All articles starting with U
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USPTO reaction dataset
The USPTO reaction dataset is a collection of about 1.8 million organic reactions text-mined from US patents, widely used to train machine learning models for synthesis planning.
USPTO-50k
USPTO-50k is a benchmark dataset of 50,016 atom-mapped chemical reactions curated from US patents, chiefly used to train and evaluate machine-learning models for single-step retrosynthesis prediction.
USS (ship prefix)
USS (United States Ship) is the prefix placed before the names of commissioned US Navy ships, first seen in the 1790s and standardized by executive order in 1907.
USS Abraham Lincoln (CVN-72)
USS Abraham Lincoln (CVN-72) is a United States Navy Nimitz-class nuclear-powered aircraft carrier, the fifth of ten, commissioned in 1989 and homeported in San Diego.
USS Akron
USS Akron (ZRS-4) was a US Navy rigid airship, a flying aircraft carrier built by Goodyear-Zeppelin, that crashed off New Jersey in April 1933, killing 73 of the 76 aboard.
USS Alabama (BB-60)
USS Alabama (BB-60), nicknamed Lucky A, is a South Dakota-class battleship commissioned in 1942 that served in the Atlantic and Pacific during World War II, preserved since 1965 at Mobile, Alabama.
USS Alaska (CB-1)
USS Alaska (CB-1) was the lead ship of the six Alaska-class large cruisers built for the United States Navy during World War II, commissioned in 1944.
USS Alaska (SSBN-732)
USS Alaska (SSBN-732) is a United States Navy Ohio-class ballistic missile submarine, commissioned in 1986 and homeported at Kings Bay, Georgia, carrying Trident II D5 missiles on deterrent patrols.
USS America (CV-66)
USS America (CV-66) was a Kitty Hawk-class aircraft carrier of the United States Navy, commissioned in 1965, which served in Vietnam and Desert Storm before being sunk as a target in 2005.
USS America (LHA-6)
USS America (LHA-6), lead ship of the America class of US Navy amphibious assault ships, commissioned October 11, 2014. Aviation-centric LHA with no well deck, 45,000 tons, based on Makin Island; forward-deployed to Sasebo, Japan 2019-2025.
USS Arizona
The USS Arizona was a Pennsylvania-class US Navy battleship commissioned in 1916 and destroyed in the Japanese attack on Pearl Harbor in 1941, killing 1,177 crewmen.
USS Arizona Memorial
USS Arizona Memorial, the 1962 white concrete memorial at Pearl Harbor, Oahu, spanning the sunken battleship USS Arizona and commemorating its 1,177 dead from the December 7, 1941 attack; designed by Alfred Preis, NPS-managed since 1980.
USS Arkansas (BB-33)
USS Arkansas (BB-33), Wyoming-class U.S. battleship commissioned 1912, last with 12-inch guns; served both world wars, Normandy, Iwo Jima, Okinawa; sunk at Bikini in 1946 Crossroads Test Baker.
USS Atlanta (1861)
USS Atlanta (1861), ex-Fingal, ex-CSS Atlanta: Glasgow-built blockade runner converted at Savannah into a Confederate casemate ironclad ram, captured by monitors Weehawken and Nahant at Wassaw Sound on 17 June 1863, then served in the Union Navy on the James River until 1865.
USS Bataan (LHD-5)
USS Bataan (LHD-5) is a Wasp-class amphibious assault ship of the United States Navy, commissioned in 1997 and carrying a Marine Expeditionary Unit of about 2,000 Marines.
USS Belleau Wood (LHA-3)
USS Belleau Wood (LHA-3) was a Tarawa-class amphibious assault ship of the United States Navy, commissioned in 1978 and decommissioned in 2005 after 27 years of service.
USS Benfold
USS Benfold (DDG-65) is an Arleigh Burke-class guided-missile destroyer of the United States Navy, commissioned in 1996 and named for Medal of Honor recipient Edward Benfold.
USS Blue Ridge (LCC-19)
USS Blue Ridge (LCC-19), lead ship of the Blue Ridge-class amphibious command ships, is the U.S. Seventh Fleet flagship at Yokosuka, Japan, since 1979. Commissioned 1970 in Philadelphia, she is the Navy's oldest operational ship, armed with two Phalanx CIWS.
USS Bonhomme Richard (1765)
USS Bonhomme Richard was a former French East Indiaman, the Duc de Duras, placed under John Paul Jones in 1779 and lost after capturing HMS Serapis.
USS Bonhomme Richard (LHD-6)
USS Bonhomme Richard (LHD-6), Wasp-class amphibious assault ship, destroyed by an arson-suspected fire on 12 July 2020 at Naval Base San Diego during maintenance; burned four days, decommissioned April 2021 and scrapped.
USS Bougainville (LHA-8)
USS Bougainville (LHA-8) is an America-class amphibious assault ship of the United States Navy, the first Flight 1 hull, restoring a well deck for landing craft.
USS Boxer (LHD-4)
USS Boxer (LHD-4) is a Wasp-class amphibious assault ship of the United States Navy, commissioned in 1995, homeported at San Diego, the sixth ship to bear the name.
USS Bulkeley
USS Bulkeley (DDG-84) is an Arleigh Burke-class guided-missile destroyer of the United States Navy, named for Medal of Honor recipient Vice Admiral John Duncan Bulkeley and based in Rota, Spain.
USS Bunker Hill (CV-17)
USS Bunker Hill (CV-17) was a US Navy Essex-class aircraft carrier of World War II, flagship of Admiral Mitscher, devastated by a kamikaze attack off Okinawa in May 1945.
USS California (BB-44)
USS California (BB-44) was a Tennessee-class battleship of the United States Navy, flagship of the Pacific Fleet, sunk at Pearl Harbor in 1941 and returned to combat in 1944.
USS Callister
USS Callister is the Black Mirror season 4 premiere (2017), written by Charlie Brooker and William Bridges and directed by Toby Haynes, in which programmer Robert Daly clones co-workers inside a Star Trek-styled game mod; it won four 2018 Emmys and received the sequel USS Callister: Into Infinity in 2025.
USS Callister: Into Infinity
USS Callister: Into Infinity is the 2025 Black Mirror season 7 finale and first-ever sequel episode, continuing 2017's USS Callister; directed by Toby Haynes, written by Charlie Brooker and others, it strands the cloned crew in the game Infinity.
USS Carl Vinson
USS Carl Vinson (CVN 70) is the third Nimitz-class nuclear-powered aircraft carrier of the United States Navy, homeported in San Diego and named for Congressman Carl Vinson of Georgia.
USS Carney
USS Carney (DDG-64) is a US Navy Arleigh Burke-class guided-missile destroyer commissioned in 1996 and named for Admiral Robert Carney, Chief of Naval Operations under Eisenhower.
USS Carter Hall (LSD-50)
USS Carter Hall (LSD-50), a Harpers Ferry-class dock landing ship of the U.S. Navy, commissioned 30 September 1995, homeported at Joint Expeditionary Base Little Creek-Fort Story, Virginia; second ship of the name, well deck for two LCACs, frequent Bataan ARG deployments.