Electromagnetism cTopic Classical electromagnetism Electrodynamics Electromagneticradiation often abbreviated ... . Electromagneticradiation is classified according to the frequency of its wave. In order of increasing ... interaction and the basic unit of light and all other forms of electromagneticradiation and is also the force carrier for the electromagnetic force. Electromagneticradiation carries energy and momentum ... between electromagneticradiation and matter such as electrons is described by the theory .... For example, when electromagneticradiation is absorbed by matter, particle like properties will be more ... by a photomultiplier or other sensitive detector only once. Wave model Electromagneticradiation ... phenomenon occurs for Emission electromagneticradiation emission . As the electrons descend ... of the electrons. This is manifested in the Emission electromagneticradiation emission spectrum of nebula ..., produces electromagneticradiation. Electromagnetic information about the charge travels at the speed ... conducts alternating current , electromagneticradiation is propagated at the same frequency as the electric current. At the quantum level, electromagneticradiation is produced when the wavepacket ..., electromagneticradiation may behave as a wave or as photon particle s. As a wave ... of these are ratios of the speed in a medium to speed in a vacuum. Thermal radiation and electromagnetic ... particles bound together in many different ways. When electromagneticradiation is incident on matter ... effect , absorbed electromagneticradiation simply deposits its energy by heating the material ... lasers can also easily set paper afire. Ionizing electromagneticradiation can create high ... and other electromagneticradiation is not, is a widespread misconception in physics. Any electromagnetic ... the material. Radiation is an important mechanism of heat transfer . The electromagneticradiation ... entropy radiation entropy . The thermodynamic potentials of electromagneticradiation can be well ... more details
electromagneticradiation attenuation . Usually, the absorption of waves does not depend on their intensity ... File Atmospheric electromagnetic opacity.svg thumb right Rough plot of Earth s atmospheric transmittance or opacity to various wavelengths of electromagneticradiation, including visible light . Understanding and measuring the absorption of electromagneticradiation has an enormous variety ..., an Absorption spectroscopy absorption spectra can be obtained. In physics , absorption of electromagneticradiation is the way by which the energy of a photon is taken up by matter, typically the electrons of an atom. Thus, the electromagnetic energy is transformed to other forms of energy ... of ways to quantify how quickly and effectively radiation is absorbed in a certain medium ... absorbs radiation. However, practitioners of different fields and techniques tend to conventionally ... temperatures depend in large part on the absorption of radiation by atmospheric gases such as in the greenhouse ... radiation to different extents at different frequencies, which allows for material identification ... External links Category Scattering, absorption and radiative transfer optics Category Electromagneticradiation Category Glass physics ar cs Absorpce sv tla da Absorption de Absorption ... more details
Electromagneticradiation can be classified into ionization ionizing radiation and non ionizing radiation ... electromagneticradiation can cause electric currents strong enough to create sparks electrical ... States government adopts the following definition Electromagneticradiation hazards RADHAZ ... installation located in an area that is illuminated by electromagneticradiation at a level that is hazardous ... suggests that the low power, low frequency, electromagneticradiation associated with electric ... more than 2 billion users worldwide . Mobile phone s use electromagneticradiation in the microwave ... DEFAULTSORT ElectromagneticRadiation And Health Category Public health Category Radiobiology ... see radiation and radiation poisoning . Non ionizing radiation, discussed here, is associated with two major potential hazards electrical and biological. Additionally, Electromagnetic induction induced electric current caused by radiation can generate sparks and create a fire or explosive hazard. Types of hazards Electrical hazards The oscillating electromagnetic field electric and magnetic fields in electromagneticradiation will induce an electric current in any conductor through which it passes. Strong radiation can induce current capable of delivering an electric shock to persons or animals ... image.gsfc.nasa.gov poetry workbook storms.html ref blackouts as in 1989 , and interference with electromagnetic ... ignite them. This risk is commonly referred to as Hazards EM Ordnance HERO Hazards of ElectromagneticRadiation to Ordnance . MIL STD 464A mandates assessment of HERO in a system, but Navy document OD 30393 provides design principles and practices for controlling electromagnetic hazards to ordnance. On the other hand, the risk related to fueling is known as Hazards EM for Fuel HERF Hazards of ElectromagneticRadiation to Fuel . NAVSEA OP 3565 Vol. 1 could be used to evaluate HERF, which states ... W emitter . Biological hazards The best understood biological effect of electromagnetic fields is to cause ... more details
wiktionary ElectromagneticElectromagnetic may refer to Electromagnetic field Electromagnetic force ElectromagneticradiationElectromagnetic spectrum Electromagnetic therapy alternative medicine , use of electromagnetism in alternative medicine Electromagnetism disambig ... more details
and instead of producing charged ions when passing through matter, the electromagneticradiation has ... of the molecule. Fast neutron s can directly damage DNA in this fashion. Electromagneticradiation Main Electromagneticradiation Image Electromagnetic Spectrum.png thumb 180px The electromagnetic spectrum Electromagneticradiation sometimes abbreviated EMR takes the form of self propagating waves ... in phase perpendicular to each other and to the direction of energy propagation. Electromagneticradiation ..., is sensed by the eye of various organisms. Ionizing radiation consists of subatomic particles or electromagnetic ... an atom or molecule depends on its frequency. Radiation on the short wavelength end of the electromagnetic ... possible electromagneticradiation frequencies. ref name ICNIR2003 The electromagnetic spectrum usually just spectrum of an object is the characteristic distribution of electromagneticradiation ..., is a very narrow range of electromagneticradiation of a wavelength that is visible to the human ... to light as electromagneticradiation of all wavelengths, whether visible or not. Infrared Infrared IR light is electromagneticradiation with a wavelength between 0.7 and 300 micrometres, which equates ... of electromagneticradiation with wavelengths in the electromagnetic spectrum longer than infrared ... is converted to electromagneticradiation. The emitted wave frequency of the thermal radiation is a probability ... wavelength. The radiation emitted covers the entire electromagnetic spectrum and the intensity power .... Theoretically a black body emits electromagneticradiation over the entire spectrum from very low ... communication systems use forms of electromagneticradiation. Variations in the intensity of the radiation ... radiation , 3 kelvin K blackbody radiation that fills the Universe Electromagnetic spectrum ...Other uses File Alfa beta gamma radiation penetration.svg 300px thumb right This figure illustrates the relative abilities of three different types of ionizing radiation to penetrate solid matter. Alpha ... more details
Electromagnetic flux may refer to one of the following Flux or flux density of electromagneticradiation Electric flux and magnetic flux . disambig ... more details
Electromagnetic therapy or Electromagnetic field therapy may refer to Bioelectromagnetics , the study of how electromagnetic fields interact with and influence biological processes. Electrotherapy , the use of electrical or electromagnetic energy in medicine Electromagnetic therapy alternative medicine , the use of electromagneticradiation to treat disease. Evidence of efficacy is lacking. Pulsed Electromagnetic Field Therapy , or PEMF , the use of weak electromagnetic fields to initiate osteogenesis . disambig ... more details
In telecommunication , the term electromagnetic environment EME has the following meanings For a telecommunications system , the spatial distribution of electromagnetic field s surrounding a given site. The electromagnetic environment may be expressed in terms of the spatial and temporal distribution of electric field strength volt s per metre , irradiance watt s per square metre , or energy density joule s per cubic metre . The resulting product of the Power physics power and time distribution, in various frequency ranges, of the radiated or conducted electromagnetic Emission electromagneticradiation emission levels that may be encountered by a military force, system, or platform when performing its assigned mission in its intended operational environment. It is the sum of electromagnetic interference electromagnetic pulse hazards of electromagneticradiation to personnel, ordnance, and volatile materials and natural phenomena effects of lightning and p static. Source FS1037C MS188 DODDIC Category Electromagneticradiation Category Telecommunications telecomm stub pl rodowisko elektromagnetyczne ru ... more details
. How electromagnetic shielding works Electromagneticradiation consists of coupled electric field electric ... relative to the magnetic field. The result is that electromagneticradiation is reflected from the surface ... electromagneticradiation, the above mentioned adjustments take a non negligible amount of time. But then the radiation energy, as far as it is not reflected, is absorbed by the skin unless it is extremely thin , so in this case there is no electromagnetic field inside either. This is called the skin ... radiation Category Electromagnetic compatibility cs Elektromagnetick st n n de Abschirmung Elektrotechnik ...refimprove date March 2010 Image Electromagnetic shielding inside mobile phone.jpg thumb Electromagnetic shielding cages inside a disassembled mobile phone . Electromagnetic shielding is the process of reducing the electromagnetic field in a space by blocking the field with barriers made of electrical ... through which the cable runs. Electromagnetic shielding that blocks radio frequency electromagneticradiation is also known as RF shielding . The shielding can reduce the Coupling electronics coupling of Radio frequency radio waves , electromagnetic fields and electrostatic field s, though not static ... of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic field. Materials used Typical materials used for electromagnetic shielding include sheet metal ... the wavelength of the radiation that is being kept out, or the enclosure will not effectively approximate ... layers One example is a shielded cable , which has electromagnetic shielding in the form of a wire ... electromagnetic and electrostatic fields. The door of a microwave oven has a screen built into the window ... electromagnetic shielding for computers and keyboards to prevent passive monitoring of keyboard ... Compromising Electromagnetic Emanations of Wired and Wireless Keyboards date 2009 06 01 author Martin ... around them, so that fields passing through the holes do not excite opposing electromagnetic fields ... more details
cgi bin cuu Value?h ref Whenever electromagnetic waves exist in a Transmission medium medium with matter , their wavelength is decreased. Wavelengths of electromagneticradiation, no matter what medium ... hydrogen atom s Emission electromagneticradiation emit a radio wave photon which has a wavelength ... interaction with matter. Types of radiation Image Electromagnetic Spectrum.png thumb 300px The electromagnetic ..., although the latter is, strictly speaking, not electromagneticradiation at all see near and far ... accessdate 2010 10 16 ref Also, the region of the spectrum of the particular electromagneticradiation ... series transitions, putting them in the ultraviolet UV part of the electromagnetic spectrum. Now this radiation ... transmittance or opacity to various wavelengths of electromagneticradiation. The super high frequency ... the violet end. Electromagneticradiation with a wavelength between 380 nanometre nm and 760 nm ... wavelengths, however, the information carried by electromagneticradiation is not directly detected ... Electromagnetic spectroscopy Ionizing radiation List of international common standards ... 20090210.pdf Poster ElectromagneticRadiation Spectrum 992 kB EMSpectrum Category Electromagnetic ... some radiation s are marked as N for no in the diagram, some waves do in fact penetrate the atmosphere , although extremely minimally compared to the other radiations. The electromagnetic spectrum is the range of all possible frequencies of electromagneticradiation . ref cite web url http imagine.gsfc.nasa.gov docs dict ei.html em spectrum title Imagine the Universe Dictionary ref The electromagnetic spectrum of an object is the characteristic distribution of electromagneticradiation emitted or absorbed by that particular object. The electromagnetic spectrum extends from low frequencies used for modern radio to gamma radiation at the short wavelength end, covering wavelengths from thousands ... Glenn Elert url http hypertextbook.com physics electricity em spectrum title The Electromagnetic ... more details
Electromagnetic levitation EML , patented by Muck in 1923 ref O. Muck. German patent no. 42204 Oct. 30, 1923 ref , is one of the oldest levitation techniques used for containerless experiments. ref citation author Paul C. Nordine, J. K. Richard Weber, and Johan G. Abadie journal Pure and Applied Chemistry title Properties of high temperature melts using levitation year 2000 volume 72 pages 2127 2136 doi 10.1351 pac200072112127 ref The technique enables the levitation of an object using electromagneticradiation . A typical EML coil has reversed winding of upper and lower sections energized by an Radio frequency power supply. References reflist Category Electromagnetism physics stub ... more details
surfaces subjected to electromagneticradiation the photon was historically although strictly unnecessarily ... the radiation reaction force . The electromagnetic field as a feedback loop The behavior of the electromagnetic ... directly or indirectly. Electromagneticradiation, being generated by everything that uses electricity ... areas of industry. The use of electromagneticradiation is seen in various disciplines. For example, X rays are high frequency electromagneticradiation and are used in radiography in medicine. Other forms of electromagneticradiation are used in radio astronomy and radiometry in telecommunications ... concerns Radio frequency RF see Electromagneticradiation and health Light see Laser safety Ultraviolet ... Electrotherapy Electromagnetic therapy Fundamental interaction ElectromagneticradiationElectromagnetic ...Electromagnetism cTopic Classical electromagnetism Electrodynamics An electromagnetic field also EMF ... . It affects the behavior of charged objects in the vicinity of the field. The electromagnetic field extends indefinitely throughout space and describes the electromagnetism electromagnetic interaction ... charges and currents interact with the electromagnetic field is described by Maxwell s equations and the Lorentz force law . From a Classical physics classical perspective, the electromagnetic ... Subatomic particle particle s. Structure of the electromagnetic field The electromagnetic field may ... through the electromagnetic field between any two locations. For instance, the metal atoms ... radiation of low frequency , but problems are found at high frequencies see ultraviolet catastrophe . Discrete structure The electromagnetic field may be thought of in a more coarse way. Experiments reveal that in some circumstances electromagnetic energy transfer is better described as being ... radiation so long as one remains in the linear regime increases only the number of electrons ejected, and has almost no effect on the energy distribution of their ejection. Only the frequency of the radiation ... more details
Cleanup date June 2010 Electromagneticradiation weapons are a type of directed energy weapon s which use electromagneticradiation to deliver heat, mechanical, or electrical energy to a target to cause ... non lethal weapons, electromagnetic weaponry poses health threats to humans&hl en&ct clnk&cd 2&gl us ref Some bio effects of electromagneticradiation weapons include effects to the human central ..., vertigo, incontinence, nausea, disorientation, or other systemic discomfort. Electromagneticradiation weapons may cause cumulative damage to the human body. Since electromagnetic weapons and the elecromagnetic ... targets generally, depending on the technology. An electromagnetic pulse laser weapon can ... has lethal capabilities. When used against equipment, directed electromagnetic energy weapons can operate similarly to omnidirectional electromagnetic pulse EMP devices, by inducing destructive ... most directed and undirected EMP effects. When used against humans electromagnetic weapons can have ... radiation, like other radio frequency radiation, can easily penetrate most common building materials and 3 that with specialized antennas the radiation and its effects can be focused on either ... be directed at the enemy with some precision by specialized microwave type radiation antennas. See ... devices use low frequency microwave radiation which can be made to closely mimic and interact with normal ... of electromagnetic pulses emitted by laser induced plasma channels. According to Dr. Jonathan Moreno ... and hypervelocity physics related to electromagnetic weapons. ref Exploiting Technical Opportunities ... lethal, electromagnetic weapons can, under the right conditions or in the wrong hands, pose health ... by Matthew Swibel 04.23.07 Forbes.com ref Electromagnetic weapons, including high power microwaves ... used for other purposes. The degree of exposure to electromagnetic fields by Iraqi civilians and battlefield ... 26sub release id 3D11373 26view 3Dall electromagnetic weapons heart attacks&hl en&ct clnk&cd 1&gl ... more details
wrote that considering only whether electromagneticradiation was a causative factor was not meeting ..., the scientific community, and human health. Electromagneticradiation and health Mobile phone ...Electromagnetic hypersensitivity EHS , also referred to as electrohypersensitivity and electrical sensitivity ES , is a set of claims of adverse medical symptoms purportedly caused by exposure to electromagnetic field s. ref name who Although the thermal effects of electromagnetic fields on the body are established, self described sufferers of electromagnetic hypersensitivity report responding to non ionizing electromagnetic fields or electromagneticradiation at intensities well below the limits permitted by international Mobile phone radiation and health Safety standards and licensing radiation ... described sufferers of electromagnetic hypersensitivity are unable to distinguish between exposure to real and fake electromagnetic fields, ref name RubinProvReview2005 ref name Roosli2008 and it is not recognized ... date September 2010 Symptoms and severity Initial reports of electromagnetic hypersensitivity in the medical ..., and recent surveys of electromagnetic hypersensitivity sufferers have found that base stations for mobile ... Symptoms of ill health ascribed to electromagnetic field exposure a questionnaire survey journal ... doi 10.1078 1438 4639 00269 ref Self described electromagnetic hypersensitivity sufferers tend .... ref name irvine2005 http www.hpa.org.uk Publications Radiation HPARPDSeriesReports HpaRpd010 Definition, epidemiology and management of electrical sensitivity , Irvine, N, Report for the Radiation ... web last Sage first Cindy authorlink coauthors title Microwave And Radiofrequency Radiation Exposure ... Environmental Intolerance . ref name irvine2005 Levitt proposed ties between electromagnetic fields ... . ref Cite book last Levitt first B. Blake authorlink coauthors title Electromagnetic Fields ... pmid 15925670 doi 10.1016 j.puhe.2004.07.011 ref show that over 50 of people reporting electromagnetic ... more details
File Hiss electromagnetic palmer 2003 01 30 T215005.png thumb en Very low frequency VLF en spectrogram spectrogram of electromagnetic en hiss electromagnetic hiss , as received by the en Stanford University Stanford University VLF group s wave receiver at en Palmer Station Palmer Station , en Antarctica Antarctica . The hiss can be seen between 500 Hz and 4000 Hz, sandwiched between components of en radio atmospheric sferics Electromagnetism Electromagnetic hiss is a naturally occurring Extremely Low Frequency Very Low Frequency electromagnetic wave i.e., 300 Hz 10 kHz that is generated in the plasma physics plasma of either the Earth s ionosphere or magnetosphere . Its name is derived from its incoherent, structureless spectral properties which, when played through an audio system, sound like white noise hence the onomatopoeia onomatopoetic name, hiss . Varieties Hiss may be observed in any of several varieties depending on local time and L shell of the observer ref Cite book last Sonwalkar first Vikas title Handbook of Atmospheric Electrodynamics, vol. II publisher CRC Press year 1995 location Boca Raton, FL pages 407 460 isbn 978 0849325205 ref Plasmaspheric hiss is generally observed within the plasmasphere , peaking in frequency slightly below 1 kHz and rarely exceeding 3 kHz. Exo hiss and ELF hiss are two varieties of hiss observed outside of the plasmasphere ... on OGO 2 and at Byrd Station in terms of incoherent Cerenkov radiation journal J. Geophys. Res ... discrete Dawn chorus electromagnetic chorus emissions ref Cite journal last1 Santol k first1 O. last2 ... Generation via electromagnetic impulses from terrestrial lightning , specifically via lightning generated ... first6 B. W. title On the origin of whistler mode radiation in the plasmasphere journal J. Geophys ... 111 year 2006 doi 10.1029 2006JA011707 ref See also Dawn chorus electromagnetic Whistler radio References Reflist Atmospheric electricity DEFAULTSORT Hiss Electromagnetic Category Electrical phenomena ... more details
EMI coupling modes.png thumb 450px center The four electromagnetic interference EMI coupling modes. There are four basic coupling mechanisms Electrical conductor conductive , Capacitor capacitive , Electromagnetic induction magnetic or inductive, and Electromagneticradiation radiative . Any coupling ... . The furniture has to be made of wood or plastic, and not metal Electromagnetic compatibility ... and reception of electromagnetic energy with reference to the unwanted effects Electromagnetic interference ... electromagnetic environment, of different equipment which use electromagnetic phenomena, and the avoidance .... Emission issues are related to the unwanted generation of electromagnetic energy by some source ... of unplanned electromagnetic disturbances. Interference, or noise, mitigation and hence electromagnetic compatibility is achieved primarily by addressing both emission and susceptibility ... of interference main Electromagnetic interference Electromagnetic interference divides into several ... Electromagnetic Pulse, EMP, also sometimes called Transient disturbance, arises where the source ... or even contact. Lightning Electromagnetic Pulse LEMP , although typically a short series of pulses. atomic nucleus Nuclear Electromagnetic Pulse NEMP , as a result of a nuclear explosion. Non Nuclear Electromagnetic Pulse NNEMP weapons. Electric power transmission Power Line Surges Pulses Sources ... along the receiving conductor. Radiative coupling Radiative coupling or electromagnetic coupling .... Source and victim act as radio antennas the source emits or radiates an electromagnetic wave which ... The damaging effects of electromagnetic interference pose unacceptable risks in many areas of technology ... of electromagnetic interference EMI and assurance of EMC comprises a series of related disciplines ... Committee 77 TC77 , working on electromagnetic compatibility between equipment including ... Special Committee on Radio Interference. The Advisory Committee on Electromagnetic Compatibility ... more details
In telecommunication , electromagnetic survivability is the ability of a system , subsystem, or equipment to resume functioning without evidence of Degradation telecommunications degradation following temporary exposure to an adverse electromagnetic environment . The system, subsystem, or equipment performance may be degraded during exposure to the adverse electromagnetic environment, but the system will not experience permanent damage, such as electronic component component burnout, that will prevent proper operation when the adverse electromagnetic environment is removed. References FS1037C MS188 Category Telecommunications telecommunications stub ... more details
Orphan date February 2009 Electromagnetic buoyancy EMB is a force that opposes Lorentz force EMW during electromagnetic phoresis of small particles or droplets in an aqueous medium. Though this force is still being researched, it has been clearly observed in experimental procedures. Category Electromagnetism electromagnetism stub ... more details
Image Electromagnetic oscillograph img 1647.jpg thumb An electromagnetic oscillograph is an oscillograph which measures variations of electric current by having it go through a magnetic coil. Variations in current induce momentum in the coil, which can be directly measured. The electromagnetic oscillograph was invented by William Duddell . Some models utilise a mirror which reflects a beam of light, allowing measurement of minute movements of the coil. Other were fitted with a hand, possibly fitted with a pen to record values. External links http chem.ch.huji.ac.il history duddell.html William du Bois Duddell http www.freepatentsonline.com 2466691.html Electromagnetic oscillograph Category Measuring instruments Category British inventions ... more details
Orphan date February 2009 An Electromagnetism Electromagnetic Log , sometimes called an EM Log , measures the speed of a vessel through water. It operates on the principle that when a Electrical conductor conductor such as water passes through an electromagnetic field, a voltage is created and the amount of voltage created increases as the speed of the conductor increases. The process is the EM Log creates an electromagnetic field . a voltage is induced in the water the magnitude of the voltage varies depending upon the speed of the water flow past the sensor. the EM Log measures the voltage created and translates this into the vessel s speed through water. External links http www.agiltd.co.uk marine instrumentation agilog speed log Category Navigational equipment electronics stub ... more details
An Electromagnetism electromagnetic cavity is a cavity that acts as a container for electromagnetic field s such as photon s, in effect containing their wave function inside. The size of the cavity determines the maximum photon wave length that can be trapped. Additionally, it produces quantized energy level s for trapped charged particles like electrons and protons . The earth s magnetic field in effect places the earth in an electromagnetic cavity. Physical description of electromagnetic cavities Electromagnetic cavities are represented by potential well s, also called boxes , which can be of limited or unlimited depth V sub 0 sub . Quantum mechanic boxes are described by the time independent Schr dinger equation div align center math left frac hbar 2 2m nabla 2 V mathbf r right psi mathbf r E psi mathbf r math div with the additional boundary condition s the wave function is confined to the box infinite deep potential well or approaches zero as the distance from the wall increases to infinity, thus normalisable the wave function must be continuous function continuous the derivative of the wave function must be continuous which leads to real solutions for the wave functions if the net energy of the particle is negative., i.e. if the particle is in a bound state . Applications of electromagnetic cavities Electrons which are trapped in an electromagnetic cavity are in a bound state and thus organise themselves as they do in a regular atom , thus expressing chemical like behaviour. Several researchers have proposed to develop programmable matter by varying the number of trapped electrons in those cavities. http www.wired.com wired archive 9.10 atoms.html The discrete energy levels of electromagnetic cavities are exploited to produce photons of desired frequencies and thus are essential for nano or submicrometre scale laser devices. See also Cavity resonator Crab cavity Schumann resonance Optical cavity Quantum dot Category Electromagnetism ... more details
Wikify date April 2010 An electromagnetic diaphragm is a form of capacitive sensor used on an electronic stethoscope. The diaphragm is coated with a conductive material. Behind the diaphragm, a conductive plate is positioned behind and parallel to the diaphragm, so that the two conductive elements form a capacitor. Capacitance is a function of plate area , dielectric properties of the space between the conductors, and the distance between the conductors. It is this latter parameter which is modulated by vibration such that the capacitance varies with the distance between the electromagnetic diaphragm and the plate, forming an acoustic sensor. The electromagnetic diaphragm is a form of capacitive sensor, and shares properties with condenser microphones. The difference between the electromagnetic diaphragm and a condenser microphone is that a condenser microphone operates on the basis of air transmission, has a very thin membrane instead of a diaphragm, and cannot be placed against a body to sense sounds within the body. The electromagnetic diaphragm for stethoscopes was patented by Clive Smith in 2002 and is used on Thinklabs electronic stethoscopes. See also Microphone External links http patft.uspto.gov netacgi nph Parser?Sect1 PTO2&Sect2 HITOFF&p 1&u 2Fnetahtml 2FPTO 2Fsearch bool.html&r 2&f G&l 50&co1 AND&d PTXT&s1 22transducer sensing body sounds 22&OS 22transducer sensing body sounds 22&RS 22transducer sensing body sounds 22 Electromagnetic Diaphragm Patent Ref1 http patft.uspto.gov netacgi nph Parser?Sect1 PTO2&Sect2 HITOFF&p 1&u 2Fnetahtml 2FPTO 2Fsearch bool.html&r 1&f G&l 50&co1 AND&d PTXT&s1 22transducer sensing body sounds 22&OS 22transducer sensing body sounds 22&RS 22transducer sensing body sounds 22 Electromagnetic Diaphragm Patent Ref2 http www.thinklabsmedical.com electronic stethoscope technology electromagnetic diaphragm emd 102.html Stethoscope Category Medical equipment Category Audio engineering ... more details
electromagnetism cTopic Electrodynamics An electromagnetic pump is a pump that moves liquid metal or any electrically conductive liquid magnetic material using electromagnetism . A magnetic field is set at right angles to the direction the liquid moves in, and a current is passed through it. This causes an electromagnetic force that moves the liquid. Applications include pumping liquid metal through a cooling system. electromagnetism stub Category Pumps ... more details
Electromagnetic Testing ET , as a form of nondestructive testing , is the process of inducing electric current s or magnetic field s or both inside a test object and observing the electromagnetism electromagnetic response. If the test is set up properly, a defect inside the test object creates a measurable response. The term Electromagnetic Testing is often intended to mean simply Eddy Current Testing ECT . However with an expanding number of electromagnetic and magnetic test methods, Electromagnetic Testing is more often used to mean the whole class of electromagnetic test methods, of which Eddy Current Testing is just one. Common Methods of Electromagnetic Testing Eddy Current Testing ECT is used to detect near surface cracks and corrosion in metallic objects such as tubes and aircraft fuselage and structures. ECT is more commonly applied to nonferromagnetic materials, since in ferromagnetic materials the skin effect depth of penetration is relatively small. Remote field testing RFT is used for nondestructive testing NDT of steel tubes and pipes. Magnetic flux leakage Magnetic flux leakage testing MFL is also used for nondestructive testing NDT of steel tubes and pipes. At present RFT is more commonly used in small diameter tubes and MFL in larger diameter pipes over long travel distances. Wire rope testing is MFL applied to steel cables, to detect broken strands of wire. Magnetic particle inspection MT or MPI is a form of MFL where small magnetic particles in the form of a powder or liquid are sprayed on the magnetized steel test object and gather at surface breaking cracks. Alternating Current Field Measurement ACFM is similar to eddy current applied to steel. Its most ... without removing insulation. References Hugo L. Libby, Introduction to Electromagnetic Nondestructive .... 5, http www.asnt.org publications handbook third 3et.htm Electromagnetic Testing . William Lord, http www.asnt.org publications materialseval June06d.pdf Electromagnetic NDT Techniques A 40 Year ... more details
Infobox Company name Electromagnetic Geoservices ASA logo type Public company Public ose EMGS genre foundation founder location city Trondheim location country Norway location locations area served Global key people Roar Bekker small Chief Executive Officer CEO small industry Petroleum industry Petroleum products services marine EM technology revenue operating income net income owner num employees parent divisions subsid slogan homepage http www.emgs.com emgs.com footnotes intl yes http www.emgs.com Electromagnetic Geoservices ASA ose EMGS or http www.emgs.com EMGS is a Norway Norwegian geophysics geophysical company using proprietary marine electromagnetic EM technology to support oil and gas companies in their search for offshore hydrocarbons. EMGS pioneered marine EM technology an emerging and environmentally benign exploration method in 2002 with the first successful application and commercialization of controlled source electro magnetic surveying technology CSEM . Marine EM, or CSEM, is an emerging exploration method that uses electromagnetic energy to detect resistive bodies including hydrocarbon reservoirs beneath the seabed. The company has conducted over 450 surveys to reduce exploration risk and improve drilling success rates across the world s mature and frontier basins. The technology is used in water depths ranging from 48 to 3392 metres . EMGS technology is changing how oil and gas operators are searching for hydrocarbons in frontier and mature offshore basins. The company acquires 3D EM and marine magnetotelluric data, which are used to assess formation resistivity before drilling, and interpret and integrate this information with other geo data to aid exploration decision making. 3D EM data is routinely used for lead generation, prospect ranking and volume assessments. Main offices and research department are located in Trondheim, Norway . The company was listed ... Engineering companies of Norway Category Companies based in Trondheim de Electromagnetic Geoservices ... more details
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