Color or Colour is the visual perception based on the electromagnetic spectrum. Though color is not an inherent property of matter, color perception is related to an object's light absorption, reflection, emission spectra, and interference. For most humans, colors are perceived in the visible light spectrum with three types of cone cells (trichromacy). Other animals may have a different number of cone cell types or have eyes sensitive to different wavelength, such as bees that can distinguish ultraviolet, and thus have a different color sensitivity range. Animal perception of color originates from different light wavelength or spectral sensitivity in cone cell types, which is then processed by the brain.
Eric Arthur Blair was an English novelist, poet, essayist, journalist, and critic who wrote under the pen name of George Orwell. His work is characterised by lucid prose, social criticism, opposition to totalitarianism, and support of democratic socialism.
The visible spectrum is the band of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light. The optical spectrum is sometimes considered to be the same as the visible spectrum, but some authors define the term more broadly, to include the ultraviolet and infrared parts of the electromagnetic spectrum as well, known collectively as optical radiation.
A holon is something that is simultaneously a whole in and of itself, as well as a part of a larger whole. In this way, a holon can be considered a subsystem within a larger hierarchical system.
Darkness at Noon is a novel by Hungarian-born novelist Arthur Koestler, first published in 1940. His best known work, it is the tale of Rubashov, an Old Bolshevik who is arrested, imprisoned, and tried for treason against the government that he helped to create.
The Sleepwalkers: A History of Man's Changing Vision of the Universe is a 1959 book by Arthur Koestler. It traces the history of Western cosmology from ancient Mesopotamia to Isaac Newton. He suggests that discoveries in science arise through a process akin to sleepwalking. Not that they arise by chance, but rather that scientists are neither fully aware of what guides their research, nor are they fully aware of the implications of what they discover.
Paul Kammerer was an Austrian biologist who studied and advocated Lamarckism, the theory that organisms may pass to their offspring characteristics acquired in their lifetime, meaning variation would be directed towards creating adaptations.
The Thirteenth Tribe is a 1976 book by Arthur Koestler advocating the Khazar hypothesis of Ashkenazi ancestry, the thesis that Ashkenazi Jews are not descended from the historical Israelites of antiquity, but from Khazars, a Turkic people. Koestler hypothesized that the Khazars migrated westwards into Eastern Europe in the 12th and 13th centuries when the Khazar Empire was collapsing.
The emission spectrum of atomic hydrogen has been divided into a number of spectral series, with wavelengths given by the Rydberg formula. These observed spectral lines are due to the electron making transitions between two energy levels in an atom. The classification of the series by the Rydberg formula was important in the development of quantum mechanics. The spectral series are important in astronomical spectroscopy for detecting the presence of hydrogen and calculating red shifts.
Flight Lieutenant Richard Hope Hillary was an Anglo-Australian Royal Air Force fighter pilot during the Second World War. He wrote the book The Last Enemy about his experiences during the Battle of Britain.
Hyperspectral imaging collects and processes information from across the electromagnetic spectrum. The goal of hyperspectral imaging is to obtain the spectrum for each pixel in the image of a scene, with the purpose of finding objects, identifying materials, or detecting processes. There are three general types of spectral imagers. There are push broom scanners and the related whisk broom scanners, which read images over time, band sequential scanners, which acquire images of an area at different wavelengths, and snapshot hyperspectral imagers, which uses a staring array to generate an image in an instant.
Spanish Testament is a 1937 book by Arthur Koestler, describing his experiences during the Spanish Civil War. Part II of the book was subsequently published on its own, with minor modifications, under the title Dialogue with Death. Koestler made three trips to Spain during the civil war; the third time he was captured, sentenced to death and imprisoned by the Nationalist forces of General Franco. Koestler was working as an espionage agent on behalf of the Comintern and as an agent of the Second Spanish Republic's official news agency, using for cover accreditation to the British daily News Chronicle.
Dialogue with Death, a book by Arthur Koestler, was originally published in 1937 as a section of his book Spanish Testament, in which he describes his experiences during the Spanish Civil War. Part II of the book was subsequently decoupled from Spanish Testament and, with minor modifications, published on its own under the title Dialogue with Death. The book describes Koestler’s prison experiences under sentence of death. The book was written in the late autumn of 1937 immediately after his release from prison, when the events were still vivid in his memory.
In statistical signal processing, the goal of spectral density estimation (SDE) or simply spectral estimation is to estimate the spectral density of a signal from a sequence of time samples of the signal. Intuitively speaking, the spectral density characterizes the frequency content of the signal. One purpose of estimating the spectral density is to detect any periodicities in the data, by observing peaks at the frequencies corresponding to these periodicities.
Lumpenbourgeoisie is a term used in colonial sociology to describe members of the middle class and upper class who have little collective self-awareness or economic base and who support the colonial masters. It is often attributed to Andre Gunder Frank in 1972, although the term is already present in several texts by Lukács (1943), Koestler (1945), C. Wright Mills (1951) and also in Paul Baran's The Political Economy of Growth (1957). Nonetheless, the term was popularized by Frank's book Lumpenbourgeoisie and Lumpendevelopment: Dependency, Class and Politics in Latin America (1972) which used it in its title.
Arthur Koestler was a Hungarian-born author and journalist. Koestler was born in Budapest and, apart from his early school years, was educated in Austria. In 1931, Koestler joined the Communist Party of Germany, but he resigned in 1938 after becoming disillusioned with Stalinism.
In 1949, shortly before he died, the English author George Orwell prepared a list of notable writers and other people he considered to be unsuitable as possible writers for the anti-communist propaganda activities of the Information Research Department, a secret propaganda organisation of the British state under the Foreign Office. A copy of the list was published in The Guardian in 2003 and the original was released by the Foreign Office soon after.
Living with Koestler: Mamaine Koestler's Letters 1945–51 is a book about the author Arthur Koestler and Mamaine Paget, Koestler's second wife. More specifically, it is a selected compilation of Mamaine's letters to her twin sister Celia about her life with Koestler. The spontaneous and engaging letters reflect the intensity of her life with Koestler between 1945 and 1951.
The Case of the Anti-Soviet "Bloc of Rightists and Trotskyites", also known as the Trial of the Twenty-One, was the last of the three public Moscow trials charging prominent Bolsheviks with espionage and treason. The Trial of the Twenty-One took place in Moscow in March 1938, towards the end of the Soviet Great Purge. The accused were tortured to extract confessions and publicly admitted their guilt during the show trial. Most of the accused, including Nikolai Bukharin, Alexei Rykov and Genrikh Yagoda, were convicted to death. All charges are considered fabricated except that Valerian Kuybyshev, Vyacheslav Menzhinsky, and Maxim Gorky might indeed be poisoned by NKVD chief Genrikh Yagoda with the assistance of "Kremlin's doctors" Pletnyov and Lev Levin, but they did it on the orders from Stalin himself.
Critical Essays (1946) is a collection of wartime pieces by George Orwell. It covers a variety of topics in English literature, and also includes some pioneering studies of popular culture. It was acclaimed by critics, and Orwell himself thought it one of his most important books.
