1,769 reputation
715
bio website markbeadles.com
location Columbus, OH
age 47
visits member for 3 years, 3 months
seen Jan 28 '13 at 17:55

Jan
19
comment Does a perfect mirror behave the same as a blackbody radiator?
This paper addresses your question, I believe, but I do not have access to full text from here. "Radiation from perfect mirrors starting from rest and the black body spectrum"
Jan
19
comment How does placing objects in liquids affect the mass?
Also - scales always measure weight. They work by measuring the force that gravity applies to the object.
Jan
18
awarded  Excavator
Jan
18
revised If an atom is fully ionized by removing all electrons, is it still an atom?
fixed spelling of precedents
Jan
15
answered lifetime of a PN junction in a diode
Jan
15
comment Doppler's effect use
here is an example from Microsoft of the use of Doppler pitch shifting to simulate objects moving toward or away from the player.
Jan
15
comment Doppler's effect use
Yes, and Doppler sonography is also used for imaging of other organs to determine the various blood flows into and out of them, not just the heart: brain, liver, kidney, really pretty much anything. It's a fantastic technology that has saved or improved many lives by eliminating the need for exploratory surgery, and allowing necessary surgeries to be much more targeted.
Jan
15
awarded  Analytical
Jan
14
comment Can a big microwave used to dry clothes?
If by "cool" you mean "catches your Levi's on fire", then yeah. :)
Jan
14
answered Can a big microwave used to dry clothes?
Jan
13
comment How does lifting an object effect its entropy
Again, as the gas of photons streams down into the box that is lower in the gravity well, its temperature and $\therefore$ entropy will increase. The Baez page really has some good thoughts on an almost identical problem.
Jan
13
comment How does lifting an object effect its entropy
Also see this related question on gravity vs entropy and this thought experiment on John Baez' site. In particular, wouldnt' some of the photons escape the gravitational well in 2?
Jan
13
comment How does lifting an object effect its entropy
But wouldn't the temperature of the photon gas increase as it falls in the gravity field, thus increasing the entropy during step 3?
Jan
5
comment How to distinguish female and male voices via Fourier analysis?
Note that the human ear works by means of what is essentially a mechanically-performed spectral analysis via something like a continuous wavelet transform. Did a paper on this for neurolinguistics once :)
Jan
5
comment How to distinguish female and male voices via Fourier analysis?
Yes, they are used extensively in looking vocal dysfunction as well. a google search for "formants vocal dysfunction" is quite revealing!
Jan
5
comment How to distinguish female and male voices via Fourier analysis?
"Formant dispersion" is a term of art in the field of auditory acoustics/linguistics. Formants are a key concept there. Formants are the spectral peaks of the voice sound, see en.wikipedia.org/wiki/Formant. In linguistics they're used to characterize and distinguish vowel and other continuant sounds and to analyze consonants by their impact on adjacent formants.
Jan
5
awarded  Organizer
Jan
5
revised How to distinguish female and male voices via Fourier analysis?
added acoustics tag
Jan
5
suggested approved edit on How to distinguish female and male voices via Fourier analysis?
Jan
5
answered How to distinguish female and male voices via Fourier analysis?