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Leon Theremin
Lev Sergeyevich Termen ( 18963 November 1993), better known as Leon Theremin, was a Russian inventor, most famous for his invention of the theremin, one of the first electronic musical instruments and the first to be mass-produced. He also worked on early television research. His secret listening device, " The Thing", hung for seven years in plain view in the United States ambassador's Moscow office and enabled Soviet agents to eavesdrop on secret conversations. Early life Leon Theremin was born in Saint Petersburg, Russian Empire in 1896. His father was Sergei Emilievich Theremin, of French Huguenot descent. His mother was Yevgenia Antonova Orzhinskaya and of German ancestry. He had a sister named Helena. In the seventh grade of his high school, in front of an audience of students and parents, he demonstrated various optical effects using electricity. By the age of 17 he was in his last year of high school, had his own laboratory at home for experimenting with high-frequenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lev Termen Playing - Cropped
Lev or LEV may refer to: People and fictional characters *Lev (given name) * Lev (surname) Places * Lev, Azerbaijan, a village * Lev (crater), a tiny lunar crater Religion *an abbreviation for Leviticus, the third book of the Hebrew Bible and the Torah *Lay eucharistic visitor, an extraordinary minister of Holy Communion approved by a church (usually Episcopalian or Lutheran) to bring Communion to the homebound *Libreria Editrice Vaticana, the Vatican Publishing House Transportation * Leyland Experimental Vehicle, a type of British experimental railbus *Light electric vehicle, an electric bicycle *Low emission vehicle, a motor vehicle that emits relatively low levels of motor vehicle emissions *Lunar Excursion Vehicle, an early name for the Apollo Lunar Module Political and other * Lesser evil voting (LEV) *Lev (political party), a now-defunct political party in Israel *LEV (cable system), a submarine cable system linking countries in the eastern Mediterranean *''Lev!'', a Sw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fluorescence Spectroscopy
Fluorescence spectroscopy (also known as fluorimetry or spectrofluorometry) is a type of electromagnetic spectroscopy that analyzes fluorescence from a sample. It involves using a beam of light, usually ultraviolet light, that excites the electrons in molecules of certain compounds and causes them to emit light; typically, but not necessarily, visible light. A complementary technique is absorption spectroscopy. In the special case of single molecule fluorescence spectroscopy, intensity fluctuations from the emitted light are measured from either single fluorophores, or pairs of fluorophores. Devices that measure fluorescence are called fluorometers. Theory Molecules have various states referred to as energy levels. Fluorescence spectroscopy is primarily concerned with electronic and vibrational states. Generally, the species being examined has a ground electronic state (a low energy state) of interest, and an excited electronic state of higher energy. Within each of these ele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Empire
The German Empire (),; ; World Book, Inc. ''The World Book dictionary, Volume 1''. World Book, Inc., 2003. p. 572. States that Deutsches Reich translates as "German Realm" and was a former official name of Germany. also referred to as Imperial Germany, the Second Reich or simply Germany, was the period of the German Reich; . from the unification of Germany in 1871 until the German revolution of 1918–1919, November Revolution in 1918, when the German Reich changed its form of government from a monarchy to a Weimar Republic, republic. The German Empire consisted of States of the German Empire, 25 states, each with its own nobility: four constituent Monarchy, kingdoms, six Grand duchy, grand duchies, five Duchy, duchies (six before 1876), seven Principality, principalities, three Free imperial city, free Hanseatic League, Hanseatic City-state, cities, and Alsace–Lorraine, one imperial territory. While Prussia was one of four kingdoms in the realm, it contained about two-thirds ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burglar Alarm
A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary (theft) or property damage, as well as against intruders. Examples include personal systems, neighborhood security alerts, car alarms, and prison alarms. Some alarm systems serve a single purpose of burglary protection; combination systems provide Fire alarm system, fire and intrusion protection. Intrusion-alarm systems are combined with closed-circuit television surveillance (CCTV) systems to record intruders' activities and interface to access control systems for electrically locked doors. There are many types of security systems. Homeowners typically have small, self-contained noisemakers. These devices can also be complicated, multirole systems with computer and network surveillance, computer monitoring and control. It may even include a two-way voice which allows communication between the pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ivan Pavlov
Ivan Petrovich Pavlov (, ; 27 February 1936) was a Russian and Soviet experimental neurologist and physiologist known for his discovery of classical conditioning through his experiments with dogs. Pavlov also conducted significant research on the physiology of digestion, for which he was awarded the Nobel Prize in Physiology or Medicine in 1904. Education and early life Pavlov was born the first of ten children, in Ryazan, Russian Empire. His father, Peter Dmitrievich Pavlov (1823–1899), was a village Russian Orthodox priest. His mother, Varvara Ivanovna Uspenskaya (1826–1890), was a homemaker. As a child, Pavlov willingly participated in house duties such as doing the dishes and taking care of his siblings. He loved to garden, ride his bicycle, row, swim, and play gorodki; he devoted his summer vacations to these activities. Although able to read by the age of seven, Pavlov did not begin formal schooling until he was 11 years old, due to serious injuries he had sustained ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
X-ray Crystallography
X-ray crystallography is the experimental science of determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to Diffraction, diffract in specific directions. By measuring the angles and intensities of the X-ray diffraction, a crystallography, crystallographer can produce a three-dimensional picture of the density of electrons within the crystal and the positions of the atoms, as well as their chemical bonds, crystallographic disorder, and other information. X-ray crystallography has been fundamental in the development of many scientific fields. In its first decades of use, this method determined the size of atoms, the lengths and types of chemical bonds, and the atomic-scale differences between various materials, especially minerals and alloys. The method has also revealed the structure and function of many biological molecules, including vitamins, drugs, proteins and nucleic acids such as DNA. X-ray crystall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Max Laue
Max Theodor Felix von Laue (; 9 October 1879 – 24 April 1960) was a German physicist who received the Nobel Prize in Physics in 1914 "for his discovery of the diffraction of X-rays by crystals". In addition to his scientific endeavors with contributions in optics, crystallography, quantum theory, superconductivity, and the theory of relativity, Laue had a number of administrative positions which advanced and guided German scientific research and development during four decades. A strong objector to Nazism, he was instrumental in re-establishing and organizing German science after World War II. Biography Early years Laue was born in Pfaffendorf, now part of Koblenz, Germany, to Julius Laue and Minna Zerrenner. In 1898, after passing his ''Abitur'' in Strassburg, he began his compulsory year of military service, after which in 1899 he started to study mathematics, physics, and chemistry at the University of Strassburg, the University of Göttingen, and the Ludwig Maximilian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ioffe Institute
The Ioffe Physical-Technical Institute of the Russian Academy of Sciences (for short, Ioffe Institute, ) is one of Russia's largest research centers specialized in physics and technology. The institute was established in 1918 in Petrograd (now St. Petersburg) and run for several decades by Abram Ioffe. The institute is a member of the Russian Academy of Sciences. As of June 2024 the Ioffe Institute employed 1977 individuals including both scientific and non-scientific staff. Present structure of the institute As of 2019, the Ioffe institute employed about 1500 people, around 1000 of whom were scientific researchers (including 560 with a PhD degree and 250 with a Doktor Nauk degree). Most of the research staff members are top graduates of the St. Petersburg (former Leningrad) universities. From 2013 until mid-May 2018 the Ioffe institute was under formal jurisdiction of the Federal Agency for Scientific Organizations (FASO Russia), now it is under jurisdiction of the established ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nikolai Nikolayevich Yudenich
Nikolai Nikolayevich Yudenich ( Russian: Николай Николаевич Юденич; – 5 October 1933) was a commander of the Russian Imperial Army during World War I. He was a leader of the anti-communist White movement in northwestern Russia during the Civil War. Early life Yudenich was born in Moscow, where his father was a minor court official. Yudenich graduated from the Alexandrovsky Military College in 1881 and the General Staff Academy in 1887. He first served with the Life Guards Regiment in Lithuania from November 1889 to December 1890. In January 1892, he was transferred to the Turkestan Military District and was promoted to lieutenant colonel in April 1892. He was a member of the Pamir Expedition in 1894 and was promoted to colonel in 1896. From September 20, 1900, Yudenich served on the staff of the 1st Turkestan Rifle Brigade. In 1902, Yudenich was appointed commander of the 18th Infantry Regiment, which he continued to command during the Russo-Japan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Movement
The White movement,. The old spelling was retained by the Whites to differentiate from the Reds. also known as the Whites, was one of the main factions of the Russian Civil War of 1917–1922. It was led mainly by the Right-wing politics, right-leaning and Conservatism, conservative officers of the Russian Empire, while the Bolsheviks who led the October Revolution in Russia, also known as the ''Reds'', and their supporters, were regarded as the main enemies of the Whites. It operated as a loose system of governments and administrations and military formations collectively referred to as the White Army, or the White Guard. Although the White movement included a variety of political opinions in Russia opposed to the Bolsheviks, from the republican-minded liberals through monarchists to the ultra-nationalist Black Hundreds, and did not have a universally-accepted leader or doctrine, the main force behind the movement were the conservative officers, and the resulting movement shared ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russian Civil War
The Russian Civil War () was a multi-party civil war in the former Russian Empire sparked by the 1917 overthrowing of the Russian Provisional Government in the October Revolution, as many factions vied to determine Russia's political future. It resulted in the formation of the Russian Soviet Federative Socialist Republic, Russian Socialist Federative Soviet Republic and later the Soviet Union in most of its territory. Its finale marked the end of the Russian Revolution, which was one of the key events of the 20th century. The List of Russian monarchs, Russian monarchy ended with the abdication of Nicholas II, Tsar Nicholas II during the February Revolution, and Russia was in a state of political flux. A tense summer culminated in the October Revolution, where the Bolsheviks overthrew the Russian Provisional Government, provisional government of the new Russian Republic. Bolshevik seizure of power was not universally accepted, and the country descended into a conflict which beca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tsarskoye Selo
Tsarskoye Selo (, , ) was the town containing a former residence of the Russian House of Romanov, imperial family and visiting nobility, located south from the center of Saint Petersburg. The residence now forms part of the Pushkin, Saint Petersburg, town of Pushkin. Tsarskoye Selo forms one of the World Heritage Site Historic Centre of Saint Petersburg and Related Groups of Monuments, Saint Petersburg and Related Groups of Monuments. The town bore the name Tsarskoye Selo until 1918. The new Bolshevik government of Soviet Russia renamed it as Detskoye Selo (), which it held from 1918–1937. At that time, it was renamed under Josef Stalin, Stalin's government as Pushkin () after Alexander Pushkin, the famous Russian poet and writer. It is still known by that name. History The area of Tsarskoye Selo, once part of Swedish Ingria, first became a Russian royal/imperial residence in the early 18th century as an estate of the Empress-consort Catherine (later Empress-regnant as Cath ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
