Polybutadiene is a polymer, that is mainly used as synthetic rubber: It is made from the monomer 1,3-Butadiene. Polybutadiene has a high resistance to wear. About 70% of the production is used for tires. About 25% is used as an additive to improve the toughness (impact resistance) of plastics such as polystyrene and acrylonitrile butadiene styrene (ABS). Polybutadiene rubber accounted for about a quarter of total global consumption of synthetic rubbers in 2012. It is also used to manufacture golf balls, various elastic objects and to coat or encapsulate electronic assemblies, offering high electrical resistivity.
Morris Halle
Morris Halle (; July 23, 1923 – April 2, 2018) was a Latvian-American linguist. She was a Institute Professor. He later became professor emeritus, of linguistics at the Massachusetts Institute of Technology. He was best known for his pioneering work with Noam Chomsky and Fred Lukoff and for his "The Sound Pattern of English" (1968) work with Chomsky.
Halle died in Cambridge, Massachusetts on April 2, 2018 at the age of 94.
Lill-Babs
Barbro Margareta Svensson, known as Lill-Babs (9 March 1938 – 3 April 2018), was a Swedish singer, actress and television presenter. She represented Sweden in the Eurovision Song Contest in 1961 in Cannes with the song "April, april". She was also well-known for the song "Är du kär i mej ännu Klas-Göran?".
Lill-Babs died of heart failure complicated by cancer in Stockholm on 3 April 2018 at the age of 80.
Arrigo Petacco
Arrigo Petacco (7 August 1929 – 3 April 2018) was an Italian writer, historian and journalist. He was born in Castelnuovo Magra, Italy. He was special envoy, editor-in-chief and executive director of "La Nazione" and "La Storia Illustrata", and author of the homonymous monthly television program on the RAI.
In 1983 he won the Saint Vincent award for journalism and in 2006 received the Capo d'Orlando prize even for journalism.
Petacco died in Porto Venere, Italy on 3 April 2018 of liver cancer at the age of 88.
Consummation of marriage
The first time married people have sexual intercourse with each other, after their marriage is called consummation. One of the reasons why people get married is to have children. Many countries (and jurisdictions) have laws so that people who do not have sex with each other can have their marriage annulled (undone).
Tessa Thompson
Tessa Lynn Thompson (born October 3, 1983) is an American actress. She is of Afro-Panamanian, English, German, Irish, Mexican and Scottish descent. She was known for her role in the 2009 indie movie "Mississippi Damned". In movie, she starred as Nyla Adrose in the drama "For Colored Girls" (2010), civil rights activist Diane Nash in the historical drama "Selma" (2014), Bianca in the sports drama "Creed" (2015), and as Valkyrie in the superhero movie "" (2017) and in "" (2018).
On television, Thompson starred as Jackie Cook in the mystery drama "Veronica Mars" (2005–2006), Sara Freeman in the period crime drama "Copper" (2012–2013), and Charlotte Hale in the HBO science-fiction thriller series "Westworld" (2016–present).
Sara Gjoni
Sara Gjoni (born in Tirana) a is model and beauty pageant contestant. She won the title of Miss Albania in 2011 and represented Albania at Miss Model of the World in 2011. She won the title Miss Bikini in 2011. She also won title miss model of the best talent in dance.
Eugenio Beltrami
Eugenio Beltrami (16 November 1835 18 February 1900) was an Italian mathematician notable for his work on non-Euclidean geometry, electricity, and magnetism.
He was born in Cremona in Lombardy, then a part of the Austrian Empire, and now part of Italy. Beltrami first began studying mathematics at University of Pavia in 1853, but was forced to discontinue his studies in 1856 because of financial hardship. He was appointed to the University of Bologna as a professor in 1862, the year he published his first paper. Beltrami later taught at universities in Pisa, Rome and Pavia. He died in Rome in 1900.
In 1868, (in "Essay on an interpretation of non-Euclidean geometry") Beltrami gave the first model of hyperbolic geometry. In Beltrami's model, lines of hyperbolic geometry are represented by geodesics on the pseudosphere. Thus, Beltrami provided the first proof that Euclid's parallel postulate could not be derived from the other axioms of Euclidean geometry.
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Evert Kroon
Evert Gerrit Kroon (September 9, 1946 – April 2, 2018) was a Dutch water polo goalkeeper. He participated in three Summer Olympics, starting in 1968. After two seventh-place finishes Kroon won the bronze medal at the 1976 Summer Olympics. He was born in Hilversum, North Holland.
Kroon died on April 2, 2018 in Amsterdam at the age of 71.
Carlos Alvarado Quesada
Carlos Andrés Alvarado Quesada (San José, January 14, 1980) is a Costa Rican writer, journalist, political scientist and politician. He is the President of Costa Rica. He served as Minister of Labor and Social Security.
On April 1, 2018 Alvarado won the presidential election by 61% after promising to support gay marriage.
Abel Pacheco
Abel Pacheco de la Espriella ( ; born 22 December 1933) is a Costa Rican politician and psychiatrist. He was President of Costa Rica between 2002 and 2006. He was a member of the Social Christian Unity Party "(Partido Unidad Social Cristiana" – PUSC).
Miguel Ángel Rodríguez
Miguel Ángel Rodríguez Echeverría (born 9 January 1940) is a Costa Rican economist, lawyer, businessman and politician. He served as President of Costa Rica from 1998 to 2002 and was briefly Secretary General of the Organization of American States (OAS) in 2004.
He stepped down and returned to his country to face allegations of financial wrongdoing during his presidential tenure in Costa Rica. On 27 April 2011 he was sentenced to 5 years in prison for corruption.
In December 2012, he was exonerated by an appeals court.
Anna Chennault
Anna Chennault, born Chen Xiangmei (June 23, 1925 – March 30, 2018), also known as Anna Chan Chennault or Anna Chen Chennault, was an American war correspondent and known Republican member of the US China Lobby. She was married to U.S. WWII aviator Claire Lee Chennault. She was born in Peking, China.
In January 1981, Chennault visited Beijing to meet the Chinese leader Deng Xiaoping, as a private citizen, but in fact as an unofficial diplomat representing the incoming Republican president Ronald Reagan, who was due to be sworn in as president on 20 January 1981.
Chennault died in Washington, D.C. on March 30, 2018 of complications from a stroke at the age of 94.
Claire Lee Chennault
Claire Lee Chennault (September 6, 1893 – July 27, 1958) was an American military aviator. He was best known for his leadership of the "Flying Tigers" and the Republic of China Air Force in World War II.
Chennault was twice married and had a total of ten children. From 1947 until his death in 1958, he married Chinese reporter Anna Chennault.
Chennault was promoted to lieutenant general in the U.S. Air Force on July 18, 1958, nine days before his death on July 27, at the Ochsner Foundation Hospital in New Orleans. He died of lung cancer in New Orleans, Louisiana on July 27, 1958 at the age of 64.
YouTube headquarters shooting
Just before 1 p.m. PDT on April 3, 2018, an active shooter was reported at YouTube headquarters in San Bruno, California, United States. The suspect, armed with a handgun, approached an outdoor patio and opened fire. Three people were shot (including one who sustained critical injuries); an other person was injured while fleeing the building. Police reported that the shooter, a woman, died from a self-inflicted gunshot wound.
Two law enforcement sources told the Associated Press that a man who was wounded in the attack is believed to be the shooter's boyfriend, and said that the shooting is believed to have been motivated by a domestic dispute.
The shooter was Nasim Najafi Aghdam, a 39 year old woman. She died of a self-inflicted gunshot wound.
Commerce, Texas