met with representatives of the Royal Society of London and an agreement was made to digitize the Philosophical Transactions of the Royal Society dating from its beginning in 1665, the work of adding these volumes to JSTOR was completed by December 2000. The Andrew W. Mellon Foundation funded JSTOR initially, until January 2009 JSTOR operated as an independent, self-sustaining nonprofit organization with offices in New York City and in Ann Arbor, Michigan. JSTOR content is provided by more than 900 publishers, the database contains more than 1,900 journal titles, in more than 50 disciplines. Each object is identified by an integer value, starting at 1. In addition to the site, the JSTOR labs group operates an open service that allows access to the contents of the archives for the purposes of corpus analysis at its Data for Research service. This site offers a facility with graphical indication of the article coverage. Users may create focused sets of articles and then request a dataset containing word and n-gram frequencies and they are notified when the dataset is ready and may download it in either XML or CSV formats. The service does not offer full-text, although academics may request that from JSTOR, JSTOR Plant Science is available in addition to the main site. The materials on JSTOR Plant Science are contributed through the Global Plants Initiative and are only to JSTOR
