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Engineer Research And Development Laboratory
The Engineer Research and Development Laboratory (ERDL) was a United States Army Corps of Engineers research facility located at Fort Belvoir, Virginia. The ERDL performed research and development related to earthmoving, industrial engines and turbines, fuels handling, environmental control, electric power and propulsion, direct energy sources, detectors, bridges and marine craft, mine warfare, fortifications and obstacles, camouflage and deception, water purification, nuclear weapons effects, materials, and environmental testing. It also prepared procurement data, packages including development of specifications of materiel procured in quantity; engineering studies and tests to determine performance and quality assurance data for standardization documents; evaluation of unsatisfactory equipment reports and development of equipment modifications; tests of preproduction models, production samples and production sampling techniques; industrial engineering for all items ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States asserts sovereignty over five Territories of the United States, major island territories and United States Minor Outlying Islands, various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's List of countries and dependencies by area, third-largest land area and List of countries and dependencies by population, third-largest population, exceeding 340 million. Its three Metropolitan statistical areas by population, largest metropolitan areas are New York metropolitan area, New York, Greater Los Angeles, Los Angel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boat
A boat is a watercraft of a large range of types and sizes, but generally smaller than a ship, which is distinguished by its larger size or capacity, its shape, or its ability to carry boats. Small boats are typically used on inland waterways such as rivers and lakes, or in protected coastal areas. However, some boats (such as whaleboats) were intended for offshore use. In modern Navy, naval terms, a boat is a vessel small enough to be carried aboard a ship. Boats vary in proportion and construction methods with their intended purpose, available materials, or local traditions. Canoes have been used since prehistoric times and remain in use throughout the world for transportation, fishing, and sport. Fishing boats vary widely in style partly to match local conditions. Pleasure boat, Pleasure craft used in boating, recreational boating include ski boats, Pontoon (boat), pontoon boats, and sailboats. House boats may be used for vacationing or long-term residence. Lighter (barge), L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Specification (technical Standard)
A specification often refers to a set of documented requirements to be satisfied by a material, design, product, or service. A specification is often a type of technical standard. There are different types of technical or engineering specifications (specs), and the term is used differently in different technical contexts. They often refer to particular documents, and/or particular information within them. The word ''specification'' is broadly defined as "to state explicitly or in detail" or "to be specific". A requirement specification is a documented requirement, or set of documented requirements, to be satisfied by a given material, design, product, service, etc. It is a common early part of engineering design and product development processes in many fields. A functional specification is a kind of requirement specification, and may show functional block diagrams. A design or product specification describes the features of the ''solutions'' for the Requirement Specificatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Materiel
Materiel or matériel (; ) is supplies, equipment, and weapons in military supply-chain management, and typically supplies and equipment in a commerce, commercial supply chain management, supply chain context. Military In a military context, the term ''materiel'' refers either to the specific needs (excluding manpower) of a force to complete a specific military operation, mission, or the general sense of the needs (excluding manpower) of a functioning army. An important category of materiel is commonly referred to as ordnance, especially concerning mounted guns (artillery) and the shell (projectile), shells they consume. Along with fuel, and ammunition, munitions in general, the steady supply of ordnance is an ongoing logistical challenge in active combat zones. Materiel management consists of continuing actions relating to planning, organizing, directing, coordinating, controlling, and evaluating the application of resources to ensure the effective and economical support of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Military Acquisition
Military acquisition or defense acquisition is the "bureaucracy, bureaucratic management and procurement process", dealing with a nation's investments in the technologies, programs, and product support necessary to achieve its national National Security Strategy (United States), security strategy and support its Military, armed forces. Its objective is to acquire products that satisfy specified needs and provide measurable improvement to mission capability at a fair and reasonable price. Concept Military acquisition has a long history spanning from ancient times (e.g., blacksmithing, shipbuilding) to modern times. Modern military acquisition is a complex blend of science, management, and engineering disciplines within the context of a nation's law and regulation framework to produce military material and technology. This complexity evolved from the increasing complexity of weapon systems starting in the 20th century. For example, the Manhattan Project involved more than 130,00 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
US National Archives
The National Archives and Records Administration (NARA) is an independent agency of the United States government within the executive branch, charged with the preservation and documentation of government and historical records. It is also tasked with increasing public access to those documents that make up the National Archives. NARA is officially responsible for maintaining and publishing the legally authentic and authoritative copies of acts of Congress, presidential directives, and federal regulations. NARA also transmits votes of the Electoral College (United States), Electoral College to Congress. It also examines Electoral College and Article Five of the United States Constitution#Ratification of amendments, constitutional amendment ratification documents for prima facie legal sufficiency and an authenticating signature. The National Archives, and its publicly exhibited Charters of Freedom, which include the original United States Declaration of Independence, Constitution ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Environmental Testing
Environmental testing is the measurement of the performance of equipment under specified environmental conditions. This can include the following: * High and low extreme temperatures * Temperature cycling * Sand and dust exposure * Salt spray * High and low humidity * Wet environments * Deep water submersion * Corrosive material exposure * Algae and microbial exposure * Shock and vibrations, including gun fire * High and low pressure * Pressure cycling * Electromagnetic interference Such tests are most commonly performed on equipment used in military, maritime, aeronautical and space applications. Standards Environmental test standards include: * MIL-STD-810 * MIL-HDBK-2036 * IEC 60068 * IEC 60945 * RTCA DO-160 * MIL-STD-461 See also *Environmental stress screening Environmental stress screening (ESS) refers to the process of exposing a newly manufactured or repaired product or component (typically electronic) to stresses such as thermal cycling and vibration in order to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Materials Science
Materials science is an interdisciplinary field of researching and discovering materials. Materials engineering is an engineering field of finding uses for materials in other fields and industries. The intellectual origins of materials science stem from the Age of Enlightenment, when researchers began to use analytical thinking from chemistry, physics, and engineering to understand ancient, phenomenological observations in metallurgy and mineralogy. Materials science still incorporates elements of physics, chemistry, and engineering. As such, the field was long considered by academic institutions as a sub-field of these related fields. Beginning in the 1940s, materials science began to be more widely recognized as a specific and distinct field of science and engineering, and major technical universities around the world created dedicated schools for its study. Materials scientists emphasize understanding how the history of a material (''processing'') influences its struc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Weapon Effects
The effects of a nuclear explosion on its immediate vicinity are typically much more destructive and multifaceted than those caused by conventional explosives. In most cases, the energy released from a nuclear weapon detonated within the lower atmosphere can be approximately divided into four basic categories: *the blast and shock wave: 50% of total energy *thermal radiation: 35% of total energy *ionizing radiation: 5% of total energy (more in a neutron bomb) * residual radiation: 5–10% of total energy with the mass of the explosion. Depending on the design of the weapon and the location in which it is detonated, the energy distributed to any one of these categories may be significantly higher or lower. The physical blast effect is created by the coupling of immense amounts of energy, spanning the electromagnetic spectrum, with the surroundings. The environment of the explosion (e.g. submarine, ground burst, air burst, or exo-atmospheric) determines how much energy is distrib ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Purification
Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water. The goal is to produce water that is fit for specific purposes. Most water is purified and disinfected for human consumption (drinking water), but water purification may also be carried out for a variety of other purposes, including medical, pharmacological, chemical, and industrial applications. The history of water purification includes a wide variety of methods. The methods used include physical processes such as filtration, sedimentation, and distillation; biological processes such as slow sand filters or biologically active carbon; chemical processes such as flocculation and chlorination; and the use of electromagnetic radiation such as ultraviolet light. Water purification can reduce the concentration of particulate matter including suspended particles, parasites, bacteria, algae, viruses, and fungi as well as reduce the concentration ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Military Deception
Military deception (MILDEC) is an attempt by a military unit to gain an advantage during warfare by misleading adversary decision makers into taking action or inaction that creates favorable conditions for the deceiving force. This is usually achieved by creating or amplifying an artificial fog of war via psychological operations, information warfare, visual deception, or other methods. As a form of disinformation, it overlaps with psychological warfare. Military deception is also closely connected to operations security (OPSEC) in that OPSEC attempts to conceal from the adversary critical information about an organization's capabilities, activities, limitations, and intentions, or provide a plausible alternate explanation for the details the adversary can observe, while deception reveals false information in an effort to mislead the adversary. Deception in warfare dates back to early history. ''The Art of War'', an ancient Chinese military treatise, emphasizes the importance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Military Camouflage
Military camouflage is the use of camouflage by an Military, armed force to protect personnel and equipment from observation by enemy forces. In practice, this means applying colour and materials to military equipment of all kinds, including vehicles, ships, aircraft, gun positions and battledress, either to conceal it from observation (crypsis), or to make it appear as something else (mimicry). The French slang word ''wikt:camouflage, camouflage'' came into common English usage during World War I when the concept of visual deception developed into an essential part of modern military tactics. In that war, long-range artillery and observation from the air combined to expand the field of fire, and camouflage was widely used to decrease the danger of being targeted or enable surprise. As such, military camouflage is a form of military deception in addition to cultural functions such as political identification. Camouflage was first practiced in simple form in the mid 18th centur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
