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Israel Halperin
Israel Halperin, (January 5, 1911 – March 8, 2007) was a Canadian mathematician and social activist. Early life and education Israel Halperin was born in Toronto, Ontario, the son of Russian Jewish immigrants Solomon Halperin and Fanny Lundy. Halperin attended Malvern Collegiate Institute, Victoria University in the University of Toronto, graduated from the University of Toronto in 1932, and later was a graduate student of John von Neumann at Princeton University, where he received his doctorate in mathematics. Early career After completing his doctorate in mathematics at Princeton, Halperin took a faculty position at Queen's University beginning in 1939. Halperin joined the Canadian Army in 1942, serving until 1945 in Ottawa with the Canadian Armament Research and Development Establishment (CARDE). He then returned to Queen's. Arrest and release In February 1946, Halperin was arrested and accused of espionage in Canada, in connection with the defection of Igor Gouzenko, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toronto
Toronto ( ; or ) is the capital city of the Canadian province of Ontario. With a recorded population of 2,794,356 in 2021, it is the most populous city in Canada and the fourth most populous city in North America. The city is the anchor of the Golden Horseshoe, an urban agglomeration of 9,765,188 people (as of 2021) surrounding the western end of Lake Ontario, while the Greater Toronto Area proper had a 2021 population of 6,712,341. Toronto is an international centre of business, finance, arts, sports and culture, and is recognized as one of the most multicultural and cosmopolitan cities in the world. Indigenous peoples have travelled through and inhabited the Toronto area, located on a broad sloping plateau interspersed with rivers, deep ravines, and urban forest, for more than 10,000 years. After the broadly disputed Toronto Purchase, when the Mississauga surrendered the area to the British Crown, the British established the town of York in 1793 and later designat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Army
The Canadian Army (french: Armée canadienne) is the command responsible for the operational readiness of the conventional ground forces of the Canadian Armed Forces. It maintains regular forces units at bases across Canada, and is also responsible for the Army Reserve, the largest component of the Primary Reserve. The Army is headed by the concurrently held Commander of the Canadian Army and Chief of the Army Staff, who is subordinate to the Chief of the Defence Staff. The Army is also supported by 3,000 civilian employees from the civil service. Formed in 1855, as the Active Militia, in response to the threat of the United States to the Province of Canada after the British Garrison left for the Crimean War. This Militia was later split into the Permanent Active Militia and the Non-Permanent Active Militia. Finally, in 1940, an Order in Council was issued to rename the active militias to the Canadian Army. On 1 April 1966, prior to the unification of the Canadian Armed For ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tenure
Tenure is a category of academic appointment existing in some countries. A tenured post is an indefinite academic appointment that can be terminated only for cause or under extraordinary circumstances, such as financial exigency or program discontinuation. Tenure is a means of defending the principle of academic freedom, which holds that it is beneficial for society in the long run if scholars are free to hold and examine a variety of views. By country United States and Canada Under the tenure systems adopted by many universities and colleges in the United States and Canada, some faculty positions have tenure and some do not. Typical systems (such as the widely adopted "1940 Statement of Principles on Academic Freedom and Tenure" of the American Association of University Professors) allow only a limited period to establish a record of published research, ability to attract grant funding, academic visibility, teaching excellence, and administrative or community service. They ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Charles Wallace
Robert Charles Wallace (June 15, 1881 – January 29, 1955) was a Scots-Canadian geologist, educator, and administrator who served as president of the University of Alberta (1928–1936), the principal of Queen's University at Kingston, Queen's University (1936–1951), and the head of the Arctic Institute of North America (1951–1955). Biography Early life and education Robert Charles Wallace was born on June 15, 1881, in the Orkney Islands of Scotland. He completed his secondary education at the Kirkwall Grammar School in Orkney funded by a county scholarship. He went on to earn a Bachelor of Arts, B.A. from the University of Edinburgh in 1901 and a B.Sc. in geology and mathematics from the same institution in 1907, during which time he received Exhibition Scholarship. Wallace left for Germany to pursue graduate studies in geology, obtaining an M.Sc. from the University of Göttingen. He returned to Scotland to finish his graduate work, earning his Ph.D. from Edinburgh in 1912 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis St-Laurent
Louis Stephen St. Laurent (''Saint-Laurent'' or ''St-Laurent'' in French, baptized Louis-Étienne St-Laurent; February 1, 1882 – July 25, 1973) was a Canadian lawyer and politician who served as the 12th prime minister of Canada from 1948 to 1957. Born and raised in southeastern Quebec, St. Laurent was a leading lawyer and a supporter of the Liberal Party of Canada. In December 1941, he entered politics as minister of justice under Prime Minister William Lyon Mackenzie King. In February 1942, he won a by-election in the riding of Quebec East. In September 1946, St. Laurent became secretary of state for external affairs and served in that post until two years later, when he became leader of the Liberal Party and prime minister, succeeding King who retired. St. Laurent carried the party to back-to-back landslide majority governments in the federal elections of 1949 and 1953. The second French Canadian to hold the office, St. Laurent strongly advocated against communism ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Weapons
A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission (fission bomb) or a combination of fission and fusion reactions (thermonuclear bomb), producing a nuclear explosion. Both bomb types release large quantities of energy from relatively small amounts of matter. The first test of a fission ("atomic") bomb released an amount of energy approximately equal to . The first thermonuclear ("hydrogen") bomb test released energy approximately equal to . Nuclear bombs have had yields between 10 tons TNT (the W54) and 50 megatons for the Tsar Bomba (see TNT equivalent). A thermonuclear weapon weighing as little as can release energy equal to more than . A nuclear device no larger than a conventional bomb can devastate an entire city by blast, fire, and radiation. Since they are weapons of mass destruction, the proliferation of nuclear weapons is a focus of international relations policy. Nuclear weapons have been deployed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cipher
In cryptography, a cipher (or cypher) is an algorithm for performing encryption or decryption—a series of well-defined steps that can be followed as a procedure. An alternative, less common term is ''encipherment''. To encipher or encode is to convert information into cipher or code. In common parlance, "cipher" is synonymous with "code", as they are both a set of steps that encrypt a message; however, the concepts are distinct in cryptography, especially classical cryptography. Codes generally substitute different length strings of characters in the output, while ciphers generally substitute the same number of characters as are input. There are exceptions and some cipher systems may use slightly more, or fewer, characters when output versus the number that were input. Codes operated by substituting according to a large codebook which linked a random string of characters or numbers to a word or phrase. For example, "UQJHSE" could be the code for "Proceed to the following ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soviet Union
The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen national republics; in practice, both its government and its economy were highly centralized until its final years. It was a one-party state governed by the Communist Party of the Soviet Union, with the city of Moscow serving as its capital as well as that of its largest and most populous republic: the Russian SFSR. Other major cities included Leningrad (Russian SFSR), Kiev (Ukrainian SSR), Minsk ( Byelorussian SSR), Tashkent (Uzbek SSR), Alma-Ata (Kazakh SSR), and Novosibirsk (Russian SFSR). It was the largest country in the world, covering over and spanning eleven time zones. The country's roots lay in the October Revolution of 1917, when the Bolsheviks, under the leadership of Vladimir Lenin, overthrew the Russian Provisional Government ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Igor Gouzenko
Igor Sergeyevich Gouzenko (russian: Игорь Сергеевич Гузенко ; January 26, 1919 – June 25, 1982) was a cipher clerk for the Soviet embassy to Canada in Ottawa, Ontario, and a lieutenant of the GRU (Main Intelligence Directorate). He defected on September 5, 1945, three days after the end of World War II, with 109 documents on the USSR's espionage activities in the West. This forced Canada's Prime Minister Mackenzie King to call a Royal Commission to investigate espionage in Canada. Gouzenko exposed Soviet intelligence's efforts to steal nuclear secrets as well as the technique of planting sleeper agents. The "Gouzenko Affair" is often credited as a triggering event of the Cold War, with historian Jack Granatstein stating it was "the beginning of the Cold War for public opinion" and journalist Robert Fulford writing he was "absolutely certain the Cold War began in Ottawa". Granville Hicks described Gouzenko's actions as having "awakened the people of N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Defection
In politics, a defector is a person who gives up allegiance to one state in exchange for allegiance to another, changing sides in a way which is considered illegitimate by the first state. More broadly, defection involves abandoning a person, cause, or doctrine to which one is bound by some tie, as of allegiance or duty. This term is also applied, often pejoratively, to anyone who switches loyalty to another religion, sports team, political party, or other rival faction. In that sense, the defector is often considered a traitor by their original side. International politics The physical act of defection is usually in a manner which violates the laws of the nation or political entity from which the person is seeking to depart. By contrast, mere changes in citizenship, or working with allied militia, usually do not violate any law(s). For example, in the 1950s, East Germans were increasingly prohibited from traveling to the western Federal Republic of Germany where they were au ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
