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Topic: Doppler

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	Doppler : Redefining podcasting
		The Doppler project is now publicly available on CodePlex.
		If you got the impression that nothing is happening with Doppler anymore… well, that’s not true.
		Besides that, parallel on the Windows version of Doppler I’m also continueing on the mobile versions.
	www.dopplerradio.net (1122 words)

	Doppler effect - Wikipedia, the free encyclopedia
		The Doppler effect, named after Christian Andreas Doppler, is the apparent change in frequency or wavelength of a wave that is perceived by an observer moving relative to the source of the waves.
		The Doppler effect is recognizable in the fact that the absorption lines are not always at the frequencies that are obtained from the spectrum of a stationary light source.
		This line shape is called a Doppler profile and the width of the line is proportional to the square root of the temperature of the gas, allowing the Doppler-broadened line to be used to measure the temperature of the emitting gas.
	en.wikipedia.org /wiki/Doppler_effect (1313 words)

	Christian Doppler - Wikipedia, the free encyclopedia
		Johann Christian Andreas Doppler ( November 29, 1803 in Salzburg â“ March 17, 1853 in Venice) was an Austrian mathematician and physicist, most famous for the hypothesis of what is now known as the Doppler effect which causes the frequency of a wave to apparently change as its source moves toward or away from you.
		Christian Doppler was born as the son of a stonemason, however could not work in his father's business because of his generally weak physical condition.
		Only one year later at age of 39 he published his most notable work on the Doppler effect (for instance to be noticed in the change of sound of a quickly passing vehicle).
	en.wikipedia.org /wiki/Christian_Doppler (279 words)

	Encyclopedia: Doppler effect (Site not responding. Last check: 2007-10-31)
		Christian sex Doppler (November 29, 1803 _ March 17, 1853) was an American mathematician, most famous for the hypothesis of what is now known as the sex effect which causes the frequency of a wave to apparently change as its source moves toward sex or away from sex.
		In physics, the relativistic Doppler effect is change in the observed frequency of light due to the relative motion of source and observer when taking into account the Special Theory of Relativity.
		The Doppler profile is a spectral line profile which results from the thermal motion of the emitting atom or molecule.
	www.nationmaster.com /encyclopedia/Doppler-effect (2286 words)

	doppler applications
		The Doppler signal is processed by a Fourier spectrum analyser, which performs a Fourier transform on the Doppler signal at intervals of approximately 10 ms.
		The incorporation of pulsed Doppler and B-mode imaging into one instrument allows the position of the Doppler sample volume to be known and enables the measurement of the Doppler angle as is shown in Figure 1.
		Doppler waveform analysis is often used as a diagnostic tool in the clinical assessment of disease.
	www.ob-ultrasound.net /doppler_a.html (1748 words)

	Doppler
		Doppler did not have to take part in the competition but was hurt by the fact that it was held at all.
		Although Doppler was correct in saying that his principle would change the colours of double stars, depending on which star was approaching or receding from the Earth, the effect is too small to be significant.
		Doppler's wife, who had given him staunch support throughout their marriage, had remained in Vienna with their three sons and two daughters awaiting his return but, on realising that his end was near, she made the journey to Venice and was with Doppler when he died.
	www.calstatela.edu /faculty/kaniol/a360/doppler.htm (2301 words)

	Doppler effect Info - Encyclopedia WikiWhat.com (Site not responding. Last check: 2007-10-31)
		The Doppler effect is the apparent change in frequency or wavelength of a wave that is perceived by an observer moving relative to the source of the waves.
		The total Doppler effect may therefore result from both motion of the source and motion of the observer.
		It has been used to measure the speed at which stars and galaxies are approaching or receding from us, to detect that an apparently single star is, in fact, a close binary and even to measure the speed of rotation of stars and galaxies.
	www.wikiwhat.com /encyclopedia/d/do/doppler_effect.html (932 words)

	Doppler effect on Encyclopedia.com (Site not responding. Last check: 2007-10-31)
		The Doppler effect in reflected radio waves is employed in radar to sense the velocity of the object under surveillance.
		In astronomy, the Doppler effect for light is used to measure the velocity and rotation of stars and galaxies along the direction of sight.
		The Doppler effect is responsible for the red shifts of distant galaxies, and also of quasars, and thus provides the best evidence for the expansion of the universe, as described by Hubble's law.
	www.encyclopedia.com /html/D/Dopplere.asp (661 words)

	Doppler ultrasound: principles and practice
		Doppler ultrasound measures the movement of the scatterers through the beam as a phase change in the received signal.
		This is of the utmost importance in the use of Doppler ultrasound.
		Doppler signals are obtained from all vessels in the path of the ultrasound beam (until the ultrasound beam becomes sufficiently attenuated due to depth).
	www.centrus.com.br /DiplomaFMF/SeriesFMF/doppler/capitulos-html/chapter_01.htm (3737 words)

	RLTN3813 Unit 7
		The Doppler shift or frequency shift is the difference between the sound source frequency and the perceived frequency at the sound receiver.
		Doppler sound beam is created by a single element or single-group of crystals which send and receive the beam.
		Doppler sound beam is created by one element or set of crystals and received by another element or set of crystals.
	moon.ouhsc.edu /kboyce/rltn3813/3813u7.htm (1808 words)

	DOPPLER DF INSTRUMENTS/PULSES
		Doppler shift is a change, or "shift", of ( recieved) signal frequency caused by relative motion between a signal source and a signal detector.
		The amount of Doppler shift ( expressed in Hertz) is proportional to the "rest" carrier frequency, and the relative velocity between the source and detector.
		In this ( two antenna) example, the Doppler pulses consist of alternating positive and negative pulse polarities : Positive pulses are produced by the antenna "nearest to" the signal source, and negative pulses are produced by the antenna "farthest from" the signal source.
	www.silcom.com /~pelican2/PULSES.html (1069 words)

	Doppler Effect (Site not responding. Last check: 2007-10-31)
		By analogy, the electromagnetic radiation emitted by a moving object also exhibits the Doppler effect.
		In astronomy, the Doppler effect was originally studied in the visible part of the electromagnetic spectrum.
		Today, the Doppler shift, as it is also known, applies to electromagnetic waves in all portions of the spectrum.
	archive.ncsa.uiuc.edu /Cyberia/Bima/doppler.html (442 words)

	Doppler Shift for Sound and Light
		To clarify the relation between the classical and relativistic Doppler shift equations, recall that for a classical treatment of a wave with characteristic speed c
		in a material medium the Doppler frequency shift depends on whether the source or the receiver is moving relative to the fixed medium. If the receiver is stationary and the source is receding at a speed of v (normalized so c
		This differs in appearance from of the Doppler shift equation given in Einstein’s 1905 paper, but only because in Einstein’s equation the angle f is as evaluated with respect to the transmitter’s frame of reference, whereas in our equation the angle is evaluated with respect to the receiver’s frame of reference.
	www.mathpages.com /rr/s2-04/2-04.htm (660 words)

	Doppler Shift
		The spectrum from M31 reflects the fact that M31 is moving with respect to the Earth, and the light it emits is therefore Doppler shifted.
		This is an example of what is called the Doppler shift, and it is an effect that is associated with any wave phenomena (such as sound waves).
		The non-relativistic Doppler shifted frequency of an object moving with speed v with respect to a stationary observer, is:
	imagine.gsfc.nasa.gov /YBA/M31-velocity/Doppler-shift-2.html (1057 words)

	greg hughes - dot - net - Doppler - Better podcasting syndication for Windows (Site not responding. Last check: 2007-10-31)
		Enter Doppler [ http://www.dopplerradio.net/ ], a client program that runs on Windows and raises the bar in terms of making it easier for the end user to subscribe to podcasts without too much hassle.
		Doppler is an aggregator that downloads podcasts based on RSS feeds, and lets you listen to it the way you want it, whenever you like it, on the device of your choice.
		Doppler has been developed using the latest Microsoft.NET technology and is available as a small download sizing less than 500 KB.
	www.greghughes.net /rant/PermaLink,guid,96d1ddd9-b9cc-4d7c-bd83-ada688379c5f.aspx (605 words)

	The Doppler Effect
		Dutch physicist Christian Doppler first studied it in relation to sound waves, and that is where most of us have encountered it.
		The Doppler Effect is an "illuision," caused by the fact that we are moving relative to the source of sound.
		By listening carefully to the sounds made by a band as it played on moving platform, he determined that the size of the "Doppler shift" depends on how fast the two objects are coming together or moving apart.
	www.austin.cc.tx.us /jheath/Stellar/Hand/Deff/deff.htm (1307 words)

	USATODAY.com (Site not responding. Last check: 2007-10-31)
		Doppler refers to the principle the Austrian scientist Christian Doppler discovered in 1842.
		Doppler worked out his ideas using sound waves, long before radio, much less radar, was invented.
		The computer that's a part of a Doppler radar uses the frequency changes to show directions and speeds of the winds blowing around the rain drops, insects and other objects that reflected the radio waves.
	www.usatoday.com /weather/wdoppler.htm (333 words)

	Doppler, Christian -- Encyclopædia Britannica (Site not responding. Last check: 2007-10-31)
		Austrian physicist who first described how the observed frequency of light and sound waves is affected by the relative motion of the source and the detector.
		This phenomenon became known as the Doppler effect.
		Brief note on the phenomenon of Doppler effect and its application in weather forecasting using Doppler radar.
	www.britannica.com /eb/article?eu=31465 (663 words)

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