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Clarence Hickman
Clarence Nichols Hickman (–) was a physicist who worked on rockets with Robert Goddard. He is known for developing the bazooka man-portable recoilless antitank rocket launcher weapon, and the American Piano Company Model B player piano. He is also known as the "Father of Scientific Archery". Life Early life Clarence Hickman was born on a farm established by his grandfather Leak on . The nearest town was Lizton, Indiana to the south. Clarence and his siblings attended the Leak country school until 1898, when the family moved northward to the Job Hadley farm, where the children attended another country school. In both residences, Clarence pursued an interest in archery, playing with bows and arrows made by his father. By his own account, The arrows had heavy heads so that we did not need feathers to guide the arrow.... We boys shot fish with bows, using umbrella staves as arrows. I well remember that I could not understand why we had to aim under the fish to hit it. It was not u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brackets
A bracket is either of two tall fore- or back-facing punctuation marks commonly used to isolate a segment of text or data from its surroundings. Typically deployed in symmetric pairs, an individual bracket may be identified as a 'left' or 'right' bracket or, alternatively, an "opening bracket" or "closing bracket", respectively, depending on the Writing system#Directionality, directionality of the context. Specific forms of the mark include parentheses (also called "rounded brackets"), square brackets, curly brackets (also called 'braces'), and angle brackets (also called 'chevrons'), as well as various less common pairs of symbols. As well as signifying the overall class of punctuation, the word "bracket" is commonly used to refer to a specific form of bracket, which varies from region to region. In most English-speaking countries, an unqualified word "bracket" refers to the parenthesis (round bracket); in the United States, the square bracket. Glossary of mathematical sym ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jamestown, Indiana
Jamestown is a town in Jackson Township, Boone County and Eel River Township, Hendricks County, Indiana, United States. The population was 958 at the 2010 census. History Jamestown was established in 1830, and was platted in 1832. The town was named for its founder, James Mattock. The town served as the original county seat of Boone County until 1831 when the legislature required that the county seat be moved towards the center of the district. In 1869, the Indianapolis, Bloomington and Western Railway (Later the Peoria and Eastern) came through the center of town on what was then Washington Street. The railroad remains today as the CSX Crawfordsville Sub and is the mainline from Indianapolis and Avon to Chicago. Additionally, Terre Haute, Indianapolis and Eastern Traction Company operated interurban service through Jamestown beginning in 1912 until its demise adjacent to the Big Four railroad, the remnants still being visible north of the railroad right of way. Geography ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington Navy Yard
The Washington Navy Yard (WNY) is the former shipyard and ordnance plant of the United States Navy in Southeast Washington, D.C. It is the oldest shore establishment of the U.S. Navy. The Yard currently serves as a ceremonial and administrative center for the U.S. Navy, home to the Chief of Naval Operations, and is headquarters for the Naval Sea Systems Command, Naval Reactors, Naval Facilities Engineering Systems Command, Naval History and Heritage Command, the National Museum of the United States Navy, the U.S. Navy Judge Advocate General's Corps, Marine Corps Institute, the United States Navy Band, and other more classified facilities. In 1998, the yard was listed as a Superfund site due to environmental contamination. History The history of the yard can be divided into its military history and cultural and scientific history. Military The land was purchased under an Act of Congress on July 23, 1799. The Washington Navy Yard was established on October 2, 1799, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Submarine Mines
A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, any vessel or a particular vessel type, akin to anti-infantry vs. anti-vehicle mines. Naval mines can be used offensively, to hamper enemy shipping movements or lock vessels into a harbour; or defensively, to protect friendly vessels and create "safe" zones. Mines allow the minelaying force commander to concentrate warships or defensive assets in mine-free areas giving the adversary three choices: undertake an expensive and time-consuming minesweeping effort, accept the casualties of challenging the minefield, or use the unmined waters where the greatest concentration of enemy firepower will be encountered. Although international law requires signatory nations to declare mined areas, precise locations remain secret; and non-complying individuals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
