A screw thread, often shortened to thread, is a helical structure. It is a ridge wrapped around a cylinder or cone in the form of a helix, with the former being called a "straight" thread and the latter called a "tapered" thread.
The tightening of a nut to a bolt is like driving a wedge into a gap until it sticks through friction and plastic deformation (how the surfaces of the two objects slightly squash together).
A screw thread is one of the six simple machines which give mechanical advantage.
The mechanical advantage of a screw thread depends on its "lead", which is the linear distance the screw travels in one turn or revolution.
Planomicrobium glaciei
Planomicrobium glaciei is a species of bacteria. The cells are first coccoid. After some time they change to rods. The bacterium use the aerobic respiration with oxygen. The bacterium does not form endospores. It belongs to the gram-positive Firmicutes.
South Magnetic Pole
The South Magnetic Pole is the point on the southern hemisphere where the magnetic lines are directly pointing upward. In other words, if there were a magnet inside the earth axis (from north to south), the South Magnetic pole would be at its southern end. Because the magnetic field of the Earth changes, the exact location of ths pole does as well., placing it off the coast of Antarctica, between Adelie Land and Wilkes Land. In 2015 it lies at (est). That point lies outside the Antarctic Circle. Due to polar drift, the pole is moving northwest by about 10 to 15 kilometers per year. Its current distance from the actual Geographic South Pole is approximately 2860 km. The nearest permanent science station is Dumont d'Urville Station. Wilkes Land contains a large gravitational mass concentration.
1915 Football Championship Paranaense
The 1915 Football Paranaense Championship (in Portuguese: Campeonato Paranaense de Futebol de 1915) was the first championship edition of the Brazilian state of Paraná and southern Brazil.
The winner this year was the "International Football Club". It was a football club of Curitiba, extinct since 1924.
May 23 - International 2-0 America
International Foot-Ball Club
Robert Rietti
Robert Rietti, born Lucio Rietti and usually credited as Robert Rietty (8 February 1923 – 3 April 2015), was a British-born Italian actor, director and playwright. He was knighted by the Italian government.
Rietti died on 3 April 2015, aged 92
Jaroslav Holík
Jaroslav Holík (; August 3, 1942 – April 17, 2015) was a Czech professional ice hockey coach and former player.
Holik played in the Czechoslovak Extraliga for Dukla Jihlava. He won a bronze medal at the 1972 Winter Olympics in Sapporo. He was also successful at the Ice Hockey World Championships, winning gold at the 1972 World Ice Hockey Championships in Prague, silver at the 1965 World Ice Hockey Championships in Tampere and 1966 World Ice Hockey Championships in Ljubljana, and bronze at the 1969 World Ice Hockey Championships, 1970 World Ice Hockey Championships, both in Stockholm, and 1973 World Ice Hockey Championships in Moscow.
Mariano Gago
José Mariano Rebelo Pires Gago (16 May 1948 – 17 April 2015) was a Portuguese electrical engineer and politician for the Socialist Party. He served as the Minister for Science and Technology from 28 October 1995 to 6 April 2002. He also served as the Ministry of Science, Technology and Higher Education from 21 March 2005 to 21 June 2011.
Gago was born in Lisbon. He studied at universities in Lisbon and Paris. He was married and had a daughter.
Gago died a sudden cardiac death on 17 April 2015 in Lisbon. He was 66.
Alfred Eick
Alfred Eick (9 March 1916 – 12 April 2015) was a German U-boat commander for Nazi Germany during World War II. He commanded the attacks on at least eleven ships between 1943 and 1945. He was given the Knight's Cross of the Iron Cross.
Eick was born in Essen, Rhine Province, then-German Empire. He was also an accountant.
Eick died on 12 April 2015 in Bielefeld, North Rhine-Westphalia, aged 99.
A’Lelia Bundles
A'Lelia Bundles (born June 7, 1952) is an African-American journalist and television executive. She is also an author and Emmy Award-winning producer.
Bundles was named after A'Lelia Walker (1885–1931). Walker was her great-grandmother. Walker was also the daughter of entrepreneur and philanthropist Madam C. J. Walker. She graduated in 1970 from North Central High School. In 1974 Bundles graduated magna cum laude from Radcliffe College. She was inducted into Harvard's Alpha Iota chapter of the Phi Beta Kappa Society. Bundles received a master's degree from the Columbia University Graduate School of Journalism in 1976.
During her senior year at Harvard, Bundles began working at as a news anchor for WTLC-FM. After completing her master's degree she went to work for NBC News as a producer. Bundles was assigned to the New York, Houston and Atlanta bureaus. Bundles produced The Today Show and NBC Nightly News with Tom Brokaw. She also was a producer in Washington, DC for two of NBC's magazine programs. They were co-anchored by Connie Chung and Roger Mudd during the 1980s. In 1989 Bundles went to work at ABC News. She was the bureau chief in Washington, DC. She was the producer of ABC's World News Tonight with Peter Jennings. Bundles was also the chair of a diversity council appointed to advise ABC News president David Westin.
Urban heat island
An urban heat island, or UHI, is what happens when a city is warmer than the area around it. It happens because things in cities like concrete take longer to give off heat than things like trees, which are common outside of cities. The urban heat island effect is stronger at night and when there is not much wind. Cities can be 3°C warmer than nearby countryside.
In country areas, a large part of the incoming solar energy goes to evaporate water from vegetation and soil. But cities have less vegetation and soil. In cities, most of the sun’s energy is absorbed by urban building and asphalt paving. During warm daylight hours, there is less evaporative cooling in cities than in country areas. So, surface temperatures rise higher in cities than in country areas.
Also, vehicles, factories, and industrial and domestic heating and cooling units give off more heat in cities. This problem is growing. This effect causes the city to become 2 to 10 F (1 to 6 C) warmer than surrounding rural areas.
Thunderbolt and Lightfoot
Thunderbolt and Lightfoot is a 1974 American crime comedy-drama movie. Clint Eastwood and Jeff Bridges play the title characters. This was the first movie directed by Michael Cimino. Jeff Bridges was nominated for an Academy Award for Best Supporting Actor. This was his second nomination. This movie was released on September 2, 1974. Its reviews were good.
Izzat Ibrahim al-Douri
Izzat Ibrahim al-Douri ( "‘Izzat Ibrāhīm ad-Dūrī"; 1 July 1942 – 26 October 2020) was an Iraqi general and a commander of the Army of the Men of the Naqshbandi Order. He was an Iraqi military commander and was vice chairman of the Iraqi Revolutionary Command Council until the 2003 U.S.-led invasion of Iraq. He was second in command of Iraq after Saddam's sons.
Between 1979 to 2003, he was the Vice President of Iraq during the Saddam Hussein regime.
Douri was born in Ad-Dawr, Saladin Province. He was a Sufi Muslim.
Douri was apparently killed in a car bombing on 17 April 2015 in Tikrit, aged 72 but DNA tests failed to confirm his death. A year later, he appeared in a video sent to the press.
Douri died on 26 October 2020 in Iraq from leukemia, aged 78.
Homo (disambiguation)
Homo is the taxonomic genus that includes modern humans ("Homo sapiens sapiens").
Homo may also refer to:
Nintendomagasinet