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Artem Alikhanian
Artyom Isaakovich Alikhanian ( hy, Արտեմ Ալիխանյան, russian: Артём Исаакович Алиханьян, 24 June 1908 – 25 February 1978) was a Soviet and Armenian physicist, one of the founders and first director of the Yerevan Physics Institute, a correspondent member of the Academy of Sciences of the Soviet Union (1946), academic of the Armenian National Academy of Sciences. With Pyotr Kapitsa, Lev Landau, Igor Kurchatov, Abram Alikhanov and others, he laid the foundations of nuclear physics in the Soviet Union. He is known as the "father of Armenian physics".Artem Alikhanian: the father of Armenian physics , ''CERN Courier'', Vol. 48, N. 6, 2008, p. 41 Biography Artyom Alikhanian was born in[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elizavetpol
Ganja (; az, Gəncə ) is Azerbaijan's third largest city, with a population of around 335,600.Azərbaycan Respublikası. — 2. Azərbaycan Respublikasının iqtisadi və inzibati rayonları. — 2.4. Azərbaycan Respublikasının iqtisadi və inzibati rayonlarının ərazisi, əhalisinin sayı və sıxlığı, səhifə 66. /Azərbaycanın əhalisi (statistik bülleten) Müəllifi: Azərbaycan Respublikasının Dövlət Statistika Komitəsi. Buraxılışa məsul şəxs: Rza Allahverdiyev. Bakı — 2015, 134 səhifə. The city has been a historic and cultural center throughout most of its existence. It was the capital of the Ganja Khanate until 1804; after Qajar Iran ceded it to the Russian Empire following the Treaty of Gulistan in 1813, it became part of the administrative divisions of the Georgia Governorate, Georgia-Imeretia Governorate, Tiflis Governorate, and Elizavetpol Governorate. Following the dissolution of the Russian Empire and the Transcaucasian Democratic Fed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gyumri
Gyumri ( hy, Գյումրի, ) is an urban municipal community and the second-largest city in Armenia, serving as the administrative center of Shirak Province in the northwestern part of the country. By the end of the 19th century, when the city was known as Alexandropol,; hy, Ալեքսանդրապոլ it became the largest city of Russian-ruled Eastern Armenia with a population above that of Yerevan. The city became renown as a cultural hub, while also carrying significance as a major center of Russian troops during Russo-Turkish wars of the 19th century. The city underwent a tumultuous period during and after World War 1. While Russian forces withdrew from the South Caucasus due to the October Revolution, the city became host to large numbers of Armenian refugees fleeing the Armenian Genocide, in particular hosting 22,000 orphaned children in around 170 orphanage buildings. It was renamed to Leninakan; russian: Ленинакан during the Soviet period and became a major i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Aragats
Mount Aragats ( hy, Արագած, ) is an isolated four-peaked volcano massif in Armenia. Its northern summit, at above sea level, is the highest point of the Lesser Caucasus and Armenia. It is also one of the highest points in the Armenian Highlands. The Aragats massif is surrounded by Kasagh River on the east, Akhurian River on the west, Ararat plain on the south and Shirak plain on the north. The circumference of the massif is around , and covers an area of or around of Armenia's total area. of the massif is located above . Etymology and names According to Armenian tradition, Aragats originates from the words Արա ''Ara'' + գահ ''gah'', which translates to "Ara's throne". Ara refers to the legendary hero Ara the Beautiful. Aragats was mentioned by the early medieval historian Movses Khorenatsi, who in his ''History of Armenia'' claims that the mountain is named after Aramaneak, the son of Hayk, the legendary patriarch of the Armenian people. Aramaneak called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communist Party
A communist party is a political party that seeks to realize the socio-economic goals of communism. The term ''communist party'' was popularized by the title of ''The Manifesto of the Communist Party'' (1848) by Karl Marx and Friedrich Engels. As a vanguard party, the communist party guides the political education and development of the working class (proletariat). As a ruling party, the communist party exercises power through the dictatorship of the proletariat. Vladimir Lenin developed the idea of the communist party as the revolutionary vanguard, when the socialist movement in Imperial Russia was divided into ideologically opposed factions, the Bolshevik faction ("of the majority") and the Menshevik faction ("of the minority"). To be politically effective, Lenin proposed a small vanguard party managed with democratic centralism which allowed centralized command of a disciplined cadre of professional revolutionaries. Once a policy was agreed upon, realizing political goals req ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radioactive Decay
Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay ( ), beta decay ( ), and gamma decay ( ), all of which involve emitting one or more particles. The weak force is the mechanism that is responsible for beta decay, while the other two are governed by the electromagnetism and nuclear force. A fourth type of common decay is electron capture, in which an unstable nucleus captures an inner electron from one of the electron shells. The loss of that electron from the shell results in a cascade of electrons dropping down to that lower shell resulting in emission of discrete X-rays from the transitions. A common example is iodine-125 commonly used in medical settings. Radioactive decay is a stochastic (i.e. random) proce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Positron Annihilation
The positron or antielectron is the antiparticle or the antimatter counterpart of the electron. It has an electric charge of +1 '' e'', a spin of 1/2 (the same as the electron), and the same mass as an electron. When a positron collides with an electron, annihilation occurs. If this collision occurs at low energies, it results in the production of two or more photons. Positrons can be created by positron emission radioactive decay (through weak interactions), or by pair production from a sufficiently energetic photon which is interacting with an atom in a material. History Theory In 1928, Paul Dirac published a paper proposing that electrons can have both a positive and negative charge. This paper introduced the Dirac equation, a unification of quantum mechanics, special relativity, and the then-new concept of electron spin to explain the Zeeman effect. The paper did not explicitly predict a new particle but did allow for electrons having either positive or negative ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gamma Ray
A gamma ray, also known as gamma radiation (symbol γ or \gamma), is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves, typically shorter than those of X-rays. With frequencies above 30 exahertz (), it imparts the highest photon energy. Paul Villard, a French chemist and physicist, discovered gamma radiation in 1900 while studying radiation emitted by radium. In 1903, Ernest Rutherford named this radiation ''gamma rays'' based on their relatively strong penetration of matter; in 1900 he had already named two less penetrating types of decay radiation (discovered by Henri Becquerel) alpha rays and beta rays in ascending order of penetrating power. Gamma rays from radioactive decay are in the energy range from a few kiloelectronvolts (keV) to approximately 8 megaelectronvolts (MeV), corresponding to the typical energy levels in nuclei with reasonably long lif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beta Decay
In nuclear physics, beta decay (β-decay) is a type of radioactive decay in which a beta particle (fast energetic electron or positron) is emitted from an atomic nucleus, transforming the original nuclide to an isobar of that nuclide. For example, beta decay of a neutron transforms it into a proton by the emission of an electron accompanied by an antineutrino; or, conversely a proton is converted into a neutron by the emission of a positron with a neutrino in so-called ''positron emission''. Neither the beta particle nor its associated (anti-)neutrino exist within the nucleus prior to beta decay, but are created in the decay process. By this process, unstable atoms obtain a more stable ratio of protons to neutrons. The probability of a nuclide decaying due to beta and other forms of decay is determined by its nuclear binding energy. The binding energies of all existing nuclides form what is called the nuclear band or valley of stability. For either electron or positron em ... [...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] |
Ioffe Institute
The Ioffe Physical-Technical Institute of the Russian Academy of Sciences (for short, Ioffe Institute, russian: Физико-технический институт им. А. Ф. Иоффе) 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. 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 in May 2018 Ministry of Sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint Petersburg State University
Saint Petersburg State University (SPBU; russian: Санкт-Петербургский государственный университет) is a public research university in Saint Petersburg, Russia. Founded in 1724 by a decree of Peter the Great, the university from the beginning has had a focus on fundamental research in science, engineering and humanities. During the Soviet period, it was known as Leningrad State University (russian: Ленинградский государственный университет). It was renamed after Andrei Zhdanov in 1948 and was officially called "Leningrad State University, named after A. A. Zhdanov and decorated with the Order of Lenin and the Order of the Red Banner of Labour." Zhdanov's was removed in 1989 and Leningrad in the name was officially replaced with Saint Petersburg in 1992. It is made up of 24 specialized faculties (departments) and institutes, the Academic Gymnasium, the Medical College, the College of Physical Culture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tbilisi
Tbilisi ( ; ka, თბილისი ), in some languages still known by its pre-1936 name Tiflis ( ), is the Capital city, capital and the List of cities and towns in Georgia (country), largest city of Georgia (country), Georgia, lying on the banks of the Kura (Caspian Sea), Kura River with a population of approximately 1.5 million people. Tbilisi was founded in the 5th century Anno Domini, AD by Vakhtang I of Iberia, and since then has served as the capital of various Georgian kingdoms and republics. Between 1801 and 1917, then part of the Russian Empire, Tiflis was the seat of the Caucasus Viceroyalty (1801–1917), Caucasus Viceroyalty, governing both the North Caucasus, northern and the Transcaucasia, southern parts of the Caucasus. Because of its location on the crossroads between Europe and Asia, and its proximity to the lucrative Silk Road, throughout history Tbilisi was a point of contention among various global powers. The city's location to this day ensures its p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
