|
Philip J. Dolan
Philip Jarvis Dolan (October 5, 1923 – January 5, 1992) was an American physicist. He graduated from West Point in 1945, was assigned to the Manhattan Project in Los Alamos in 1948, and received his MSc in physics from the University of Virginia in 1956. The son of a professor of military science at Purdue University, Dolan served in the Korean War before holding U.S. Army posts including instructor in nuclear weapons employment and nuclear effects project officer. He later worked for Lockheed Corporation and SRI International. He is best known as co-author with Samuel Glasstone of the reference work ''The Effects of Nuclear Weapons'', as well as first editor of the two-part edition of the U.S. Department of Defense's 1,651 page secret-restricted data manual, ''Capabilities of Nuclear Weapons'' (DNA-EM-1, 1 July 1972). Controversial publication Dolan helped compile the controversial U.S. Army Field Manual, ''Nuclear Weapons Employment'', FM 101–31, in 1963. Freeman Dyson ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Point
The United States Military Academy (USMA), commonly known as West Point, is a United States service academies, United States service academy in West Point, New York that educates cadets for service as Officer_(armed_forces)#United_States, commissioned officers in the United States Army. The academy was founded in 1802, and it is the oldest of the five United States service academies, American service academies. The Army has occupied the site since establishing a fort there in 1780 during the American Revolutionary War, as it sits on strategic high ground overlooking the Hudson River north of New York City. West Point's academic program grants the Bachelor of Science degree with a curriculum that grades cadets' performance upon a broad academic program, military leadership performance, and mandatory participation in competitive athletics. Candidates for admission must apply directly to the academy and receive a nomination, usually from a member of United States Congress, Congr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fallout
Nuclear fallout is residual radioactive material that is created by the reactions producing a nuclear explosion. It is initially present in the radioactive cloud created by the explosion, and "falls out" of the cloud as it is moved by the atmosphere in the minutes, hours, and days after the explosion. The bulk of the radioactivity from nuclear fallout comes from fission products, which are created by the nuclear fission reactions of the nuclear device. Un-fissioned bomb fuel (such as plutonium and uranium), and radioactive isotopes created by neutron activation, make up a smaller amount of the radioactive content of fallout. The amount of fallout and its distribution is dependent on several factors, including the overall yield of the weapon, the fission yield of the weapon, the height of burst of the weapon, and meteorological conditions. Fallout can have serious human health consequences on both short- and long-term time scales, and can cause radioactive contamination far ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operation Castle
Operation Castle was a United States series of high-yield (high-energy) nuclear tests by Joint Task Force 7 (JTF-7) at Bikini Atoll beginning in March 1954. It followed ''Operation Upshot–Knothole'' and preceded '' Operation Teapot''. Conducted as a joint venture between the Atomic Energy Commission (AEC) and the Department of Defense (DoD), the ultimate objective of the operation was to test designs for an aircraft-deliverable thermonuclear weapon. All the devices tested, which ranged in weight from , were built to be dropped from aircraft. However, ballistic casings, fins and fusing systems would have to be attached. Operation Castle was considered by government officials to be a success as it proved the feasibility of deployable "dry" fuel designs for thermonuclear weapons. There were technical difficulties with some of the tests: one device had a yield much lower than predicted (a " fizzle"), while two other bombs detonated with over twice their predicted yields. One ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecological
Ecology () is the natural science of the relationships among living organisms and their environment. Ecology considers organisms at the individual, population, community, ecosystem, and biosphere levels. Ecology overlaps with the closely related sciences of biogeography, evolutionary biology, genetics, ethology, and natural history. Ecology is a branch of biology, and is the study of abundance, biomass, and distribution of organisms in the context of the environment. It encompasses life processes, interactions, and adaptations; movement of materials and energy through living communities; successional development of ecosystems; cooperation, competition, and predation within and between species; and patterns of biodiversity and its effect on ecosystem processes. Ecology has practical applications in fields such as conservation biology, wetland management, natural resource management, and human ecology. The word ''ecology'' () was coined in 1866 by the German scientist Ern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emu Field
Emu Field (also Emu Junction or simply Emu) is the site of Operation Totem, a pair of nuclear tests conducted by the British Government in South Australia during October 1953. The site was surveyed by Len Beadell in 1952. A village and airstrip were constructed for the subsequent testing program. The site was supported from the RAAF Woomera Range Complex. Two British nuclear weapon tests were conducted at the site. ''Totem I'' was detonated on 15 October 1953 and ''Totem II'' was detonated on 27 October 1953. The devices were both sited on towers and yielded 9 kilotons and 7 kilotons respectively. The site was also used in September–October 1953 for some of the Kitten series of tests, which were conventional (rather than nuclear) explosions used to evaluate neutron initiators. It was later found that the radioactive Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maralinga
Maralinga is a desert area around large located in the west of South Australia, within the Great Victoria Desert. The area is best known for being the location of several British nuclear tests in the 1950s. In January 1985, in recognition of their native title, freehold title was granted to the Maralinga Tjarutja, a southern Pitjantjatjara Aboriginal Australian people, over some land. Around the same time, the McClelland Royal Commission identified significant residual nuclear contamination at some sites. Under an agreement between the governments of the United Kingdom and Australia, efforts were made to clean up the site before the Maralinga people resettled on the land in 1995. The main community, which includes a school, is Oak Valley. There are still concerns that some of the ground is still contaminated, despite two attempts at cleanup. History Nuclear tests and cleanup Maralinga was the scene of UK nuclear testing and was contaminated with radioactive waste in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montebello Islands
The Montebello Islands, also rendered as the Monte Bello Islands, are an archipelago of around 174 small islands, about 92 of which are named, lying north of Barrow Island (Western Australia), Barrow Island and off the Pilbara region of Western Australia, Pilbara coast of north-western Australia. The islands form a marine conservation reserve of administered by the Western Australian Department of Environment and Conservation (Western Australia), Department of Environment and Conservation. The islands were the site of three British atmospheric nuclear weapons tests, in 1952 and 1956. Description The islands of the archipelago have a collective land area of about . The largest islands, Hermite and Trimouille, have an area of and respectively. They consist of limestone rock and sand. The rocky parts are dominated by ''Triodia (grass), Triodia'' hummock grassland with scattered shrubs, while the sandy areas support grasses such as Cyperaceae, sedges, and shrubs, mainly ''A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nevada Test Site
The Nevada National Security Sites (N2S2 or NNSS), popularized as the Nevada Test Site (NTS) until 2010, is a reservation of the United States Department of Energy located in the southeastern portion of Nye County, Nevada, about northwest of the city of Las Vegas. Formerly known as the Nevada Proving Grounds of the United States Army, the site was acquired in 1951 to be the testing venue for the American nuclear devices. The first atmospheric test was conducted at the site's Frenchman Flat area by the United States Atomic Energy Commission (USAEC) on January 27, 1951. About 928 nuclear tests were conducted here through 1994, when the United States stopped its underground nuclear testing. The site consists of about of desert and mountainous terrain. Some 1,100 buildings in 28 areas are connected by of paved roads, of unpaved roads, ten heliports, and two airstrips. The site is privately managed and operated by Mission Support and Test Services LLC, a joint venture of H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eniwetok Atoll
Enewetak Atoll (; also spelled Eniwetok Atoll or sometimes Eniewetok; , , or , ; known to the Japanese as Brown Atoll or Brown Island; ) is a large coral atoll of 40 islands in the Pacific Ocean and with its 296 people (as of 2021) forms a legislative district of the Ralik Chain of the Marshall Islands. With a land area total less than , it is no higher than and surrounds a deep central lagoon, in circumference. It is the second-westernmost atoll of the Ralik Chain and is west from Bikini Atoll. It was held by the Japanese from 1914 until its capture by the United States in February 1944 during World War II, then became Naval Base Eniwetok. Nuclear testing by the US, totaling the equivalent of over 30 megatons of TNT, took place during the Cold War; in 1977–1980, a concrete dome (the Runit Dome) was built on Runit Island to deposit radioactive soil and debris. The Runit Dome is deteriorating and could be breached by a typhoon, though the sediments in the lagoon are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bikini Atoll
Bikini Atoll ( or ; Marshallese language, Marshallese: , , ), known as Eschscholtz Atoll between the 19th century and 1946, is a coral reef in the Marshall Islands consisting of 23 islands surrounding a central lagoon. The atoll is at the northern end of the Ralik Chain, approximately northwest of the capital Majuro. After the Second World War, the atoll was chosen by the United States as a nuclear weapon testing site. It would be the site of the fourth nuclear bomb detonation and would go on to be the site of many more tests. The people that lived on Bikini—all 167 of the atoll's inhabitants—agreed to relocate after being informed of the plan to test then-new nuclear weapons, of great importance to humankind, though it is sometimes considered a forced relocation. In 1946 they moved to Rongerik, a small island east of Bikini Atoll, but it turned out to have inadequate resources to support the population. The islanders began experiencing starvation by early 1948, and they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Röntgen Equivalent Man
The roentgen equivalent man (rem) is a CGS unit of equivalent dose, effective dose, and committed dose, which are dose measures used to estimate potential health effects of low levels of ionizing radiation on the human body. Quantities measured in rem are designed to represent the stochastic biological risk of ionizing radiation, which is primarily radiation-induced cancer. These quantities are derived from absorbed dose, which in the CGS system has the unit rad. There is no universally applicable conversion constant from rad to rem; the conversion depends on relative biological effectiveness (RBE). The rem has been defined since 1976 as equal to 0.01 sievert, which is the more commonly used SI unit outside the United States. Earlier definitions going back to 1945 were derived from the roentgen unit, which was named after Wilhelm Röntgen, a German scientist who discovered X-rays. The unit name is misleading, since 1 roentgen actually deposits about 0.96 rem in soft bio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cockroach
Cockroaches (or roaches) are insects belonging to the Order (biology), order Blattodea (Blattaria). About 30 cockroach species out of 4,600 are associated with human habitats. Some species are well-known Pest (organism), pests. Modern cockroaches are an ancient group that first appeared during the Late Jurassic, with their ancestors, known as "Roachoid, roachoids", likely originating during the Carboniferous period around 320 million years ago. Those early ancestors, however, lacked the internal ovipositors of modern roaches. Cockroaches are somewhat generalized insects lacking special adaptations (such as the sucking Insect mouthparts, mouthparts of aphids and other Hemiptera, true bugs); they have chewing mouthparts and are probably among the most primitive of living Neopteran insects. They are common and hardy insects capable of tolerating a wide range of Köppen climate classification, climates, from Arctic cold to Tropics, tropical heat. Tropical cockroaches are often muc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
