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| | radiation on Encyclopedia.com |
 | | A father is overcome with sadness as he sits with his daughter who is suffering from the effects of radiation. | | | Examples of particle radiation are alpha and beta rays in radioactivity, and many kinds of atomic and subatomic particles such as electrons, mesons, neutrons, protons, and heavier nuclei (see cosmic rays). | | | Acoustic radiation, propagated as sound waves, may be sonic (in the frequency range from 16 to 20,000 cycles per sec), infrasonic, or subsonic (frequency less than 16 cycles per sec), and ultrasonic (frequency greater than 20,000 cycles per sec). |
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http://www.encyclopedia.com/html/r1/radiatn.asp
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| | Glutathione and Radiation Hormesis |
| | We are investigating "hormesis", a beneficial effect of radiation observed in both animal experiments and human epidemiological data as an extended life span in subjects exposed to low radiation doses compared to matched unirradiated controls. | | | Experiments were designed to test the hypotheses that low doses of radiation trigger an antioxidant defense mechanism, and this antioxidant defense is capable of protecting DNA against highly reactive free radicals of the kind produced during normal metabolism. | | | This impedes incorporating hormesis into risk analysis, because risks must be assessed on the basis sound scientific principles in order to be defensible. |
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http://lowdose.tricity.wsu.edu/2001mtg/abstracts/bailey.htm
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| | APPARATUS FOR THE TREATMENT OF NEUROPSYCHIC AND SOMATIC DISEASES WITH HEAT, LIGHT, SOUND AND VHF ELECTROMAGNETIC RADIATION (US3773049) |
| | The light radiation and sound radiation sources are made so as to exert an adequate and monotonous influence of the light-and sound-radiation on the patient's visual analyzers and auditory analyzers, respectively. | | | Sound radiation source 2 is a small-size loudspeaker I6 which is electrically connected with another secondary winding 21 of the transformer I5 through a diode I7, variable resistor I8, constant resistor I9, contacts 8 of the vibrator and switch 20. | | | The sources I, 2 and 4 of light radiation, sound radiation and heat radiation, respectively, are mounted in the same casing (not shown in the drawing). |
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http://www.raven1.net/3773049.htm
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| | Radiation |
| | Radiation of sound Radiation of sound should not be confused with propagation of momentum into the fluid medium. | | | Radiation Radiation generally means the transmission of objects or information from a source into a surrounding medium o... | | | Radiation protection Radiation protection, sometimes known as radiological protection, is the science of protecting pe... |
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http://www.brainyencyclopedia.com/topics/radiation.html
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| | Sound wave operated energy corverter for producing different forms of movement - Patent 5317876 |
| | An energy converter as recited in claim 1, wherein said source means comprises two spaced apart resonators, one of said resonators radiating an acoustic radiation pressure to cause the body to move in one direction and the other resonator radiating an acoustic radiation pressure to cause the body to move in an opposite direction. | | | Though the actual acoustic radiation pressure is as complicated as the sound wave distribution, in the case of the disk-shaped resonator having a diameter of 20 mm within the liquid medium, the sound wave caused by the vibrations of the disk-shaped resonator generates the sound field as illustrated in FIG. | | | The force F, which a substance receives from a radiation pressure when the substance is in limitless plane progressive sound field whose sound energy density is E, depends on the characteristics of the substance as shown in FIG. |
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http://www.freepatentsonline.com/5317876.html
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| | Radiation of sound - Wikipedia, the free encyclopedia |
| | Radiation of sound should not be confused with propagation of sound. | | | Radiation of sound from structures occurs most efficiently when there is a net volume velocity of the structure surface into the fluid. | | | Succinctly, radiation of sound is caused by the transfer of momentum into the fluid medium. |
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http://en.wikipedia.org/wiki/Radiation_of_sound
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| | Moshe Fuchs' Homepage |
| | Krylov "Radiation of Sound by a Membrane Undergoing Impact Loading", All-Union Seminar of Academy of Sci. | | | Krylov "Analysis of Radiation of Sound for some Transient Problems of Hydroelasticity", In Abstracts of International Conference "NOISE-93", St. Petersburg, Russia, June 1-3, 1993. | | | of USSR on Vibrations and Sound Radiation in Mechanical Structures", Repino, Russia,1991. |
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http://www.eng.tau.ac.il/~vadis/publications.html
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| | Klaus Wogram: The strings and the soundboard |
| | For this reason, experiments were made to determine the general influence of ribs on input impedance and sound radiation. | | | Every second rib was removed by routing it down to the level of the soundboard, and input impedance and sound radiation were measured. | | | Turning to the sound radiation, the same effects were observed as for the impedance; the lower resonant frequencies are shifted downwards and sound radiation is reduced. |
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http://www.speech.kth.se/music/5_lectures/wogram/ribbing.html
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| | No sub category |
| | Monitoring Technologies Corporation is a manufacturers representative and distributor of environmental and industrial hygiene instrumentation, soil and water sampling equipment, noise and sound monitors, gas and radiation detectors, and air quality analyzers. | | | DRGB Ltd, Dosimeters Engineering, Professional tools for personal radiation safety providing personal dosimeters for protection against radiation, protect yourself from danger and the threat of radiation for your safety and health. | | | Larson-Davis Laboratories is a major supplier of integrated systems used for perimeter sound monitoring. |
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http://www.radiationdetox.com/links/geiger-counter-no-sub-category.htm
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| | Patent 4322578: Method and devices for the omnidirectional radiation of sound waves |
| | The present invention pertains to a method and apparatus for achieving a uniform omnidirectional radiation of sound waves, particularly at high frequencies, and for increasing selectivity and separation at frequencies in the medium to high frequency wave band The apparatus consists of a series of reflector-diffractor barriers which are frequency selective. | | | This is because sound radiation remains spherical, and therefore omnidirectional, only as long as the radiated wave-length is much greater than the diameter of the sound source, which is generally only true for low frequencies. | | | In these embodiments, by virtue of the opposition of the two loudspeakers, the sound waves radiated in phase are compressed among themselves and, owing to this reciprocal compression, gain a higher efficiency in db (sound pressure level), a stronger presence, and clearer audibility both for singing and speaking pieces. |
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http://www.freepatentsonline.com/4322578.html
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| | Noise and Hearing Conservation Technical Manual Chapter: Noise and Health Effects (App I:A-3) |
| | The sound pressure level at a distance of 20 feet from the source would be calculated as follows (since the source is located on the ground, the equation for hemispherical radiation from a point source is used): | | | However, the sound pressure level at some distance (r) from the source is dependant on that distance and the sound-absorbing characteristics of the environment. | | | The magnitude of the sound pressure from a given sound source, however, depends on the distance from the source and the characteristics of the environmental surroundings. |
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http://www.osha.gov/dts/osta/otm/noise/health_effects/soundpropagation.html
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| | EPA - Ionizing & Non-Ionizing Radiation (EPA's Radiation Protection Program: Understanding Radiation) |
| | Radiation that has enough energy to move atoms in a molecule around or cause them to vibrate, but not enough to remove electrons, is referred to as "non-ionizing radiation." Examples of this kind of radiation are sound waves, visible light, and microwaves. | | | X-ray and gamma ray radiation, which are at the upper end of magnetic radiation have very high frequency --in the range of 100 billion billion Hertz--and very short wavelengths--1 million millionth of a meter. | | | Compared to other types of radiation that may be absorbed, ionizing radiation deposits a large amount of energy into a small area. |
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http://www.epa.gov/radiation/understand/ionize_nonionize.htm
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| | EPA - Ionizing & Non-Ionizing Radiation (EPA's Radiation Protection Program: Understanding Radiation) |
| | Radiation that has enough energy to move atoms in a molecule around or cause them to vibrate, but not enough to remove electrons, is referred to as "non-ionizing radiation." Examples of this kind of radiation are sound waves, visible light, and microwaves. | | | X-ray and gamma ray radiation, which are at the upper end of magnetic radiation have very high frequency --in the range of 100 billion billion Hertz--and very short wavelengths--1 million millionth of a meter. | | | This is the type of radiation that people usually think of as 'radiation.' We take advantage of its properties to generate electric power, to kill cancer cells, and in many manufacturing processes. |
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http://www.epa.gov/radiation/understand/ionize_nonionize.htm
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| | Matter, Energy, and Radiation Hydrodynamics |
| | On the other hand, since radiation conduction is mediated by photons which travel at the speed of light, the actual bounding velocity of thermal waves is much higher than classical kinetic heat conduction which is limited by the speed of sound. | | | For example in hydrogen at its normal liquid density, radiation energy density is equal to the kinetic energy of the ionized gas at 1.3 x 10^7 degrees K. The energy distribution of the radiation field with photon energy is given by Planck's Law, which is usually stated in terms of photon frequency instead of energy. | | | Radiation diffusion (based on the application of diffusion theory) describes photon transport where the energy density gradient is small, i.e. |
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http://nuclearweaponarchive.org/Nwfaq/Nfaq3.html
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| | IHS ESDU: Data Item 00002 |
| | The ability of the single plate to radiate sound power is described by its radiation efficiency which depends on the properties of the plate and of the fluid, the boundary conditions of the plate and the nearby surrounding structure referred to as a baffle. | | | ESDU 00002 describes how vibrating plates radiate sound power by setting the surrounding fluid in motion, and it allows the estimation of the sound power radiated from an isotropic plate to a fluid with properties similar to those of air (low fluid loading). | | | For a double plate, the fluid in the gap between the plates will influence the sound power radiation and a theory different from that used for the single plate must therefore be employed. |
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http://www.esdu.com/graphics/dataitem/00002.htm
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| | MO'C Physics Applied-- Thermal Inversions |
| | That means that within inversion layers the speed of sound is highest at the top of the layer and lowest at the bottom of the layer. | | | However, due to the fact that the speed of sound in an inversion layer is higher at higher altitudes above the ground, we expect the upper path A-B to be longer than the path C-D, because of the relative differences in the speed of sound at the two altitudes. | | | This conceptual diagram shows how the influence of a temperature inversion can sometimes cause distant sources of noise to sound much closer than they really are. |
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http://users.lmi.net/moc/inversion.html
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| | heat.txt |
| | Also, the wavelength of the sound is similar to the wavelength of longwave IR radiation. | | | The upshot: "heat energy" is the regime where sound has become so high in frequency that it moves slowly and is renamed as "thermal vibrations." And the wavelength of the sound is so short that it can interact with individual atoms and be converted to IR light. | | | In this range of frequencies the speed of sound drops radically, until the sound "oozes" rather than propagating as a wave, and moves as incoherent, interacting vibrations. |
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http://www.eskimo.com/~billb/heat.txt
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| | Interaction Metrics For Feedback Control Of (ResearchIndex) |
| | This problem is typically treated as one of minimizing sound radiation from individual bays of the aircraft fuselage, where a bay is a rectangular portion of the fuselage skin bounded by ring frames and stringers. | | | Abstract: Introduction A CTIVE control of sound radiation due to turbulent boundary layer excitation of an aircraft fuselage has been the subject of much recent research. | | | Sound Radiation From Stiffened Panels Randolph H. Cabell, David E. Cox +,... |
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http://citeseer.ist.psu.edu/627071.html
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| | radiation -- Encyclopædia Britannica |
| | Familiar examples of radiant energy include light (a form of electromagnetic radiation) and sound (a form of acoustic radiation). | | | Radiation may be applied to the body by implanting radioactive substances into the tumors or by exposing the body to external sources of ionizing radiation. | | | Radiation is the movement, or propagation, of energy from one place to another. |
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http://www.britannica.com/eb/article?tocId=9062397
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| | NSDL Metadata Record -- "Cherenkov radiation" of a sound in a Bose-condensed gas |
| | NSDL Metadata Record -- "Cherenkov radiation" of a sound in a Bose-condensed gas | | | "Cherenkov radiation" of a sound in a Bose-condensed gas | | | In terms of linearized Gross-Pitaevskii equation we have studied the process of sound emission arises from a supersonic particle motion in a Bose-condensed gas. |
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http://nsdl.org/mr/163503
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| | CARA - Loudspeaker - 3D Radiation of Sound Pressure;; Directivity Patterns of Loudspeakers |
| | Due to this very detailed set of sound radiation data specified for each CARA loudspeaker model the results of the room acoustic calculations may well be compared with acoustic measurements (see also chapter 'Comparison: CARA and Measurements'). | | | At the selected frequency (about 6 kHz) you may easily identify the radiation patterns of each single driver due to their relatively narrow radiation aperture. | | | The complete set of CARA directivity data contains about 4,000 Sound Pressure Frequency Responses (118 frequencies from 5 to 40,960 Hz, frequency step = 1/9 octave) which are calculated by the 'Loudspeaker Editor' at about 1,000 angles around the speaker and at four different distances (1, 3, 5, and 10 m). |
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http://www.cara.de/ENU/CARA/box3.html
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| | AudioVideo101.com - Learn About Audio/Video - Articles |
| | As a sound wave is produced at the front of the speaker, its exact opposite is produced from the rear of the speaker and vice versa. | | | Sound may be produced in a single direction aimed at a particular area of space known as direct radiating. | | | Since direct radiators generate sound waves in a particular direction without the effect of reflected sound (or at least without the intentional use of reflected sound), they are able to recreate the sonic event with greater accuracy than other speaker formats. |
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http://www.audiovideo101.com/learn/articles/speakers/speakers10.asp
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| | Electromagnetism |
| | Electromagnetic radiation spans an enormous range of frequencies or wavelengths, as is shown by the electromagnetic spectrum. | | | Electromagnetic radiation is energy that is propagated through free space or through a material medium in the form of electromagnetic waves, such as radio waves, visible light, and gamma rays. | | | Electromagnetic radiation has properties in common with other forms of waves such as reflection, refraction, diffraction, and interference. |
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http://zebu.uoregon.edu/~js/21st_century_science/lectures/lec04.html
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| | Home 2 |
| | This powerful perspective of sound radiation provides the reader with a comprehensive and practical understanding that will enable him or her to diagnose and solve the sound and vibration problems of the 21st century. | | | As a result of this perspective, Fourier Acoustics is able to present thoroughly and simply, for the first time in book form, the theory of nearfield acoustical holography, an important technique which has revolutionised the measurement of sound. | | | The second part of the book is devoted to a more rigorous development of the wave equation, spherical and cylindrical waves (including the more advanced mathematics required), advanced waveguides, baffled piston radiation, diffraction (treated in the time domain), and arrays. |
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http://www.iiav.org/books1.htm
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| | MO'C Physics Applied-- Thermal Inversions |
| | However, due to the fact that the speed of sound in an inversion layer is higher at higher altitudes above the ground, we expect the upper path A-B to be longer than the path C-D, because of the relative differences in the speed of sound at the two altitudes. | | | That means that within inversion layers the speed of sound is highest at the top of the layer and lowest at the bottom of the layer. | | | All of the curved lines on the diagram, those drawn in green, pertain to atmospheric conditions when an inversion is present; the straight, gray dotted lines depict sound propagation during 'neutral' atmospheric conditions when there is no inversion. |
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http://users.lmi.net/moc/inversion.html
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| | TNO TPD - Prediction of underwater sound radiation |
| | Describing and quantifying this structure-borne sound source in terms of input power is the first step required for the prediction of the under water sound radiation. | | | Radiation: Eventually, the part of the ship hull that is in contact with water will radiate sound into the water. | | | Because of the high demands on the under water sound signature of naval ships, the low noise philosophy is present early in the design stage of these vessels, as well as the search for cost-effective solutions. |
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http://www.tpd.tno.nl/smartsite385.html
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| | Y.H.Kim's Lab./master_thesis |
| | Then the estimated radiation sound pressure can be computed using the coefficients of spherical Hankel function which is obtained from the measurement of sound pressure by line array microphone. | | | In case of the first possible physical situation, it is known that Kirchhoff-Helmholtz integral equation cannot be applied to the prediction of radiation sound pressure using measured pressure or velocity information by line array microphone. | | | To use the near field acoustic holograpy as a radation sound pressure estimation method the restoration method of hologram from the measured pressure by line array microphone is also investigated because they can be regarded as a sort of plane measurement. |
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http://soundmasters.kaist.ac.kr/thesis/master15.html
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| | FM 8-9 Part I/Chptr 3 Effects of Nuclear Explosions |
| | Initially, the speed of the shock front is many times the speed of sound because it is traveling through superheated air, but as it travels away from the fireball it slows down to the speed of sound, 330 m/sec, in normal atmospheres. | | | In an atmospheric detonation, this electromagnetic radiation, consisting chiefly of soft x-ray, is absorbed within a few meters of the point of detonation by the surrounding atmosphere, heating it to extremely high temperatures and forming a brilliantly hot sphere of air and gaseous weapon residues, the so-called fireball. | | | The atoms do not release the energy as kinetic energy but release it in the form of large amounts of electromagnetic radiation. |
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http://www.fas.org/nuke/guide/usa/doctrine/dod/fm8-9/1ch3.htm
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| | 12 |
| | Infra red radiation is used in grills, toasters and radiant heaters, in optical fibre communication and for the remote control of TV sets and VCRs. | | | Electromagnetic radiation and sound are also diffracted which supports the idea that they travel as waves. | | | The larger the dose of radiation the greater the risk of cancer. |
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http://learningat.ke7.org.uk/scienceweb/GCSE/Waves/waves.htm
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