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Polaris Expedition
The ''Polaris'' expedition of 1871–1873 was one of the first serious attempts to reach the North Pole after that of British naval officer Sir Edward Parry, who reached 82nd parallel north, 82° 45′ N in 1827. Funded by the U.S. government, the expedition's notable achievement was reaching 82° 29′ N by ship, a record at the time. The expedition was commanded by the experienced and self-taught Arctic explorer Charles Francis Hall, who had previously lived among the Inuit in the Arctic region during previous attempts to determine the fate of Franklin's lost expedition of 1845. Hall possessed the necessary survival skills, but lacked an academic background and had no experience leading men or commanding a ship. He had managed to secure the position of expedition commander based on his authority on the subject of the Arctic. departed from New York City in June 1871. Barely underway, the expedition already found itself hampered by poor leadership. Insubordination ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TAU ART 000113 0002
Tau (; uppercase Τ, lowercase τ or \boldsymbol\tau; ) is the nineteenth letter of the Greek alphabet, representing the voiceless dental or alveolar plosive . In the system of Greek numerals, it has a value of 300. The name in English is pronounced or , but in Greek it is . This is because the pronunciation of the combination of Greek letters αυ can have the pronunciation of either , or , depending on what follows and if a diaeresis is present on the second vowel (see Greek orthography). Tau was derived from the Phoenician letter taw (𐤕). Letters that arose from tau include Roman T and Cyrillic Te (Т, т). Modern usage The lower-case letter τ is used as a symbol for: * Specific tax amount Biology * The expressed period of the freerunning rhythm of an animal, i.e., the length of the daily cycle of an animal when kept in constant light or constant darkness * The dose interval in pharmacokinetics * The core variable in general tau theory * Tau in bioche ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elisha Kent Kane
Elisha Kent Kane (February 3, 1820 – February 16, 1857) was a United States Navy medical officer and Arctic explorer. He served as assistant surgeon during Caleb Cushing's journey to China to negotiate the Treaty of Wangxia and in the Africa Squadron. He was assigned as a special envoy to the United States Army during the Mexican–American War and as a surveyor in the United States Coast Survey. He was senior medical officer in the First Grinnell expedition to rescue or discover the fate of the explorer Sir John Franklin. He was credited with the discovery of an encampment and gravesite from Franklin's lost expedition on Beechey Island. He led the Second Grinnell expedition to the Arctic which was unsuccessful in discovering the fate of Franklin's expedition. His explorations of the Arctic went further North than any other expeditions at the time and led to the eventual path to the North Pole taken by subsequent explorers. He spoke frequently to large audiences abo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schooner
A schooner ( ) is a type of sailing ship, sailing vessel defined by its Rig (sailing), rig: fore-and-aft rigged on all of two or more Mast (sailing), masts and, in the case of a two-masted schooner, the foremast generally being shorter than the mainmast. A common variant, the topsail schooner also has a square topsail on the foremast, to which may be added a Topgallant sail, topgallant. Differing definitions leave uncertain whether the addition of a Course (sail), fore course would make such a vessel a brigantine. Many schooners are Gaff rig, gaff-rigged, but other examples include Bermuda rig and the staysail schooner. Etymology The term "schooner" first appeared in eastern North America in the early 1700s. The term may be related to a Scots language, Scots word meaning to skip over water, or to skip stones. History The exact origins of schooner rigged vessels are obscure, but by early 17th century they appear in paintings by Dutch marine artists. The earliest known il ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington Navy Yard
The Washington Navy Yard (WNY) is a ceremonial and administrative center for the United States Navy, located in the federal national capital city of Washington, D.C. (federal District of Columbia). It is the oldest shore establishment / base of the United States Navy, established 1799, situated along the north shore of the Anacostia River (Eastern Branch of the Potomac River) in the adjacent Navy Yard (Washington, D.C.), Navy Yard neighborhood of Southeast, Washington, D.C. Formerly operating as a shipyard since the end of the 18th century / beginning of the 19th century, and Weapon, ordnance plant, the yard currently serves as home to the Chief of Naval Operations (CNO), commanding the U.S. Navy, and is headquarters for the several military agencies and commands of: Naval Sea Systems Command, Naval Reactors, Naval Facilities Engineering Systems Command, Naval History and Heritage Command, Commander, Navy Installations Command, Navy Installations Command, the National Museum of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Navy
The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 million tons in 2021. It has the world's largest aircraft carrier fleet, with List of aircraft carriers in service, eleven in service, one undergoing trials, two new carriers under construction, and six other carriers planned as of 2024. With 336,978 personnel on active duty and 101,583 in the Ready Reserve, the U.S. Navy is the third largest of the United States military service branches in terms of personnel. It has 299 deployable combat vessels and about 4,012 operational aircraft as of 18 July 2023. The U.S. Navy is one of six United States Armed Forces, armed forces of the United States and one of eight uniformed services of the United States. The United States Navy traces its origins to the Continental Navy, which was established during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George M
''George M!'' is a Broadway theatre, Broadway musical based on the life of George M. Cohan, the biggest Broadway star of his day who was known as "The Man Who Owned Broadway." The book for the musical was written by Michael Stewart (playwright), Michael Stewart, John Pascal, and Francine Pascal. Music and lyrics were by George M. Cohan himself, with revisions for the musical by Cohan's daughter, Mary Cohan. The story covers the period from the late 1880s until 1937 and focuses on Cohan's life and show business career from his early days in vaudeville with his parents and sister to his later success as a Broadway singer, dancer, composer, lyricist, theatre director and theatre producer, producer. The show includes such Cohan hit songs as "Give My Regards To Broadway", "You're a Grand Old Flag", and "Yankee Doodle Dandy." Productions The musical opened on Broadway at the Palace Theatre (New York City), Palace Theatre on April 10, 1968, and closed on April 26, 1969, after 433 pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secretary Of The Navy
The Secretary of the Navy (SECNAV) is a statutory officer () and the head (chief executive officer) of the Department of the Navy, a military department within the United States Department of Defense. On March 25, 2025, John Phelan was confirmed as Secretary of the Navy. By law, the Secretary of the Navy must be a civilian at least five years removed from active military service. The secretary is appointed by the president and requires confirmation by the Senate. History The position of Secretary of the Navy was created in 1798. It was a member of the president's Cabinet until 1949, when the Secretary of the Navy (and the secretaries of the Army and Air Force) were by amendments to the National Security Act of 1947 made subordinate to the secretary of defense. From 2001 to 2019, proposals to rename the Department of the Navy to the Department of the Navy and Marine Corps, which would have also renamed the Secretary of the Navy to the Secretary of the Navy and Marine Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Congress
The United States Congress is the legislature, legislative branch of the federal government of the United States. It is a Bicameralism, bicameral legislature, including a Lower house, lower body, the United States House of Representatives, U.S. House of Representatives, and an Upper house, upper body, the United States Senate, U.S. Senate. They both meet in the United States Capitol in Washington, D.C. Members of Congress are chosen through direct election, though vacancies in the Senate may be filled by a Governor (United States), governor's appointment. Congress has a total of 535 voting members, a figure which includes 100 United States senators, senators and 435 List of current members of the United States House of Representatives, representatives; the House of Representatives has 6 additional Non-voting members of the United States House of Representatives, non-voting members. The vice president of the United States, as President of the Senate, has a vote in the Senate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Senate
The United States Senate is a chamber of the Bicameralism, bicameral United States Congress; it is the upper house, with the United States House of Representatives, U.S. House of Representatives being the lower house. Together, the Senate and House have the authority under Article One of the United States Constitution, Article One of the Constitution of the United States, U.S. Constitution to pass or defeat federal legislation. The Senate also has exclusive power to confirm President of the United States, U.S. presidential appointments, to approve or reject treaties, and to convict or exonerate Impeachment in the United States, impeachment cases brought by the House. The Senate and the House provide a Separation of powers under the United States Constitution, check and balance on the powers of the Federal government of the United States#Executive branch, executive and Federal judiciary of the United States, judicial branches of government. The composition and powers of the Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transatlantic Telegraph Cable
Transatlantic telegraph cables were undersea cables running under the Atlantic Ocean for telegraph communications. Telegraphy is a largely obsolete form of communication, and the cables have long since been decommissioned, but telephone and data are still carried on other transatlantic telecommunications cables. The Atlantic Telegraph Company led by Cyrus West Field constructed the first transatlantic telegraph cable. The project began in 1854 with the first cable laid from Valentia Island off the west coast of Ireland to Bay of Bulls, Trinity Bay, Newfoundland. The first communications occurred on August 16, 1858, but the line speed was poor. The first official telegram to pass between two continents that day was a letter of congratulations from Queen Victoria of the United Kingdom to President of the United States James Buchanan. Signal quality declined rapidly, slowing transmission to an almost unusable speed. The cable was destroyed after three weeks when Wildman ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hot Air Balloon
A hot air balloon is a lighter-than-air aircraft consisting of a bag, called an envelope, which contains heated air. Suspended beneath is a gondola or wicker basket (in some long-distance or high-altitude balloons, a capsule), which carries passengers and a source of heat, in most cases an open flame caused by burning liquid propane. The heated air inside the envelope makes it buoyant, since it has a lower density than the colder air outside the envelope. As with all aircraft, hot air balloons cannot fly beyond the atmosphere. The envelope does not have to be sealed at the bottom, since the air inside the envelope is at about the same pressure as the surrounding air. In modern sport balloons the envelope is generally made from nylon fabric, and the inlet of the balloon (closest to the burner flame) is made from a fire-resistant material such as Nomex. Modern balloons have been made in many shapes, such as rocket ships and the shapes of various commercial products, thou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Engraving
Engraving is the practice of incising a design on a hard, usually flat surface by cutting grooves into it with a Burin (engraving), burin. The result may be a decorated object in itself, as when silver, gold, steel, or Glass engraving, glass are engraved, or may provide an Intaglio (printmaking), intaglio printing plate, of copper or another metal, for printing images on paper as prints or illustrations; these images are also called "engravings". Engraving is one of the oldest and most important techniques in printmaking. Wood engravings, a form of relief printing and stone engravings, such as petroglyphs, are not covered in this article. Engraving was a historically important method of producing images on paper in artistic printmaking, in mapmaking, and also for commercial reproductions and illustrations for books and magazines. It has long been replaced by various photographic processes in its commercial applications and, partly because of the difficulty of learning the techni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
