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Topic: Radiation mode

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	Photonic crystals: a medium exhibiting anomalous cherenkov radiation - Patent 6828575
		The radiation has its origin in both the transition radiation, which occurs when the charge experiences an inhomogeneous dielectric environment provided by the crystal, and the conventional CR in a uniform material, in which coherence is preserved throughout the medium.
		By discussing the general condition for Cherenkov radiation in photonic crystals, it is important to consider a particle of charge q moving at a constant velocity v on a z axis inside a photonic crystal.
		The relative excitation strength of each mode is proportional to the magnitude of e.sub.kn(-g) multiplied by slow functions of k and g on the numerator of Eq.
	www.freepatentsonline.com /6828575.html (3961 words)

	Science Fair Projects - Radiation mode
		For an optical fiber, Radiation mode, or unbound mode, is an unbound mode.
		In an optical fiber, a radiation mode is one having fields that are transversely oscillatory everywhere external to the waveguide, and which exists even at the limit of zero wavelength.
		Radiation modes correspond to refracted rays in the terminology of geometric optics.
	www.all-science-fair-projects.com /science_fair_projects_encyclopedia/Radiation_mode (229 words)

	Radiation mode (Site not responding. Last check: 2007-10-26)
		For an optical fiber, Radiation mode, orunbound mode, is an unbound mode.
		In an optical fiber, a radiation mode is one having fields that aretransversely oscillatory everywhere external to the waveguide, and which existseven at the limit of zero wavelength.
		Specifically, a radiation mode is one forwhich where β is the imaginary part (phase term) of the axial propagation constant, integer l is the azimuthal index of the mode, n(a) is the refractive index, where a is the core radius, and k is the free-space wave number, k = 2π/λ,where λ is the wavelength.
	spanish.therfcc.org /radiation-mode-177401.html (131 words)

	Definition: radiation mode
		Note: In an optical fiber, a radiation mode is one having fields that are transversely oscillatory everywhere external to the waveguide, and which exists even at the limit of zero wavelength.
		is the azimuthal index of the mode, n (a) is the refractive index, where a is the core radius, and k is the free-space wave number, k = 2
		Radiation modes correspond to refracted rays in the terminology of geometric optics.
	www.atis.org /tg2k/_radiation_mode.html (118 words)

	Optical coupling method and optical coupling device - Patent 6253003
		In the optical coupling device as described above, the radiation mode and the guided mode are allowed to interfere with each other in the optical waveguide, whereby the field distribution in the radiation mode is varied depending on the position of the optical waveguide.
		With such a constitution, a light wave in the guided mode propagating through first waveguide 1, the wide straight waveguide, is coupled to the guided mode and radiation mode of second waveguide 2, the narrow straight waveguide, at the coupling portion of first waveguide 1 and second waveguide 2.
		In the optical coupling device of the present invention, this interference of the guided mode and the radiation mode is used to set the length of second waveguide 2 to obtain a desired spot size.
	www.freepatentsonline.com /6253003.html (2646 words)

	Resonant guitar modes
		You may already have some knowledge of the harmonic modes of a stretched string or sound waves in a pipe (see strings and standing waves for some background theory).
		For example, the frequency of the first overtone for a simple vibrating string is twice that of the fundamental, whereas for a soundboard, the (1,0) mode (1st longitudinal overtone) is not twice the frequency of the (0,0) mode (fundamental).
		The (0,0) fundamental mode usually radiates the highest amplitude sound intensity, and the wave fronts radiate outwards in a roughly spherical manner.
	www.phys.unsw.edu.au /music/guitaracoustics/modes.html (581 words)

	Miniaturized intracavity frequency-doubled blue laser - Patent Review 5610934
		The fundamental radiation is obtained by means of the.sup.4 F.sub.3/2 to.sup.4 I.sub.9/2 energy level transition of an active Nd.sup.3+ ion in the Nd:YAlO.sub.3 laser cavity from an upper manifold level having a Stark-level energy of 11,419 cm.sup.-1 to a lower energy level of 670 cm.sup.-1, as shown in FIG.
		Pump radiation, such as mode-matched beam 53, produces lasing in gain medium 23 from which a fundamental radiation 91 having a wavelength of 1.079.mu.m is emitted.
		Pump radiation, such as mode-matched radiation 56, produces lasing in gain medium 73 from which a fundamental radiation 95 having a wavelength of 1.341.mu.m is emitted.
	www.wikipatents.com /5610934.html (7057 words)

	ADS Abstract Service Results
		With this hypothesis, the lack of a strong correlation between the Z mode radiation and AKR is not surprising; the ray paths for the X mode and the Z mode are markedly different, with the former directed upward and the latter downward.
		In addition, it is expected that the generation of the Z mode will be favored only in regions where the ratio of the plasma frequency to the electron cyclotron frequency is greater than or approximately equal to 0.3, that is, where the X mode radiation is suppressed.
		If the fraction of the radiation generated that crosses the cyclotron layer is large, then the argument in favor of the loss cone driven cyclotron maser as the source of the observed Z mode radiation is a strong one.
	www.atmos.ucla.edu /~bhattach/bibliography/hmd.html (233 words)

	Modalities of Cancer Therapy: Principles of Cancer Therapy: Merck Manual Professional
		The final outcome of a dose of radiation depends on numerous factors, including nature of the delivered radiation (mode, timing, volume, dose) and properties of the tumor (cell cycle phase, molecular properties, overall sensitivity to radiation).
		Stereotactic radiation therapy is radiosurgery with precise stereotactic localization of a tumor to deliver a single high dose or multiple, fractionated doses to a small intracranial or other target.
		Radiation therapy combined with surgery (for head and neck, laryngeal, or uterine cancer) or with chemotherapy and surgery (for sarcomas or breast, esophageal, lung, or rectal cancers) improves cure rates and allows for more limited surgery as compared with traditional surgical resection.
	www.merck.com /mmpe/print/sec11/ch149/ch149b.html (2692 words)

	Reducing EMI with differential signaling
		Figure 1 plots the theoretical radiation gain attained by a differential microstrip pair as a function of trace separation.
		The equal and opposite radiation from the adjacent trace is supposed to cancel the radiation from one trace of the differential pair, resulting in a marked reduction in emissions.
		Under FCC class B measurement conditions, the differential-mode radiation from a differential-microstrip pair with 0.5-mm separation should theoretically yield a 40-dB radiation improvement at 1 GHz over the radiation you would measure if you implemented the same signal as a single-ended layout.
	www.sigcon.com /Pubs/edn/ReducingEMI.htm (577 words)

	RadDetect Radiation Detector Dual-Mode Radiation Alert types
		Instant Alert: Exposure to gamma, high energy beta or x-ray radiation of 75 milliRoentgens per hour (mR/hr) is sufficient to trigger the low-level auto-alert which will cause the RadDetect to automatically flash and beep once (in sync) every 2 seconds.
		The flash is emitted by the red LED light on the front of the unit.
		This feature is possible because the microprocessor samples the air 32,768 times a second and gives you instant feedback of the current radiation levels.
	www.nukepills.com /alert_types.htm (347 words)

	HOME: Farfield
		A significant fraction of the energy lost from the barotropic tide is carried away from the Hawaiian Ridge by the radiation of low-mode internal tides.
		The exact amount of energy that might be carried by these waves is unknown at the moment; the estimates have varied considerably the past few years.
		But it is an open question as to the amount of energy that entirely escapes the Hawaiian Ridge to be dissipated in the open ocean or on the opposite shores of the ocean basin.
	staff.washington.edu /dushaw/HOME/baroclinic.html (549 words)

	Sound Radiation from Cylindrical Radiators
		The first mode of the cylinder corresponds to a breathing mode in which the cylinder radius expands and contracts, all parts of the cylinder moving inward or outward at the same rate.
		The second mode of the cylinder is actually a bending mode in which the entire cylinder oscillates back and forth, all parts of the cylinder moving in the same direction at the same time.
		The second mode of the cylinder is called the "bell mode" becuase the cylinder cross sections alternately squishes and expandes along the horizontal and vertical axes, much like the fundamental mode of a vibrating bell.
	www.kettering.edu /~drussell/Demos/radiation/radiation.html (668 words)

	Radiation Units of measurement - Digital Meter Adapter
		The radiation level displayed on the LCD may be provided in conventional units mR/hr (one-second survey meter mode) and uR/hr (one-minute background radiation mode) or Systems International (SI) units of mSv/hr or uSv/hr.
		The difference between the rad and rem is that the rad is a measurement of the radiation absorbed by the material or tissue.
		The rem is a measurement of the biological effect of that absorbed radiation.
	www.imagesco.com /articles/dmad/digital-meter-adapter-pg2.html (398 words)

	21st-NXT/Azima
		The radiation resistance is now insignificant because the air close to the panel also moves in a random fashion, reducing the effective air load.
		At radiated wavelengths that are small relative to the diaphragm dimensions, interference takes place between the radiation from different regions of the diaphragm, and this increases in severity off-axis.
		This is due to the complexity of distributed-mode radiation and the uncorrelated phase of the individual radiating elements as seen from the far-field point of view.
	www.vxm.com /NXT.html (3689 words)

	Optical transmission network (Site not responding. Last check: 2007-10-26)
		While the single mode technology is necessary to transmit very wide bandwidth services such as high resolution digital video from the central office to the user stations, data transmissions from the user stations to the central office often need only lower bandwidth capability.
		The central office comprises a single mode continuous wave laser whose output is divided by a power divider over a plurality of single mode optical fibers connecting the central office with each of the user stations.
		Single mode technology is used to transmit information from the central office to the user station, while simple and cheap multimode technology is used to transmit information from the user stations to the central office.
	www.stickebana.com /scitech/nail_extension_composition/optical_transmission_network.html (2006 words)

	Radiating feeder: Applying a theory.
		Since in this mode an input voltage of the cable is a difference of an inner wire potential and a shield potential, this mode is usually referenced as a differential mode.
		This mode is usually referenced as a common mode, because the input signal is common for both input terminals.
		The radiating part of the feeder was made as a quarter wavelength vertical radiator, isolated by means of balun at its bottom end and fed from its low impedance top end.
	www.antennex.com /preview/May503/vadim.html (4638 words)

	TN221
		The radiated emissions for microprocessor-based systems that do not have a clock spectrum spreader enabled will generally be pure tones at harmonics of the clock speed, which makes it unnecessary to use a special filter or quasi-peak detection, except for final verification measurements.
		Radiation is generated by high-frequency current flows in PC boards and attached cables.
		Common-mode radiation is the radiation emitted by an antenna, such as a wire attached to a voltage source.
	www.rabbitsemiconductor.com /documentation/docs/refs/TN221/tn221.htm (4140 words)

	Telecom Dictionary R: Phone Service Definitions
		Radian (rad.) - A unit of plane angle measure equal to the angle subtended at the center of a circle by an arc equal in length to the radius of the circle.
		Note 2: The far-field radiation pattern describes the irradiance as a function of angle in the far-field region of the exit face of an optical fiber.
		Note 3: The radiation pattern may be a function of the length of the fiber, the manner in which it is excited, and the wavelength.
	faxswitch.com /Definitions/telecom_dictionary_r.html (7005 words)

	The Radiation Mode Theory
		The radiation mode theory, developed the last decade or so, is a major counterpart of finite element methods and finite difference methods.
		The advantage is that analytical predictions are possible and that therefore the theory does more than simply predicting phenomena by means of simulations.
		This is very important to simulate the propagation of ultrasound in composite materials of finite dimensions, with or without damage or artifacts.
	www.me.gatech.edu /declercq/Radiation-Mode-Theory.htm (79 words)

	Radiation proctopathy under the spotlight (Site not responding. Last check: 2007-10-26)
		Radiation proctopathy is an important consideration in patients being treated for prostate cancer, and merits further study to identify risk factors and management strategies, say the authors of a review article.
		Chronic radiation proctopathy is less common, affecting around 5% of patients, although the true incidence is unknown.
		They conclude that advanced radiation delivery techniques may help to decrease radiation dose to surrounding tissues; in the meantime, more information is needed regarding risk factors, diagnosis, and treatments.
	www.prostateline.com /prostatelinehcp/6096_25042_3_0_0.aspx (290 words)

	HF and Lower Frequency Radiation - Introduction
		A general rule (and there are exceptions) for EM radiation is that is affected by features that have sizes the same or larger size than the wavelength of the radiation.
		Therefore HF and lower frequency radiation is the best to use for direct long distance communications (when satellites or long cables cannot be used).
		There are natural sources of VLF radiation, but in general, like ELF, it is not strongly influenced by changes in environmental conditions therefore it is useful for reliable global communications.
	www.weather.nps.navy.mil /~psguest/EMEO_online/module3/module_3_1.html (1661 words)

	Death and Denial: The Failure of the THERAC-25, A Medical Linear Accelerator
		Since malignant tissues are more sensitive than normal tissues to radiation exposure, a treatment plan can be developed that permits the absorption of an amount of radiation that is fatal to tumor cells but causes relatively minor damage to normal tissue.
		In photon mode, a much greater electron-beam current is needed because a "beam flattener" is used to produce a consistent treatment area.
		Radiation overexposure was not considered as a cause until over a year later.
	www.csc.calpoly.edu /~jdalbey/SWE/Papers/THERAC25.html (4713 words)

	Micromechanical oscillator
		Assuming first that the optical pump wave frequency (w) is nearly resonant (but not exactly resonant) with the optical mode, radiation pressure, caused by circulating photons inside the cavity, will induce deformation of the toroidal structure and change the resonant frequency of the micro-cavity through dimensional changes in the modal round-trip optical path length.
		When the pump laser is detuned to the high-frequency tail of the optical mode, the phase relationship between optical pressure and microcavity deformation results in net power transfer from the optical pump to the mechanical mode.
		The eigen-frequencies of the mechanical modes of the toroidal structures were investigated numerically to confirm their mechanical origin.
	www.its.caltech.edu /~vahalagr/html/radiation-pressure-driven_micr.html (1531 words)

	Model SRQ-230 2-30 MHz Omnidirectional HF Antenna
		The two axial mode radiation patterns are used independently for transmit and receive on short range skywave circuits.
		The two conical mode radiation patterns are used independently for transmit and receive on the medium range circuits.
		The horizontally polarized conical mode is used for transmitting and the vertically polarized conical mode is used for receiving.
	www.antennaproducts.com /SRQ230detail.htm (369 words)

	[No title]
		The field distribution for radiation of this band is accessible for direct research, for example, by applying a microwave measuring line.
		But if the corpuscles - quanta in microwave radiation is no, then Einstein's hypothesis is not valid, at least, for this radiation mode, i.e.
		The photon is not real-existing corpuscle, but is entered as convenient mechanistic model to describe interaction processes of light with matter.
	www.pwaves.0catch.com /doc/english/e84.htm (597 words)

	Solar Radiation Sensors
		The CM 6B Pyranometer is suitable for the routine measurement of incoming global solar radiation (0.3 to 2.8 µm spectral range), diffuse sky irradiance measurements, and surface reflected solar radiation measurement research.
		Solar radiation is measured by two pyranometers, one for measuring incoming radiation from the sky, and the other, which faces downward, for measuring the reflected Solar radiation.
		Far Infrared radiation is measured by two pyrgeometers, one for measuring the Far Infrared radiation from the sky, the other from the soil surface.
	www.omniinstruments.co.uk /airweath/kippzonen/kippsolar.html (2413 words)

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