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Bitemporal Data
A temporal database stores data relating to time instances. It offers temporal data types and stores information relating to past, present and future time. Temporal databases could be uni-temporal, bi-temporal or tri-temporal. More specifically the temporal aspects usually include valid time, transaction time or decision time. * Valid time is the time period during which a fact is true in the real world. * Transaction time is the time at which a fact was recorded in the database. * Decision time is the time at which the decision was made about the fact. Uni-temporal A uni-temporal database has one axis of time, either the validity range or the system time range. Bi-temporal A bi-temporal database has two axes of time: * valid time * transaction time or decision time Tri-temporal A tri-temporal database has three axes of time: * valid time * transaction time * decision time This approach introduces additional complexities. Temporal databases are in contrast to current database ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valid Time
In temporal databases, valid time (VT) is the time period during which a database fact is valid in the modeled reality. As of December 2011, ISO/IEC 9075, Database Language SQL:2011 Part 2: SQL/Foundation included clauses in table definitions to define "application-time period tables" (that is, valid-time tables). ''Valid time'' was coined by Richard T. Snodgrass and his doctoral student.Richard T. Snodgrass and Ilsoo Ahn, "Temporal Databases," IEEE Computer 19(9), September, 1986, pp. 35-42. In a database table valid time is often represented by two extra table-columns ''StartVT'' and ''EndVT''. The time interval is closed at its lower bound and open at its upper bound. Example: Valid time is the time for which a fact is true in the real world. In the example above, the Person table gets two extra fields, Valid-From and Valid-To, specifying when a person's address was valid in the real world. On April 4, 1975, John's father proudly registered his son's birth. An official will ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bitemporal Relations
A temporal database stores data relating to time instances. It offers temporal data types and stores information relating to past, present and future time. Temporal databases could be uni-temporal, bi-temporal or tri-temporal. More specifically the temporal aspects usually include valid time, transaction time or decision time. * Valid time is the time period during which a fact is true in the real world. * Transaction time is the time at which a fact was recorded in the database. * Decision time is the time at which the decision was made about the fact. Uni-temporal A uni-temporal database has one axis of time, either the validity range or the system time range. Bi-temporal A bi-temporal database has two axes of time: * valid time * transaction time or decision time Tri-temporal A tri-temporal database has three axes of time: * valid time * transaction time * decision time This approach introduces additional complexities. Temporal databases are in contrast to current database ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1976 United States Presidential Election
The 1976 United States presidential election was the 48th quadrennial presidential election. It was held on Tuesday, November 2, 1976. Democrat Jimmy Carter of Georgia defeated incumbent Republican President Gerald Ford from Michigan by a narrow victory of 297 electoral college votes to Ford's 240. This is the most recent presidential election, and the first since 1920, in which both major-party candidates for vice-president would go on to become the presidential nominee for their party in a later election. President Richard Nixon had won the previous 1972 election, with Spiro Agnew as his running mate, but in 1973, Agnew resigned, and Ford was appointed as vice president. When Nixon resigned in 1974 in the wake of the Watergate scandal, Ford ascended to the presidency, becoming the first, and only, president to take office without having been elected as either president or vice president. The Watergate scandal badly damaged the entire Republican party and its election prospects ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nelson Rockefeller
Nelson Aldrich Rockefeller (July 8, 1908 – January 26, 1979), sometimes referred to by his nickname Rocky, was an American businessman and politician who served as the 41st vice president of the United States from 1974 to 1977. A member of the Republican Party and wealthy Rockefeller family, he previously served as the 49th governor of New York from 1959 to 1973. He also served as assistant secretary of State for American Republic Affairs for Presidents Franklin D. Roosevelt and Harry S. Truman (1944–1945) as well as under secretary of Health, Education and Welfare (HEW) under Dwight D. Eisenhower from 1953 to 1954. In 1980, HEW split into 2 cabinet level agencies: Health & Human Services (HHS) & Department of Education. A grandson of Standard Oil founder John D. Rockefeller, he was a noted art collector and served as administrator of Rockefeller Center in Manhattan, New York City. Rockefeller was often considered to be liberal, progressive, or moderate. In an agreement ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Congress
The United States Congress is the legislature of the federal government of the United States. It is bicameral, composed of a lower body, the House of Representatives, and an upper body, the Senate. It meets in the U.S. Capitol in Washington, D.C. Senators and representatives are chosen through direct election, though vacancies in the Senate may be filled by a governor's appointment. Congress has 535 voting members: 100 senators and 435 representatives. The U.S. vice president has a vote in the Senate only when senators are evenly divided. The House of Representatives has six non-voting members. The sitting of a Congress is for a two-year term, at present, beginning every other January. Elections are held every even-numbered year on Election Day. The members of the House of Representatives are elected for the two-year term of a Congress. The Reapportionment Act of 1929 establishes that there be 435 representatives and the Uniform Congressional Redistricting Act requires ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerald Ford
Gerald Rudolph Ford Jr. ( ; born Leslie Lynch King Jr.; July 14, 1913December 26, 2006) was an American politician who served as the 38th president of the United States from 1974 to 1977. He was the only president never to have been elected to the office of president or vice president as well as the only president to date from Michigan. He previously served as the leader of the Republican Party in the House of Representatives, and was appointed to be the 40th vice president in 1973. When President Richard Nixon resigned in 1974, Ford succeeded to the presidency, but was defeated for election to a full term in 1976. Born in Omaha, Nebraska, and raised in Grand Rapids, Michigan, Ford attended the University of Michigan, where he was a member of the school's football team, winning two national championships. Following his senior year, he turned down offers from the Detroit Lions and Green Bay Packers, instead opting to go to Yale Law School. After the attack on Pearl Harbor, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Nixon
Richard Milhous Nixon (January 9, 1913April 22, 1994) was the 37th president of the United States, serving from 1969 to 1974. A member of the Republican Party, he previously served as a representative and senator from California and was the 36th vice president from 1953 to 1961 under President Dwight D. Eisenhower. His five years in the White House saw reduction of U.S. involvement in the Vietnam War, détente with the Soviet Union and China, the first manned Moon landings, and the establishment of the Environmental Protection Agency and Occupational Safety and Health Administration. Nixon's second term ended early, when he became the only president to resign from office, as a result of the Watergate scandal. Nixon was born into a poor family of Quakers in a small town in Southern California. He graduated from Duke Law School in 1937, practiced law in California, then moved with his wife Pat to Washington in 1942 to work for the federal government. After active duty ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spiro Agnew
Spiro Theodore Agnew (November 9, 1918 – September 17, 1996) was the 39th vice president of the United States, serving from 1969 until his resignation in 1973. He is the second vice president to resign the position, the other being John C. Calhoun in 1832. Agnew was born in Baltimore to a Greeks, Greek immigrant father and an American mother. He attended Johns Hopkins University and graduated from the University of Baltimore School of Law. He worked as an aide to U.S. Representative James Devereux before he was appointed to the Baltimore County Board of Zoning Appeals in 1957. In 1962, he was elected Baltimore County Executive. In 1966, Agnew was elected Governor of Maryland, defeating his Democratic Party (United States), Democratic opponent George P. Mahoney and independent candidate Hyman A. Pressman. At the 1968 Republican National Convention, Richard Nixon asked Agnew to place his name in nomination, and named him as running mate. Agnew's centrist reputation interes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1972 United States Presidential Election
The 1972 United States presidential election was the 47th quadrennial presidential election. It was held on Tuesday, November 7, 1972. Incumbent Republican President Richard Nixon defeated Democratic Senator George McGovern of South Dakota. Until the 1984 election, this was the largest margin of victory in the Electoral College in a U.S. presidential election, and as of 2022, it remains the last time a presidential candidate captured more than 60% of the popular vote. It was also the first presidential election that would see California move ahead of New York in each state's number of electoral votes, a gap that has since widened. Nixon swept aside challenges from two Republican congressmen in the 1972 Republican primaries to win renomination. McGovern, who had played a significant role in changing the Democratic nomination system after the 1968 election, mobilized the anti–Vietnam War movement and other liberal supporters to win his party's nomination. Among the candida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1968 United States Presidential Election
The 1968 United States presidential election was the 46th quadrennial presidential election, held on Tuesday, November 5, 1968. The Republican nominee, former vice president Richard Nixon, defeated the Democratic nominee, incumbent vice president Hubert Humphrey, and the American Independent Party nominee, former Alabama governor George Wallace. Incumbent president Lyndon B. Johnson had been the early front-runner for the Democratic Party's nomination, but he withdrew from the race after only narrowly winning the New Hampshire primary. Eugene McCarthy, Robert F. Kennedy, and Humphrey emerged as the three major candidates in the Democratic primaries, until Kennedy was assassinated. Humphrey edged out anti-Vietnam war candidate McCarthy to win the Democratic nomination, sparking numerous anti-war protests. Nixon entered the Republican primaries as the front-runner, defeating liberal New York governor Nelson Rockefeller, conservative governor of California Ronald Reagan, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1964 United States Presidential Election
The 1964 United States presidential election was the 45th quadrennial United States presidential election, presidential election. It was held on Tuesday, November 3, 1964. Incumbent Democratic Party (United States), Democratic President of the United States, United States President Lyndon B. Johnson defeated Barry Goldwater, the Republican Party (United States), Republican nominee, in a Landslide victory, landslide. With 61.1% of the popular vote, Johnson won the List of United States presidential elections by popular vote margin, largest share of the popular vote of any candidate since the largely uncontested 1820 United States presidential election, 1820 election, in which no candidate of either party has been able to match or surpass. Johnson took office on November 22, 1963 and emphasized the continuation of his assassinated predecessor, John F. Kennedy. He easily defeated a Democratic Party presidential primaries, 1964, primary challenge by Governor George Wallace of Alabama, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Electoral College
The United States Electoral College is the group of presidential electors required by the Constitution to form every four years for the sole purpose of appointing the president and vice president. Each state and the District of Columbia appoints electors pursuant to the methods described by its legislature, equal in number to its congressional delegation (representatives and senators). Federal office holders, including senators and representatives, cannot be electors. Of the current 538 electors, an absolute majority of 270 or more ''electoral votes'' is required to elect the president and vice president. If no candidate achieves an absolute majority there, a contingent election is held by the United States House of Representatives to elect the president, and by the United States Senate to elect the vice president. The states and the District of Columbia hold a statewide or districtwide popular vote on Election Day in November to choose electors based upon how they have pled ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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