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Radiation (other)
Radiation is a process in which a body emits energy that propagates through a medium or through empty space, but is absorbed by other bodies. Radiation may also refer to: Physics * Electromagnetic radiation, radiation that takes the form of a self-propagating wave of electric and magnetic fields, **Particular wavelength bands of full electromagnetic spectrum, such as gamma rays, radio waves, visible light **Thermal radiation, electromagnetic radiation that emanates from every object above absolute zero in proportion to the fourth power of its temperature **Synchrotron radiation (also called a synchrotron light source), electromagnetic radiation generated by the acceleration of fast moving charged particles through magnetic fields * Gravitational radiation, radiation that takes the form of gravitational waves, or ripples in the curvature of spacetime. * Ionizing radiation, radiation that is of high enough energy to cause atoms to lose or gain electrons, rendering molecules, such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiation
In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium. This includes: * ''electromagnetic radiation'', such as radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma radiation (γ) * ''particle radiation'', such as alpha radiation (α), beta radiation (β), proton radiation and neutron radiation (particles of non-zero rest energy) * '' acoustic radiation'', such as ultrasound, sound, and seismic waves (dependent on a physical transmission medium) * ''gravitational wave, gravitational radiation'', that takes the form of gravitational waves, or ripples in the curvature of spacetime Radiation is often categorized as either ''ionizing radiation, ionizing'' or ''non-ionizing radiation, non-ionizing'' depending on the energy of the radiated particles. Ionizing radiation carries more than 10 electron volt, eV, which is enough to ionize atoms and molecules and break ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seismic Wave
A seismic wave is a wave of acoustic energy that travels through the Earth. It can result from an earthquake, volcanic eruption, magma movement, a large landslide, and a large man-made explosion that produces low-frequency acoustic energy. Seismic waves are studied by seismologists, who record the waves using seismometers, hydrophones (in water), or accelerometers. Seismic waves are distinguished from seismic noise (ambient vibration), which is persistent low-amplitude vibration arising from a variety of natural and anthropogenic sources. The propagation velocity of a seismic wave depends on density and elasticity of the medium as well as the type of wave. Velocity tends to increase with depth through Earth's crust and mantle, but drops sharply going from the mantle to Earth's outer core. Earthquakes create distinct types of waves with different velocities. When recorded by a seismic observatory, their different travel times help scientists locate the quake's hypocen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toby Fox
Robert F. Fox (born October 11, 1991), known professionally as Toby Fox (previously Toby "Radiation" Fox), is an American video game developer and video game composer. He is known for developing the role-playing video games ''Undertale'' and ''Deltarune'' for which the former garnered acclaim and he received nominations for a British Academy Game Award and three Game Awards. Fox's early work consisted primarily of composing music, notably doing so for the webcomic ''Homestuck'', and, following the success of ''Undertale'', he went on to compose music for a number of other independent video games. Other notable works include contributing to the soundtracks of ''Super Smash Bros. Ultimate'' and multiple ''Pokémon'' video games. Career Early work and composing Toby Fox's earliest well-known work is his "EarthBound Halloween Hack", a Halloween-themed ROM hack of the 1994 Super NES game ''EarthBound'' released in 2008. He then moved onto composing a variety of music for Andr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roddy Radiation
Roddy Radiation (born Roderick James Byers, 5 May 1955 in Keresley, Coventry, England) is an English musician who played lead guitar for The Specials, as well as many rockabilly bands such as the Bonediggers and the Tearjerkers. He wrote the Specials favourites "Concrete Jungle", "Rat Race" and " Hey, Little Rich Girl", later covered by Amy Winehouse. Currently, Byers leads The Skabilly Rebels, a band that mixes ska rhythms with rockabilly. Biography Byers' first real band was formed in Coventry in 1975 and were called The Wild Boys. It was in The Wild Boys that he started songwriting. His first was "1980's Teddy Boy", and later came "Concrete Jungle" which was recorded by The Specials for their debut album, '' Specials'' (1979). Byers joined The Specials when the band was called The Coventry Automatics and wrote several songs for the band. The most successful was "Rat Race", which peaked at number five in the UK Singles Chart in May 1980. Byers also wrote "Hey Little Rich ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiation (album)
''Radiation'' is the tenth studio album by the British neo-progressive rock band Marillion, released in 1998. Recorded at The Racket Club between November 1997 and June 1998, it was co-produced and mixed by Stewart Every. The album was remixed by Michael Hunter in September to November 2012 and a reissued remastered version was released in 2013. Background For this album the band decided to experiment with different instrument tones, vocal effects, samples (making transitions between songs by cutting and pasting pieces from elsewhere in the album), and the like. As the album recording progressed, there was "a desire for new sounds and a desire not to repeat ourselves and to fall into familiar patterns", according to guitarist Steve Rothery. The first element was that Rothery decided he wanted a different guitar sound. They placed a ban on digital delay and chorus which had been Rothery's sound for years. He borrowed a Gretsch from Dave Gregory, and played on a Harmony guit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adaptive Radiation
In evolutionary biology, adaptive radiation is a process in which organisms diversify rapidly from an ancestral species into a multitude of new forms, particularly when a change in the environment makes new resources available, alters biotic interactions or opens new environmental niches. Starting with a single ancestor, this process results in the speciation and phenotypic adaptation of an array of species exhibiting different morphological and physiological traits. The prototypical example of adaptive radiation is finch speciation on the Galapagos ("Darwin's finches"), but examples are known from around the world. Characteristics Four features can be used to identify an adaptive radiation: #A common ancestry of component species: specifically a ''recent'' ancestry. Note that this is not the same as a monophyly in which ''all'' descendants of a common ancestor are included. #A phenotype-environment correlation: a ''significant'' association between environments and the morp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evolutionary Radiation
An evolutionary radiation is an increase in taxonomic diversity that is caused by elevated rates of speciation, that may or may not be associated with an increase in morphological disparity. Radiations may affect one clade or many, and be rapid or gradual; where they are rapid, and driven by a single lineage's adaptation to their environment, they are termed adaptive radiations. Examples Perhaps the most familiar example of an evolutionary radiation is that of placental mammals immediately after the extinction of the non-avian dinosaurs at the end of the Cretaceous, about 66 million years ago. At that time, the placental mammals were mostly small, insect-eating animals similar in size and shape to modern shrews. By the Eocene (58–37 million years ago), they had evolved into such diverse forms as bats, whales, and horses. Other familiar radiations include the Avalon Explosion, the Cambrian Explosion, the Great Ordovician Biodiversification Event, the Carboniferous-Earliest Perm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auditory System
The auditory system is the sensory system for the sense of hearing. It includes both the sensory organs (the ears) and the auditory parts of the sensory system. System overview The outer ear funnels sound vibrations to the eardrum, increasing the sound pressure in the middle frequency range. The middle-ear ossicles further amplify the vibration pressure roughly 20 times. The base of the stapes couples vibrations into the cochlea via the oval window, which vibrates the perilymph liquid (present throughout the inner ear) and causes the round window to bulb out as the oval window bulges in. Vestibular and tympanic ducts are filled with perilymph, and the smaller cochlear duct between them is filled with endolymph, a fluid with a very different ion concentration and voltage. Vestibular duct perilymph vibrations bend organ of Corti outer cells (4 lines) causing prestin to be released in cell tips. This causes the cells to be chemically elongated and shrunk ( somatic motor), and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Visual System
The visual system comprises the sensory organ (the eye) and parts of the central nervous system (the retina containing photoreceptor cells, the optic nerve, the optic tract and the visual cortex) which gives organisms the sense of sight (the ability to perception, detect and process visible light) as well as enabling the formation of several non-image photo response functions. It detects and interprets information from the optical spectrum perceptible to that species to "build a representation" of the surrounding environment. The visual system carries out a number of complex tasks, including the reception of light and the formation of monocular neural representations, colour vision, the neural mechanisms underlying stereopsis and assessment of distances to and between objects, the identification of a particular object of interest, motion perception, the analysis and integration of visual information, pattern recognition, accurate motor coordination under visual guidance, and mor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Matter
White matter refers to areas of the central nervous system (CNS) that are mainly made up of myelinated axons, also called tracts. Long thought to be passive tissue, white matter affects learning and brain functions, modulating the distribution of action potentials, acting as a relay and coordinating communication between different brain regions. White matter is named for its relatively light appearance resulting from the lipid content of myelin. However, the tissue of the freshly cut brain appears pinkish-white to the naked eye because myelin is composed largely of lipid tissue veined with capillaries. Its white color in prepared specimens is due to its usual preservation in formaldehyde. Structure White matter White matter is composed of bundles, which connect various grey matter areas (the locations of nerve cell bodies) of the brain to each other, and carry nerve impulses between neurons. Myelin acts as an insulator, which allows electrical signals to jump, rather than c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acoustic Radiation
The acoustic radiations or auditory radiations are structures found in the brain, in the ventral cochlear pathway, a part of the auditory system. Acoustic radiation arising in the medial geniculate nucleus and end in primary auditory cortex (transverse temporal gyri). Lesions to the auditory radiations could be a cause of cortical deafness Cortical deafness is a rare form of sensorineural hearing loss caused by damage to the primary auditory cortex. Cortical deafness is an auditory disorder where the patient is unable to hear sounds but has no apparent damage to the anatomy of the ea .... References Auditory system Thalamic connections Cerebral white matter {{neuroanatomy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optic Radiation
In neuroanatomy, the optic radiation (also known as the geniculocalcarine tract, the geniculostriate pathway, and posterior thalamic radiation) are axons from the neurons in the lateral geniculate nucleus to the primary visual cortex. The optic radiation receives blood through deep branches of the middle cerebral artery and posterior cerebral artery. They carry visual information through two divisions (called upper and lower division) to the visual cortex (also called ''striate cortex'') along the calcarine fissure. There is one set of upper and lower divisions on each side of the brain. If a lesion only exists in one unilateral division of the optic radiation, the consequence is called quadrantanopia, which implies that only the respective superior or inferior quadrant of the visual field is affected. If both divisions on one side of the brain are affected, the result is a contralateral homonymous hemianopsia. Structure The upper division: :* Projects to the upper bank of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
