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Evgeny Zavoisky
Yevgeny Konstantinovich Zavoisky (russian: Евгений Константинович Завойский; September 28, 1907 – October 9, 1976) was a Soviet physicist known for discovery of electron paramagnetic resonance in 1944. He likely observed nuclear magnetic resonance in 1941, well before Felix Bloch and Edward Mills Purcell, but dismissed the results as not reproducible. Zavoisky is also credited with design of luminescence camera for detection of nuclear processes in 1952 and discovery of magneto-acoustic resonance in plasma in 1958. Early years Zavoisky was born in 1907 in Mohyliv-Podilskyi, a town in the south of Russian Empire (now in Vinnytsia Oblast, Ukraine). His father Konstantin Ivanovich was a military doctor and mother Elizaveta Nikolaevna was trained as a teacher. In 1910, Zavoisky family moved to Kazan – a major Russian university city – for the sake of better education and well-being of their five children. There, Konstantin Ivanovich obtained a respect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mohyliv-Podilskyi
Mohyliv-Podilskyi (, , , ) is a city in the Mohyliv-Podilskyi Raion of the Vinnytsia Oblast, Ukraine. Administratively, Mohyliv-Podilskyi is incorporated as a town of regional significance. It also serves as the administrative center of Mohyliv-Podilskyi Raion, one of twenty-seven districts of Vinnytsia Oblast, though it is not a part of the district. It is located in the historic region of Podolia, on the border with Bessarabia, Moldova, along the left bank of the Dniester river. On the opposite side of the river lies the Moldovan town of Otaci, and the two municipalities are connected to each other by a bridge. Population: History Polish period The first mention of the town dates from 1595. The owner of the town, Moldavian hospodar Ieremia Movilă (from which the name Mohyliv, ''Moghilău/Movilău'' in Romanian) bestowed it as a dowry gift to his daughter, who married into the Potocki family of Polish nobility. At that time, the groom named the town Movilǎu in honor of h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vinnytsia Oblast
Vinnytsia Oblast ( uk, Ві́нницька о́бласть, translit=Vinnytska oblast; ; also referred to as Vinnychchyna — uk, Ві́нниччина) is an oblast of western and southwestern Ukraine. Its administrative center is Vinnytsia. The oblast has a population of History Vinnytsia Oblast, first established on February 27, 1932, originally comprised raions (regions) of the following former okruhas of Ukraine (districts of Soviet Ukraine): * Uman Okruha * Berdychiv Okruha * Vinnytsia Okruha * Mohyliv Okruha * Tulchyn Okruha * Shepetivka Okruha * Proskuriv Okruha * Kamianets Okruha In 1935 bordering territories of the oblast were transformed into Soviet border districts: Shepetivka Okrug, Proskuriv Okrug, and Kamianets Okrug. In 1937 the Kamianets Oblast, based on the border districts, was formed (it later became Khmelnytsky Oblast). During World War II the occupying Axis powers split the territory of Vinnytsia Oblast between the General District Shitomir (Zhyto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calorimetry
In chemistry and thermodynamics, calorimetry () is the science or act of measuring changes in ''state variables'' of a body for the purpose of deriving the heat transfer associated with changes of its state due, for example, to chemical reactions, physical changes, or phase transitions under specified constraints. Calorimetry is performed with a calorimeter. Scottish physician and scientist Joseph Black, who was the first to recognize the distinction between heat and temperature, is said to be the founder of the science of calorimetry. Indirect calorimetry calculates heat that living organisms produce by measuring either their production of carbon dioxide and nitrogen waste (frequently ammonia in aquatic organisms, or urea in terrestrial ones), or from their consumption of oxygen. Lavoisier noted in 1780 that heat production can be predicted from oxygen consumption this way, using multiple regression. The dynamic energy budget theory explains why this procedure is correct. He ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. World War II was a total war that directly involved more than 100 million personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the only two nuclear weapons ever used in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, mostly among civilians. Tens of millions died due to genocides (including the Holocaust), starvation, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nobel Prize In Physics
) , image = Nobel Prize.png , alt = A golden medallion with an embossed image of a bearded man facing left in profile. To the left of the man is the text "ALFR•" then "NOBEL", and on the right, the text (smaller) "NAT•" then "MDCCCXXXIII" above, followed by (smaller) "OB•" then "MDCCCXCVI" below. , awarded_for = Outstanding contributions for humankind in the field of Physics , presenter = Royal Swedish Academy of Sciences , location = Stockholm, Sweden , date = , reward = 9 million Swedish kronor (2017) , year = 1901 , holder_label = Most recently awarded to , holder = Alain Aspect, John Clauser, and Anton Zeilinger , most_awards = John Bardeen (2) , website nobelprize.org, previous = 2021 , year2=2022, main=2022, next=2023 The Nobel Prize in Physics is a yearly award given by the Royal Swedish Academy of Sciences for those who have made the most outstanding contributions for humankind in the field of physics. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physical Review
''Physical Review'' is a peer-reviewed scientific journal established in 1893 by Edward Nichols. It publishes original research as well as scientific and literature reviews on all aspects of physics. It is published by the American Physical Society (APS). The journal is in its third series, and is split in several sub-journals each covering a particular field of physics. It has a sister journal, ''Physical Review Letters'', which publishes shorter articles of broader interest. History ''Physical Review'' commenced publication in July 1893, organized by Cornell University professor Edward Nichols and helped by the new president of Cornell, J. Gould Schurman. The journal was managed and edited at Cornell in upstate New York from 1893 to 1913 by Nichols, Ernest Merritt, and Frederick Bedell. The 33 volumes published during this time constitute ''Physical Review Series I''. The American Physical Society (APS), founded in 1899, took over its publication in 1913 and star ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Beam
A molecular beam is produced by allowing a gas at higher pressure to expand through a small orifice into a chamber at lower pressure to form a beam of particles (atoms, free radicals, molecules or ions) moving at approximately equal velocities, with very few collisions between the particles. Molecular beams are useful for fabricating thin films in molecular beam epitaxy and artificial structures such as quantum wells, quantum wires, and quantum dots. Molecular beams have also been applied as crossed molecular beams. The molecules in the molecular beam can be manipulated by electrical fields and magnetic fields. Molecules can be decelerated in a Stark decelerator or in a Zeeman slower. History The first to study molecular beams were H. Kallmann and F. Reiche who in 1921 were interested in dipole moments and the deflection of beams of polar molecules in an inhomogeneous electric field. Their work inspired indirectly the Stern–Gerlach experiment (1922) that used not molecular beams ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isidor Isaac Rabi
Isidor Isaac Rabi (; born Israel Isaac Rabi, July 29, 1898 – January 11, 1988) was an American physicist who won the Nobel Prize in Physics in 1944 for his discovery of nuclear magnetic resonance, which is used in magnetic resonance imaging. He was also one of the first scientists in the United States to work on the cavity magnetron, which is used in microwave radar and microwave ovens. Born into a traditional Polish-Jewish family in Rymanów, Galicia, Rabi came to the United States as an infant and was raised in New York's Lower East Side. He entered Cornell University as an electrical engineering student in 1916, but soon switched to chemistry. Later, he became interested in physics. He continued his studies at Columbia University, where he was awarded his doctorate for a thesis on the magnetic susceptibility of certain crystals. In 1927, he headed for Europe, where he met and worked with many of the finest physicists of the time. In 1929, Rabi returned to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semen Altshuler
Semen Alexandrovich Altshuler (also Altshuller, Al'tshuler or Al'shuller; german: Altschuler; russian: Семён Александрович Альтшулер; September 24, 1911 – January 24, 1983) was a Soviet physicist known for his work in resonance spectroscopy and in particular for theoretical prediction of acoustic paramagnetic resonance in 1952.Kochelaev p.100 Early years Altshuler was born in 1911 in Vitebsk, now a city in Belarus, near the border with Russia. He finished school in Nizhny Novgorod and later moved to Kazan, where he spent most of his life. In 1928, he entered the physics faculty of the Kazan University aiming to study theoretical physics. He graduated in 1932 and obtained a post-graduate scholarship, but had to change university due to the scholarship rules. He moved to Moscow to study with Igor Tamm whom he admired for his books on electricity and magnetism. In 1934, Altshuler and Tamm published a famous article which predicted the existence of the magn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regenerative Circuit
A regenerative circuit is an amplifier circuit that employs positive feedback (also known as regeneration or reaction). Some of the output of the amplifying device is applied back to its input so as to add to the input signal, increasing the amplification. One example is the Schmitt trigger (which is also known as a regenerative comparator), but the most common use of the term is in RF amplifiers, and especially regenerative receivers, to greatly increase the gain of a single amplifier stage. The regenerative receiver was invented in 1912 and patented in 1914US Patent 1113149A, Edwin H. Armstrong, Wireless receiving system', filed October 29, 1913, granted October 6, 1914 by American electrical engineer Edwin Armstrong when he was an undergraduate at Columbia University. It was widely used between 1915 and World War II. Advantages of regenerative receivers include increased sensitivity with modest hardware requirements, and increased selectivity because the Q of the tuned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint Petersburg
Saint Petersburg ( rus, links=no, Санкт-Петербург, a=Ru-Sankt Peterburg Leningrad Petrograd Piter.ogg, r=Sankt-Peterburg, p=ˈsankt pʲɪtʲɪrˈburk), formerly known as Petrograd (1914–1924) and later Leningrad (1924–1991), is the second-largest city in Russia. It is situated on the Neva River, at the head of the Gulf of Finland on the Baltic Sea, with a population of roughly 5.4 million residents. Saint Petersburg is the fourth-most populous city in Europe after Istanbul, Moscow and London, the most populous city on the Baltic Sea, and the world's northernmost city of more than 1 million residents. As Russia's Imperial capital, and a historically strategic port, it is governed as a federal city. The city was founded by Tsar Peter the Great on 27 May 1703 on the site of a captured Swedish fortress, and was named after apostle Saint Peter. In Russia, Saint Petersburg is historically and culturally associated with t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kazan Federal University
Kazan (Volga region) Federal University (russian: Казанский (Приволжский) федеральный университет, tt-Cyrl, Казан (Идел буе) федераль университеты) is a public research university located in Kazan, Russia. Founded in 1804 as Imperial Kazan University, astronomer Nikolai Ivanovich Lobachevsky served there as the rector from 1837 until 1876. In 1929, the university was renamed in honour of its student Vladimir Ilyich Ulyanov (Lenin). The university is known as the birthplace of organic chemistry due to works by Aleksandr Butlerov, Vladimir Markovnikov, Aleksandr Arbuzov, and the birthplace of electron spin resonance discovered by Evgeny Zavoisky. In 2011, Kazan University received a federal status. It is also one of 18 Russian universities that were initially selected to participate in the Project 5-100, coordinated by the Government of the Russian Federation and aimed to improve their international competit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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