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...se ideal properties include: independence from field strengths, direction, frequency, or polarization, and from temperature.

..., and, when going more than a specified distance offshore, carrying [[ITU frequency bands|MF/SSB]] radio, [[INMARSAT]] satellite communications, and [[NAVTEX]]

...s changes in the intensity of a signal at one frequency when the resonance frequency of a different nucleus is irradiated, due to dipole-dipole interactions bet ...<math><S_z></math> is the magnetization of spin S after irradiation at the frequency of spin I,

In [[multispectral scanning]], the number of discrete frequency (or equivalent) bands recorded in an individual pixel. Remember that relati

...chniques to put a continuously varying instrument reading onto a [[radio]] frequency received by an earth station. Extremely complex analog tape recorders, wit ...pollo]], [[IEEE frequency bands|S-band]] was common, rather than the [[ITU frequency bands|VHF]] of the Second World War and through the fifties.

...ty in the [[head]]; [[scalp]]; or [[neck]]. The subtypes are classified by frequency and severity of symptoms. There is no clear cause even though it has been a

...eception of radio signals made through certain assigned bands in the radio frequency spectrum by private individuals for non-commercial and two-way purposes. Mi ...[Slow Scan Television]] is a popular way of transmitting images over lower frequency bands, in higher bands (ATV) [[Amateur Television]] is becoming a more soph

...nclude [[EU-NATO-US frequency bands|E/F and I/J military bands]] or [[IEEE frequency bands|IEEE S or X bands]], with power levels from 10 to 60 kilowatts.

{{r|Frequency agility}}

{{r|IEEE frequency bands}}

...ransfer function]] of a linear, time-invariant system plotted with a log-[[frequency]] axis. There are two plots: the Bode magnitude plot and the Bode phase plo

...number 69, and adjacent notes tuned according to equal temperament in the frequency ratio 2^1/12. Various codes allow selection of [[timbre]] and of

...ectromagnetic radiation can be described in terms of its [[Energy]] (E), [[frequency]] (f), [[wavenumber]] (v'), or [[wavelength]] (<math>\lambda</math>). These ...e]], there may be difficult tradeoffs between letting an enemy use a radio frequency for his own purposes while one's own side is gaining [[signals intelligence

|chapter=Chapter 7: Frequency response of integrated circuits

..., [[frequency agility|frequency-hopping]] [[ITU frequency bands|ultra-high frequency (UHF)]] waveform. Army Data Distribution System is also compatible with [[

...hysically smaller than the equivalent in the ITU frequency bands|very high frequency (VHF) spectrum. ...e manner, direction finding systems may not be able to follow the changing frequency long enough to get an accurate position.

...ty in the [[head]]; [[scalp]]; or [[neck]]. The subtypes are classified by frequency and severity of symptoms. There is no clear cause even though it has been a

...examined by comparing diseased and non-diseased persons with regard to the frequency or levels of the attribute in each group.<noinclude>{{DefMeSH}}</noinclude>

...onography''' is "[[ultrasonography]] applying the [[Doppler effect]], with frequency-shifted ultrasound reflections produced by moving targets (usually red bloo ...que is the ability to estimate the velocity of flow from the Doppler shift frequency."<ref>{{MeSH|Duplex Doppler ultrasonography}}</ref>

{{r|Fundamental frequency}}

{{r|Frequency agility}}

{{rpl|Frequency}}

...uency" is used as an example of a means of creating multiple channels, but frequency division certainly is not the only method. At a minimum, alternatives inclu ...ould still take some effort to find the channels that correlate well. When frequency agility is used, however, the true and false channels frequently change, ac

'''Radio Frequency Identification (RFID)''' systems have recently garnered interest in the fie RFID systems consist of a Radio Frequency (RF) tag reader, typically consisting of a transmitter/receiver module conn

{{r|Frequency band}} in [[signal theory]]

...secure the transmission channel more than the information on it, such as [[frequency agility]], [[spread spectrum]], or both.

...t''' is an [[interference]] between two [[sound]]s of slightly different [[frequency|frequencies]], perceived as periodic variations in volume whose rate is the ...hear two sounds, more or less harmonic. When the two strings have the same frequency, of course one sound will be heard; but ''just before'' there will be a str

{{r|Frequency}}

'''Sound''' is the range of [[frequency|frequencies]] that can be [[hearing|heard]] by a [[life|living]] [[organism ...of a pond as viewed from the side. A wave can be measured in terms of both frequency and [[amplitude]]. The amplitude, or maximum departure from the average or

...io of the [[U.S. Army]] in the [[Korean War]], differing only in operating frequency from the AN/PRC-10 and AN/PRC-8. All were backpack [[vacuum tube]] radios w

{{r|Frequency}}

...as a wavenumber of 20,000 cm^-1 or 20&nbsp;kK. Photon energy and frequency are proportional to wavenumber: 10&nbsp;kK corresponds to 1.24 eV. The wavevector(<math>k</math>), wavelength (<math>\lambda</math>), and frequency (<math>f</math>) are related:

{{r|Frequency-division multiplexing}}

The [[probe]] in an NMR spectrometer is responsible for coupling the radio frequency electromagnetic field generated by the [http://en.citizendium.org/wiki/NMR_ ...ystems for controlling the MR transceiver, magnetic field gradients, field frequency lock, spinner speed, temperature of the sample (VT), and an interface to a

===Planck's Law: Frequency=== Formulated in terms of frequency:

{{r|Very-High-Frequency Omnidirectional Range}}

...by, a typical member of a population...the terms [[probability]], relative frequency, and proportion are used synonymously."<ref name="isbn0471526290p1">{{cite

{{r|ITU frequency bands}}

{{r|Radio Frequency Identification}}

...ional explosives, which produces radiation in the radiofrequency and lower-frequency electrical bands. The pulse produced by this phenomenon may damage or destr ...door coupling''' goes through an antenna intended to receive power in the frequency range being generated

{{r|Frequency spectrum}}

...ms use [[ITU frequency bands|UHF radio]] via satellite relay. Their [[ITU frequency bands|MF]] [[radio]] must support [[digital selective calling]] (DSC), a "t ...eceiver. Supplemental systems using [[digital selective calling]] on [[ITU frequency bands|VHF radio]] supplement the satellite system for coastal waters. It is

...requency Bands|Very Low Frequency]] or [[ITU Frequency Bands|Extremely Low Frequency]] bands, which require extremely long antennas. Shore stations transmitting

..., between 20 to 2500 MHz<ref>2-6000 MHz in the solicitation document</ref> frequency range, it has an approximately 20 mile range and its first target is cellul ...r control. Ideally, it would be effective against signals, which might use frequency agility, in the 2 MHz to 6 GHz range up to 30 miles away.

...n is transferred over a committed resource, such as a physical wire, radio frequency, or time slot in a fixed time-sharing schedule for transmission. Those res ...wired or wireless media, each connection is on a separate electromagnetic frequency. FDM works with both analog and digital signals.

{{r|Frequency division multiple access}}

It operates in the [[ITU Frequency Bands|UHF frequency band]], and can have 16 channels preset. Using the JTRS Soldier Radio Wave

...''T'' is the global x-ray temperature determined from the spectral cut-off frequency

...Summation occurs when the [[time constant]] is sufficiently long and the [[frequency]] of rises in potential are high enough that a rise in potential begins bef

{{r|Frequency}}

{{r|Frequency agility}}

...n honor of [[Joseph Fourier]]. The operation of transforming back from the frequency domain to the time domain is called the [[inverse Fourier transform]]. ...e) measure]] zero). Here, <math>\scriptstyle \mathcal{F}[f]</math> is the frequency domain representation of the function <math>\scriptstyle f(t)</math>. The f

**AN/SSQ-53B, AN/SSQ53D, and AN/SSQ-53E directional frequency analysis and recording (DIFAR) sonobuoys. **AN/SSQ-57B and AN/SSQ-36M calibrated low-frequency analysis and recording (LOFAR) sonobuoys.

{{r|Frequency agility}}

...frequency. A more subtle example of electronic conflict involves an enemy frequency, if one intelligence unit is gathering information from intercepting it, bu

{{r|Frequency modulation}}

...frequency appears higher, and if the observer and the source separate, the frequency appears lower. ...or an observer at a fixed location is {{nowrap|''&lambda; / c'',}} and the frequency with which a crest appears at a fixed location is ''f_w'' :

*A metrology overview from NIST: {{cite journal |title=Optical frequency/wavelength references |author=L Hollberg, CW Oates, G Wilpers |journal=J Ph

If the ground is highly absorptive of the radar frequency in use, it may not be possible to get an adequate measurement. Radar altime

...mplifier design, where it can cause drastic reduction of amplifier gain as frequency increases, called '''gain roll-off'''. In these amplifiers, the coupling im ...entering the amplifier. The bigger this Miller capacitance, the lower the frequency at which the amplifier fails to work.

...type of encryption is trivial to [[cryptanalysis | cryptanalize]] using [[frequency analysis]].

{{r|Frequency analysis}}

...ach and recede from the observer to substantiate Doppler's theory that the frequency was higher while approaching and lower while moving away. This effect, disc

...re defined to operate in a variety of geographic regions with a variety of frequency bands.

.../math> and a [[two-level system|two-level atom]] with [[resonance|resonant frequency]] <math>\omega_0</math>. ...on because they oscillate much more quickly than terms with the difference frequency <math>\Delta:=\omega_L-\omega_0,</math> which is approximately zero.

...rt Pitch''' is a standardization of [[Pitch (music)|pitch]] that sets the frequency of a simple [[Tone (music)|tone]] at pitch ''A''4 (the ''A'' above middle ' ..._detail.htm?csnumber=3601 |title=ISO 16:1975; Acoustics -- Standard tuning frequency (Standard musical pitch) |publisher=ISO Standards |accessdate=2012-07-05}}

...ncept of which being that they determine the [[amplitude]] of individual [[frequency|frequencies]] of interest in the spectrum of a complex signal. That signal

{{r|Frequency}}

...amplifier to enhance its strength for internal processing. The higher the frequency, the more expensive and specialized the receiving antenna is likely to be. ...superheterodyne principle, to a lower, easier to process, '''intermediate frequency (IF)'''. Sometimes, "double" or "triple conversion" receivers translate the

In [[genetics]], the '''Hardy–Weinberg principle''' states that [[gene frequency]] remains constant across generations (no [[genetic drift]]) unless a force In an example of two alleles, 'A' and 'a', random frequency is based on the binomial expansion

...H}}</ref> In contrast, [[ultrasonic therapy]] is "the use of focused, high-frequency sound waves to produce local hyperthermia in certain diseased or injured pa ...that energy, and converting the image to clinically useful images. Higher frequency improves resolution, but reduces tissue penetration.<ref>{{Cite book | auth

{{r|Frequency modulation}}

In the steady state <math> \frac{d<S_z>}{dt} = 0 </math>; when the resonance frequency of spin I is irradiated , <math> <I_z> = 0</math>, therefore: ...ent in the intensity of the S signal can be obtained by irradiation at the frequency of the I spin, provided that <math> \frac{\gamma_I}{\gamma_S} > 1 </math>,

The '''AN-|AN/SPY-1''' IEEE Frequency Bands|S-band volume search radar is the core of the AEGIS battle management AN/SPY-1 is an IEEE Frequency Bands|S-band radar intended to track a large number of targests in a volume

...ivers and analysis system. In particular, it is optimized for intercepting frequency agile radar. ...nd frequency hopping receiver system (FHRS) capability for exploitation of frequency agile threat systems.

...bn=0-19-511690-9 |chapter=§5.10: The MOSFET internal capacitances and high-frequency model |pages=pp. 441 ''ff'' |year=1998 |edition=4rth ed |url=http://www.am

...ding events result in a significant and measurable change in the resonance frequency.

{{r|Frequency modulation||**}}

...c therapy''' is a form of [[diathermy]] in which "the use of focused, high-frequency sound waves to produce local hyperthermia in certain diseased or injured pa

...ing of temperature, a so-called ''soft mode''.<ref name=Dove/> Because the frequency drops with temperature, a ferroelectric solid experiencing this vibration b

...rcraft. At present, the aircraft does not have coverage of all appropriate frequency bands. ...ng low probability of intercept signals, with intercept protection such as frequency agility and co-channel interference. <ref name=GS-JASA>{{citation

...he UHF range. Leased commercial satellite service for GBS uses the [[IEEE Frequency Bands|K_u band]].

...=books&ie=UTF8&qid=1307379460&sr=1-2#reader_0970951159 |chapter=Chapter 7: Frequency response and Bode plots |pages=pp. 7-1 ''ff'' |title=Circuit Analysis II w

...m uses a [[rotating frame of reference]], in which the central irradiation frequency, say 800 MHz, is fixed on the X- or Y-axis, and the magnetic field, by conv .... <math>\omega</math>= 2<math>\pi\nu</math>. Remembering that the central frequency is fixed on the X-axis, the chemical shifts of each proton will cause them

{{r|Frequency modulation}}

==Calculating Allele Frequency==

Multiaccess media include wireless domains divided by [[radio]] frequency or other mechanism, as well as physical media such as coaxial cable, optica

...et in a device that makes them appear to be a shared medium. It may be the frequency assigned to a particular wireless channel.

{{r|Frequency agility}}

{{r|EU-NATO-US frequency bands}}

...[MILSTAR]], the third generation of which is the [[Advanced Extremely High Frequency]] system. Both these strategic and tactical systems are intended for two-wa Operating in the [[IEEE Frequency Bands|X- and Ka-bands]], these [[satellite orbits#geosynchronous orbit|geos

These satellites, operating in the [[UHF satellites|UHF frequency band]], provide service characterized as narrowband (i.e., low data rate),

...em, AUTODIN, as well as well-known radio communications such as the [[high-frequency]] [[single-sideband]] radio broadcast system of the [[Strategic Air Command

...probe®''' (Bruker, Inc.) or a '''Chiliprobe®''' (Varian, Inc.), is a radio frequency (typically 600-900 MHz) exitation and receiving probe in which the electron

...e rays will be scattered and the scattered [[radiation]] will have smaller frequency (and longer wavelength) than the incident radiation. The change in waveleng

...given direction, of a [light] source that emits monochromatic radiation of frequency 540 × 10¹² hertz and that has a radiant intensity in that direc

}} (Inverter circuits are used for [[variable-frequency drive|variable-frequency motor speed control]])

...pole higher in frequency (usually an output pole) moves to a still higher frequency: hence the name ''pole splitting''.<ref name=Toumazou/><ref name=Thompson/> ...lace the compensation capacitor with a Miller capacitor at the input and a frequency-dependent current source at the output.}}

...e updated data is then uplinked to the satellite via one of several [[IEEE frequency bands|S-band]] ground antennas. ...ars, faster processors with more memory, and a new civil signal on a third frequency (L5). The first GPS Block IIF satellite is scheduled to launch in 2010. Sta

| title = Radio Frequency Radiation (RFR) Hazards ...hese arcs can generate EM energy throughout the RF spectrum, including low-frequency components that are in the same band as the firing signal, and will even pa