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Apr
10
comment What signal processors comprise an Event-Related Potential system for EEG?
Yes I see that now. I was focused on EEG and I see that FFT doesn't have much bearing in the ERP context--thanks.
Apr
10
comment What signal processors comprise an Event-Related Potential system for EEG?
QEEG [FFT/wavelet analysis] has been accepted for clinical application in some areas, such as cerebro-vascular disorders and epilepsy, though it remains yet to be accepted in other clinical areas, such as diagnosing mild traumatic brain injury or psychiatric disorders. en.wikipedia.org/wiki/Quantitative_electroencephalography.
Apr
10
comment What signal processors comprise an Event-Related Potential system for EEG?
And: en.wikipedia.org/wiki/Quantitative_electroencephalography
Apr
10
comment What signal processors comprise an Event-Related Potential system for EEG?
...Fast Fourier transform (FFT) of EEG data, is ...a reformatting of data into component frequencies. This transformation is useful because many pathological EEG patterns produce spectral patterns that can be easily recognized without the extensive training required to interpret routine EEG tracings... From the abstract of this paper. Clearly FFT does make sense and is done in some cases.
Apr
9
comment What signal processors comprise an Event-Related Potential system for EEG?
This seems like a reasonable answer to me. Does filtering play a role in this?
Apr
9
comment What signal processors comprise an Event-Related Potential system for EEG?
In particular the goal is often to get an idea of the distinct frequencies that comprise a complex signal, and if the signal is really complex it may be impossible get that information by observing the time signal.
Apr
9
comment Resources for a practical guide to bacterial identification per human specimen
Just speculating about the downvote (which is not mine).
Apr
9
comment Resources for a practical guide to bacterial identification per human specimen
Maybe the reader was surprised you are instructing this topic but aren't aware of current texts in the subject?
Apr
7
comment Approaches towards a theory of innovation in evolution
I upvoted because even if I question the premise of the book that doesn't mean the OP has asked a poor question. A negative score seems punitive if unaccompanied by an explanation.
Apr
7
comment Approaches towards a theory of innovation in evolution
Does he present in his book an argument that random mutation is insufficient? The phrase "uncannily perfect" is horribly subjective and the word "mere" to describe 3.8 billion years is jarring and counterintuitive.
Apr
4
comment I need help identifying a completely unknown plant for my biology class
Appears to be a succulent of some sort?
Mar
18
comment Why are local field potentials generally band-pass filtered?
This is a nice answer. I remember an EE prof. who said a lab procedure they used to give grad students required them to recognize that noise from florescent lights would ruin their results unless filtered.
Mar
18
comment What kind of organism grows in two-day-old lemon water?
Aspergillus is used commercially to produce citric acid and readily colonizes citrus. If you place a colony on an orange or on rice and notice black spores (on the orange) or pale strands (on the rice) it is probably Aspergillus. As WYSIWYG notes, impossible to say for sure without more data.
Mar
17
comment Headshot = instant kill?
IMO this question is less about biology than ballistics. The effect of destroying a particular structure in the brain is probably known, including the likelihood of instant death (whatever that means). The likelihood that a bullet causes such damage is a separate question.
Dec
6
comment How are at home fermentations without starter cultures controlled?
That seems to generally be true, yes. It's a broad question but I think people acquire a lot of experience and can tell by smelling, tasting, looking. It's probably not infallible.
Dec
4
comment Can you measure plasma glucose with a regular glucose meter?
I assume you mean that using the measurements is dangerous. There is nothing dangerous about doing the measurement, right?
Dec
9
comment Model for fluctuating selection
@GriffinEvo: electrical engineering.
Oct
9
comment How long can a bee surive in a jar?
@WYSIWYG: no problem and I do prefer the unicode version for microliter I'll change that back to your version when I get a chance. For CO2 I think it's easier in Latex but maybe I'm just used to it.
Oct
9
comment How long can a bee surive in a jar?
@WYSIWYG: "bodyweight" is not in Webster's. To edit an answer as opposed to a question is a little much, especially if the OP accepted it without comment. I usually offer proposed corrections in comments. Form for footnotes changes every few years as journals revise their style guidelines. I find this style easy to read.
Aug
11
comment If evolution is a gradual and continuous process, how can we say humans came about 200k years ago? What is so special about that point in time?
The question is a dupe if memory serves but in any case your answer doesn't address what is probably a valid point. There probably was no clear distinction and the classification is an arbitrary convenience. That we do not resemble Neanderthals seems not to have any bearing on the question. Why a period in 200000?