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Topic: Control of electromagnetic radiation


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  Electromagnetic radiation Summary
The physics of electromagnetic radiation is electrodynamics, a subfield of electromagnetism.
EM radiation with a wavelength between approximately 400 nm and 700 nm is detected by the human eye and perceived as visible light.
Electromagnetic waves as a general phenomenon were predicted by the classical laws of electricity and magnetism, known as Maxwell's equations.
www.bookrags.com /Electromagnetic_radiation   (2799 words)

  
 Olympus Microscopy Resource Center: Light and Color - Electromagnetic Radiation   (Site not responding. Last check: 2007-10-12)
Electromagnetic radiation, the larger family of wave-like phenomena to which visible light belongs (also known as radiant energy), is the primary vehicle transporting energy through the vast reaches of the universe.
The term electromagnetic radiation, coined by Sir James Clerk Maxwell, is derived from the characteristic electric and magnetic properties common to all forms of this wave-like energy, as manifested by the generation of both electrical and magnetic oscillating fields as the waves propagate through space.
A standard measure of all electromagnetic radiation is the magnitude of the wavelength (in a vacuum), which is usually stated in units of nanometers (one-thousandth of a micrometer) for the visible light portion of the spectrum.
www.olympusmicro.com /primer/lightandcolor/electromagintro.html   (4927 words)

  
 CDC Radiation Emergencies | Glossary of Radiological Terms
Decay, radioactive: disintegration of the nucleus of an unstable atom by the release of radiation.
When ionizing radiation passes through the tube, a short, intense pulse of current passes from the negative electrode to the positive electrode and is measured or counted.
X-ray: electromagnetic radiation caused by deflection of electrons from their original paths, or inner orbital electrons that change their orbital levels around the atomic nucleus.
www.bt.cdc.gov /radiation/glossary.asp   (6816 words)

  
 Electromagnetic radiation - Wikipedia, the free encyclopedia
Electromagnetic radiation can be imagined as a self-propagating transverse oscillating wave of electric and magnetic fields.
Electromagnetic radiation is generally described as a self-propagating wave in space with electric and magnetic components.
EM radiation carries energy and momentum, which may be imparted when it interacts with matter.
en.wikipedia.org /wiki/Electromagnetic_radiation   (1959 words)

  
 The Astrophysics Spectator: Thermal Electromagnetic Radiation
All processes in astronomical sources try to drive radiation to a fl-body spectrum, because this is the most probable state for the distribution of energy among photons; in thermodynamic terms, this is the state with the highest entropy.
The radiation that emerges from a star's photosphere is generally close to a fl-body spectrum.
An important instance of fl-body radiation is the 3° background radiation of the universe.
www.astrophysicsspectator.com /topics/radiation/BlackBody.html   (764 words)

  
 Dictionary of Military Terms   (Site not responding. Last check: 2007-10-12)
It is the sum of electromagnetic interference; electromagnetic pulse; hazards of electromagnetic radiation to personnel, ordnance, and volatile materials; and natural phenomena effects of lightning and precipitation static.
electromagnetic jamming — The deliberate radiation, reradiation, or reflection of electromagnetic energy for the purpose of preventing or reducing an enemy’s effective use of the electromagnetic spectrum, and with the intent of degrading or neutralizing the enemy’s combat capability.
That division of electronic warfare involving the use of electromagnetic energy, directed energy, or antiradiation weapons to attack personnel, facilities, or equipment with the intent of degrading, neutralizing, or destroying enemy combat capability and is considered a form of fires.
www.militaryfactory.com /military_terms_dictionary_E.asp   (7474 words)

  
 Radiation Basics
Radiation is energy that comes from a source and travels through space and may be able to penetrate various materials.
The radiation one typically encounters is one of four types: alpha radiation, beta radiation, gamma radiation, and x radiation.
Gamma radiation and/or characteristic x rays frequently accompany the emission of alpha and beta radiation during radioactive decay.
hps.org /publicinformation/ate/faqs/radiation.html   (3683 words)

  
 Photonic band gap materials and method of preparation thereof - Patent 5385114
The major applications of photonic band gap materials are likely to be in the areas of the use and control of electromagnetic radiation in the wavelength range extending from the millimeter or microwave region to the ultraviolet region.
We further recognize that the photonic band gap material that we have produced can be tuned to operate with electromagnetic radiation in distinct portions of the electromagnetic spectrum by at least three methods, which modify or control the physical dimensions of the photonic band gap material.
Control of such dimensions is clearly a feature of our fabrication method, either by liquid or gaseous infiltration in to a template solid having predetermined pore sizes, or by subsequent control of the thickness of deposition of solid by gaseous infiltration in a chemical vapor deposition process.
www.freepatentsonline.com /5385114.html   (5467 words)

  
 Radiation
Electromagnetic radiation of longer wavelength is emitted in all these instruments, but is too weak to be usable in routine studies.
The power radiated by electrons in a synchrotron storage ring is very large, and must be replaced during each circuit by a kick from a radiofrequency oscillator.
Figure 2.l8 Radiation pattern for an electron in a circular orbit for (a) the reference frame of the electron, and (b) the reference frame of the observer.
cars9.uchicago.edu /JoeSmith/radiation.htm   (10292 words)

  
 Part I - Electromagnetic Radiation   (Site not responding. Last check: 2007-10-12)
Electromagnetic radiation is defined as electric and magnetic energy, or fields, traveling through space.
Physicists describe such radiation in terms of its strength (the force the electric and magnetic fields exert) and its frequency (the number of times per second that the fields change direction or polarity).
Electromagnetic radiation at frequencies beginning at visible light and proceeding downward is called non-ionizing radiation.
www.noradcorp.com /1tutor.htm   (636 words)

  
 Electromagnetic Radiation Spectrum (Definitrions, Sources, Symptoms, Testing Equipment & Procedures, Exposure ...
Electromagnetic Radiation Spectrum (0Hz to 10^27 Hz) (Definitions, Physics, and Properties, Sources of Radiation, Overexposure Symptoms, Testing Equipment and Procedures, Exposure Limits, Standards and Laws, Shielding and Jamming, Medical and Technical Protection, EMF Agencies, Organizations To Contact For Help, Reference Materials) * 2.
Radiation refers to the transmutation of energy in the form of waves and of streams of atomic particles through space.
Sources of illegal nonionized radiation, emf weapons, directed energy, and mind control attacks: International organizations (corporations, secret societies, and other nation states) and organized criminal organizations may be responsible for mind control, emf weapon and directed energy radiation attacks, and nonconsensual radiation experimentations on U.S. and world citizens.
www.rhfweb.com /hweb/shared2/Newrad.html   (4270 words)

  
 Physical Agent Data Sheet/Ultraviolet Radiation
Ultraviolet (UV) is the name for a band of energy on the electromagnetic spectrum that lies between visible light and x-rays.
These threshold limit values (TLVS) refer to ultraviolet radiation in the spectral region between 200 and 400 nm and represent conditions under which it is believed that nearly all workers may be repeatedly exposed without adverse effect.
These values should be used as guides in the control of exposure to continuous sources where the exposure duration shall not be less that 0.1 sec (Figure 1).
ehsrms.uaa.alaska.edu /UVRadiationPADS.htm   (1277 words)

  
 Radiation
The energy associated with electromagnetic radiation depends on its frequency (or wavelength); the greater the frequency (and shorter the wavelength), the higher the energy.
Of the various forms of electromagnetic radiation, x-radiation and gamma radiation represent the greatest relative hazard because of their greater energy content and corresponding greater potential for damage.
Less energetic forms of electromagnetic radiation, such as microwave radiation, lack the ability to ionize atoms and molecules and are classified as "non ionizing" radiation.
www.sgha.net /radiation.html   (2365 words)

  
 Safety and Health Topics: Non-Ionizing Radiation
Non-ionizing radiation is described as a series of energy waves composed of oscillating electric and magnetic fields traveling at the speed of light.
Non-ionizing radiation is found in a wide range of occupational settings and can pose a considerable health risk to potentially exposed workers if not properly controlled.
Ultraviolet radiation (UV) has a high photon energy range and is particularly hazardous because there are usually no immediate symptoms of excessive exposure.
www.osha.gov /SLTC/radiation_nonionizing/index.html   (386 words)

  
 Leveltherm, Thermal mold level control, continuous mold casting
The problem is, for a radiation system indicate an accurate mold level, the radioactive cloud density must be high.
The stiffer controls are only applied when needed, which accounts for it’s uncommonly smooth control.
Control failures are nearly non-existent, and if they do occur, they are self evident due to Allen-Bradley’s superior hardware diagnostics.
www.leveltherm.com   (1134 words)

  
 Definition: control of electromagnetic radiation   (Site not responding. Last check: 2007-10-12)
Measures taken to minimize unintended electromagnetic radiation emanating from a system or component and to minimize electromagnetic interference.
Note: Control of electromagnetic radiation is exercised for purposes of security and the reduction of interference, especially on ships and aircraft.
A national operational plan to minimize the use of electromagnetic radiation in the United States and its possessions and the Panama Canal Zone in the event of attack or imminent threat thereof, as an aid to the navigation of hostile aircraft, guided missiles, or other devices.
www.atis.org /tg2k/_control_of_electromagnetic_radiation.html   (122 words)

  
 Utah Division of Radiation Control: Non-ionizing Radiation
Non-ionizing radiation is electromagnetic radiation that does not have sufficient energy to remove electrons from the outer shells of atoms.
Types of non-ionizing radiation are: ultraviolet (UV), visible light, infrared (IR), microwave, radio (and television), and extremely low frequency (ELF, sometimes referred to as EMF or ELF-EMF).
Non-ionizing radiation is produced by a wide variety of products in the home and in the workplace, from lasers to power lines, tanning beds to household appliances, cellular phones to ham radios.
www.radiationcontrol.utah.gov /Drc_nion.htm   (269 words)

  
 Electro-optical glazing structures having total-reflection and transparent modes of operation for use in dynamical ...   (Site not responding. Last check: 2007-10-12)
Electro-optical glazing structures having bi-directional control of electromagnetic radiation during total-reflection, semi-transparent and totally-transparent modes of operation
wherein electromagnetic radiation within a first prespecified bandwidth falling incident upon said electro-optical panel is totally reflected from said electro-optical panel without absorption when said electro-optical panel is switched to said first optical state of operation, and
wherein electromagnetic radiation within a second prespecified bandwidth falling incident upon said electro-optical panel is transmitted through said electro-optical panel without absorption when said electro-optical panel is switched to said second optical state of operation.
www.delphion.com /details?pn=US06912018__   (1108 words)

  
 CONELRAD
CONELRAD (Control of Electromagnetic Radiation) was a planned method of emergency broadcasting to the public of the United States in the event of World War III.
It served two purposes; to prevent Soviet bombers from homing in on American cities by using broadcasting stations as beacons, and to provide essential Civil Defense[?] information.
Fictional treatments of how CONELRAD would work can be found in the novel Alas, Babylon by Pat Frank[?], and the 1962 movie Panic in the Year Zero[?].
www.ebroadcast.com.au /lookup/encyclopedia/co/CONELRAD.html   (171 words)

  
 Electromagnetic Safety Standards   (Site not responding. Last check: 2007-10-12)
Electromagnetic radiation plays an important role in a wide variety of common day-to-day activities.
Voluntary standards have been developed by several organizations to act as guidelines for the design of equipment that can generate electromagnetic fields so that the safe operation of that equipment can be assured.
These papers summarize an even larger body of laboratory and epidemiological studies and serve as the basis for defining the limits of safe exposure to electromagnetic radiation for devices ranging from cellular phones to amateur radio transmitters, to TV broadcasting stations.
www.haarp.alaska.edu /haarp/std.html   (321 words)

  
 Radiation homepage
Ionising radiation occurs as either electromagnetic rays (such as X-rays and gamma rays) or particles (such as alpha and beta particles).
Ionising radiation is used in medicine (for diagnosis and treatment), industry (for measurement and other purposes as well as for producing electricity), research and teaching.
Non-ionising electromagnetic radiation (NIEMR) is the term used to describe the part of the electromagnetic spectrum covering two main regions, namely optical radiation (ultraviolet (UV), visible and infrared) and electromagnetic fields (EMFs) (power frequencies, microwaves and radiofrequencies).
www.hse.gov.uk /radiation/index.htm   (175 words)

  
 Non-absorptive electro-optical glazing structure employing composite infrared reflective polarizing filter (US6559903)   (Site not responding. Last check: 2007-10-12)
When the electro-optical panel is switched to the first optical state of operation, electromagnetic radiation within a first prespecified bandwidth falling incident upon the electro-optical panel is reflected from the electro-optical panel without absorption.
When the electro-optical panel is switched to the second optical state of operation, electromagnetic radiation within a second prespecified bandwidth falling incident upon the electro-optical panel is transmitted through the electro-optical panel without absorption.
wherein electromagnetic radiation within a first prespecified bandwidth falling incident upon said electro-optical panel is reflected from said electro-optical panel without absorption when said electro-optical panel is switched to said first optical state of operation, and
www.delphion.com /details?pn=US06559903__   (1431 words)

  
 Mind Justice - India's Mind Control Tools
Dr. Rao stated, “This technique of using electromagnetic radiation can control the mind of the suicide bomber and make him to leave his target place silently without making any effort to explode the bomb at the given area.” Mr Rao added, “We don’t have this technique available right now.
We have to adopt the technology.” India’s top forensic scientist also discussed “target oriented low frequency portable electromagnetic radiation tools, which could remotely be used by criminal on a person’s body parts and create havoc in respect of brain damage, heartache, kidney failure, liver damage.” Click here for pdf’s of the full newspaper article.
Dr Rao said there are also challenges for forensic experts with respect to target oriented low frequency portable electromagnetic radiation tools, which could remotely be used by criminal on a person’s body parts and create havoc in respect of brain damage, heartache, kidney failure, liver damage.
www.mindjustice.org /india2-06.htm   (4036 words)

  
 Standard Deviation Net Economy, The - Find Articles
A grass-roots organization in favor of more responsible control of electromagnetic radiation in consumer devices this week celebrates one small victory in an ongoing war over radio-frequency standards.
The proposal would lower the limits of acceptable radiation output as well as level the playing field of exposure acceptable for consumers and for workers, reports say.
One of the biggest issues is the effect on the body of thermal and non-thermal results of radiation.
www.findarticles.com /p/articles/mi_zdtne/is_200201/ai_ziff21545   (678 words)

  
 Wiley::Control and Measurement of Unintentional Electromagnetic Radiation
Full and accessible coverage of the key concepts governing the reduction, containment, and measurement of unintentional electromagnetic radiation.
Control and Measurement of Unintentional Electromagnetic Radiation provides a thorough examination of the basic principles underlying the problem, enabling readers to design solutions and applications to combat it effectively.
Basic coverage of the radiation measurement process—from antenna calibration, measurement, geometry, and the measurement environment to test-site construction and validation.
www.wiley.com /WileyCDA/WileyTitle/productCd-0471175641.html   (264 words)

  
 The Truth, 1/20/97
By radiating themselves with these `voice-modulated' microwaves, Sharp and Grover were readily able to hear, identify, and distinguish among the 9 words.
Given the low power levels required for some of these psychophysical effects, and the ability to concentrate certain frequencies of electromagnetic radiation into tight beams, it is worth considering the possibility that low-orbiting satellites could transmit such signals.
Note that the time to guess is not really meaningful by itself (depending on the computer and algorithm) and that significant improvements to both the signal measurements and the pattern matching algorithm are almost surely possible.
www.cs.virginia.edu /~alb/misc/truth.html   (4562 words)

  
 #20 - THE STORY OF CONELRAD
This month's article is concerned with Conelrad ("Control of Electromagnetic Radiation"), a broadcast system that was put in place at the height of the cold war to protect the
  So remote control circuits were installed, with a central control point turning the transmitters on and off in a pseudo-random manner.
Today, the only vestiges of the once-ubiquitous Conelrad program are those triangles on the tuners of old radios, and the Conelrad switch on old RCA transmitters, that switched in that third, odd oscillator (that no-one in this country ever did have a crystal for!).
www.broadcasttechnical.com /articles/20conelrad.htm   (627 words)

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