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Philadelphia Naval Yard
The Philadelphia Naval Shipyard was an important naval shipyard of the United States for almost two centuries. Philadelphia's original navy yard, begun in 1776 on Front Street and Federal Street in what is now the Pennsport section of the city, was the first naval shipyard of the United States. It was replaced by a new, much larger yard developed around facilities begun in 1871 on League Island, at the confluence of the Delaware and Schuylkill rivers. The Navy Yard expansion stimulated the development over time of residential and businesses in South Philadelphia, where many shipyard workers lived. During World War II, some 40,000 workers operated on shifts around the clock to produce and repair ships at the yard for the war effort. The United States Navy ended most of its activities there in the 1990s, closing its base after recommendations by the Base Realignment and Closure commission. In 2000, the Philadelphia Industrial Development Corporation, on behalf of the city of Ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philadelphia
Philadelphia, often called Philly, is the largest city in the Commonwealth of Pennsylvania, the sixth-largest city in the U.S., the second-largest city in both the Northeast megalopolis and Mid-Atlantic regions after New York City. Since 1854, the city has been coextensive with Philadelphia County, the most populous county in Pennsylvania and the urban core of the Delaware Valley, the nation's seventh-largest and one of world's largest metropolitan regions, with 6.245 million residents . The city's population at the 2020 census was 1,603,797, and over 56 million people live within of Philadelphia. Philadelphia was founded in 1682 by William Penn, an English Quaker. The city served as capital of the Pennsylvania Colony during the British colonial era and went on to play a historic and vital role as the central meeting place for the nation's founding fathers whose plans and actions in Philadelphia ultimately inspired the American Revolution and the nation's inde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Aircraft Factory
The Naval Aircraft Factory (NAF) was established by the United States Navy in 1918 in Philadelphia, Pennsylvania. It was created to help solve aircraft supply issues which faced the Navy Department upon the entry of the U.S. into World War I. The US Army’s requirements for an enormous quantity of airplanes created a decided lack of interest among aircraft manufacturers in the Navy's requirements for a comparatively small quantity of aircraft. The Navy Department concluded that it was necessary to build a Navy-owned aircraft factory in order to assure a part of its aircraft supply; to obtain cost data for the department’s guidance in its dealings with private manufacturers; and to have under its own control a factory capable of producing experimental designs. History On 27 July 1917, Secretary of the Navy Josephus Daniels approved the construction of the Naval Aircraft Factory, as a means for the government to promote industry efficiency, ensure engineering expertise, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USS Blue Ridge (LCC-19)
USS ''Blue Ridge'' (LCC-19) is the lead ship of the two amphibious command ships of the United States Navy, and is the flagship of the Seventh Fleet. Her primary role is to provide command, control, communications, computers, and intelligence (C4I) support to the commander and staff of the United States Seventh Fleet. She is currently forward-deployed to U.S. Navy Fleet Activities, Yokosuka in Japan, and is the third Navy ship named after the Blue Ridge Mountains, a range of mountains in the Appalachian Mountains of the eastern United States. ''Blue Ridge'' is the oldest deployed warship of the U.S. Navy, following the decommissioning of . ''Blue Ridge'', as the U.S. Navy's active commissioned ship having the longest total period as active, flies the First Navy Jack instead of the jack of the United States. ''Blue Ridge'' is expected to remain in service until 2039. History ''Blue Ridge'' was put "in commission special" on 14 November 1970, at the Philadelphia Naval Shipyard ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Four Chaplains
The Four Chaplains, also referred to as the Immortal Chaplains or the ''Dorchester'' Chaplains, were four World War II chaplains who died rescuing civilian and military personnel as the American troop ship sank on February 3, 1943, in what has been referred to as the second-worst sea disaster of WW II. The ''Dorchester'' was a civilian liner converted for military service in World War II as a War Shipping Administration troop transport. She was able to carry slightly more than 900 military passengers and crew. The ship left New York on January 23, 1943, en route to Greenland, carrying approximately 900 as part of a convoy of three ships escorted by Coast Guard Cutters ''Tampa'', ''Escanaba'', and ''Comanche''. During the early morning hours of February 3 the vessel was torpedoed by the off Newfoundland in the North Atlantic. The chaplains helped the other soldiers board lifeboats and gave up their own life jackets when the supply ran out. The chaplains joined arms, said prayer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manhattan Project
The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom and Canada. From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the United States Army Corps of Engineers, U.S. Army Corps of Engineers. Nuclear physicist Robert Oppenheimer was the director of the Los Alamos Laboratory that designed the actual bombs. The Army component of the project was designated the Manhattan District as its first headquarters were in Manhattan; the placename gradually superseded the official codename, Development of Substitute Materials, for the entire project. Along the way, the project absorbed its earlier British counterpart, Tube Alloys. The Manhattan Project began modestly in 1939, but grew to employ more than 130,000 people and cost nearly US$2 billion (equivalent to about $ billion in ). Over 90 percent of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uranium-235
Uranium-235 (235U or U-235) is an isotope of uranium making up about 0.72% of natural uranium. Unlike the predominant isotope uranium-238, it is fissile, i.e., it can sustain a nuclear chain reaction. It is the only fissile isotope that exists in nature as a primordial nuclide. Uranium-235 has a half-life of 703.8 million years. It was discovered in 1935 by Arthur Jeffrey Dempster. Its fission cross section for slow thermal neutrons is about 584.3±1 barns. For fast neutrons it is on the order of 1 barn. Most but not all neutron absorptions result in fission; a minority result in neutron capture forming uranium-236. Natural decay chain :\begin \ce \begin \ce \\ \ce \end \ce \\ \ce \begin \ce \\ \ce \end \ce \end Fission properties The fission of one atom of uranium-235 releases () inside the reactor. That corresponds to 19.54 TJ/ mol, or 83.14 TJ/kg. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philip Abelson
Philip, also Phillip, is a male given name, derived from the Greek (''Philippos'', lit. "horse-loving" or "fond of horses"), from a compound of (''philos'', "dear", "loved", "loving") and (''hippos'', "horse"). Prominent Philips who popularized the name include kings of Macedonia and one of the apostles of early Christianity. ''Philip'' has many alternative spellings. One derivation often used as a surname is Phillips. It was also found during ancient Greek times with two Ps as Philippides and Philippos. It has many diminutive (or even hypocoristic) forms including Phil, Philly, Lip, Pip, Pep or Peps. There are also feminine forms such as Philippine and Philippa. Antiquity Kings of Macedon * Philip I of Macedon * Philip II of Macedon, father of Alexander the Great * Philip III of Macedon, half-brother of Alexander the Great * Philip IV of Macedon * Philip V of Macedon New Testament * Philip the Apostle * Philip the Evangelist Others * Philippus of Croton (c. 6th centur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USS Wisconsin (BB-64)
USS ''Wisconsin'' (BB-64) is an and the second ship of the United States Navy to be named in honor of the U.S. state of Wisconsin. She was built at the Philadelphia Naval Shipyard in Philadelphia, Pennsylvania, and launched on 7 December 1943 (the second anniversary of the Pearl Harbor raid), sponsored by Margaret Goodland, wife of Governor Walter Goodland of Wisconsin. During her career, ''Wisconsin'' served in the Pacific theater of World War II, where she shelled Japanese fortifications and screened United States aircraft carriers as they conducted air raids against enemy positions. During the Korean War, ''Wisconsin'' shelled North Korean targets in support of United Nations and South Korean ground operations, after which she was decommissioned. She was reactivated on 1 August 1986; after a modernization program, she participated in Operation Desert Storm in January and February 1991. ''Wisconsin'' was last decommissioned in September 1991 after a total of 14 years ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USS New Jersey (BB-62)
USS ''New Jersey'' (BB-62) is an , and was the second ship of the United States Navy to be named after the US state of New Jersey. She was often referred to fondly as "Big J". ''New Jersey'' earned more battle stars for combat actions than the other three completed ''Iowa''-class battleships, and was the only US battleship providing gunfire support during the Vietnam War. During World War II, ''New Jersey'' shelled targets on Guam and Okinawa, and screened aircraft carriers conducting raids in the Marshall Islands. During the Korean War, she was involved in raids up and down the North Korean coast, after which she was decommissioned into the United States Navy reserve fleets, better known as the "mothball fleet". She was briefly reactivated in 1968 and sent to Vietnam to support US troops before returning to the mothball fleet in 1969. Reactivated once more in the 1980s as part of the 600-ship Navy program, ''New Jersey'' was modernized to carry missiles and recommissioned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. World War II was a total war that directly involved more than 100 million personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the only two nuclear weapons ever used in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, mostly among civilians. Tens of millions died due to genocides (including the Holocaust), starvation, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mustin Field
Henry C. Mustin Naval Air Facility (IATA code MUV), also known as NAF Mustin Field, is a former military airfield located at the United States Navy Naval Aircraft Factory on board the Philadelphia Naval Shipyard, Philadelphia, Pennsylvania. It was in service from 1926 to 1963. History On 27 July 1917, Secretary of the Navy Josephus Daniels approved the development of a Naval Aircraft Factory as a Navy-owned aircraft design, production and evaluation facility. The factory opened 17 November 1917. Production of H-16 and MF flying boats began in 1918. Following World War I, "the factory's role was altered from production-focused to evaluation of different aircraft designs, with its production being limited to mainly prototype and small production lots of aircraft." The NAF produced Vought VE-7 airframes when the small Lewis & Vought organization was unable to handle a large production order. The factory also constructed nine Curtiss TS-1s, −2s, and −3s in 1922 for cost compari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bedford, Ohio
Bedford is a city in Cuyahoga County, Ohio, United States located to the east of Cleveland. The population was 13,074 at the 2010 census. It is an eastern first ring suburb of Cleveland. Geography Bedford is located at . It is a first ring suburb to the southeast of Cleveland. The city is bounded by Maple Heights to the north and west, Walton Hills and Oakwood to the south, and Bedford Heights to the east. According to the 2010 census, the city has a total area of , of which (or 99.07%) is land and (or 0.93%) is water. The boundaries of the city of Bedford include part of the Bedford Reservation. The reservation includes Tinker's Creek, which flows through a gorge that has been listed as a National Natural Landmark. The Great Falls of Tinker's Creek are within the city limits of Bedford. History The area that is now Bedford and northeastern Ohio was originally inhabited by Native Americans as early as 11,000 years ago. By 1662 the area had become a part of the Connect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
