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Spectrum Analysis

Known as: Analysis, Spectrum, Spectroscopy 
The study of the amount of light that is taken up, given off, or scattered (reflected) by an object. Spectroscopy breaks down light and measures… 
National Institutes of Health

Related topics

Related topics

47 relations

Narrower (39)

Circular DichroismColorimetryElectron Probe MicroanalysisElectron Spin Resonance Spectroscopy
OXALYDIHYDRAZIDE (SPECTROSCOPIC), COPPEROptical Rotatory DispersionSpectroscopy (discipline)nonocular refractometry

Broader (1)

analytical method

Papers overview

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Highly Cited
2000
Highly Cited
2000
Effects of controlled breathing, mental activity and mental stress with or without verbalization on heart rate variability.
Highly Cited
1996
Highly Cited
1996
Simple distributed fiber sensor based on Brillouin gain spectrum analysis.
A novel configuration of a distributed fiber sensor by Brillouin gain analysis has been developed for temperature and strain… 
Highly Cited
1995
Highly Cited
1995
The effects of emotions on short-term power spectrum analysis of heart rate variability .
Highly Cited
1994
Highly Cited
1994
Power spectrum analysis of heart rate variability to assess the changes in sympathovagal balance during graded orthostatic tilt.
BACKGROUND The powers of the low-frequency (LF) and high-frequency (HF) oscillations characterizing heart rate variability (HRV… 
Highly Cited
1994
Highly Cited
1994
Power spectrum analysis of heart rate variability: a tool to explore neural regulatory mechanisms.
Even at rest the RR interval changes continuously around its mean value. Neural mechanisms account for part of this variability… 
Highly Cited
1994
Highly Cited
1994
An oscillation in the global climate system of period 65–70 years
IN addition to the well-known warming of ∼0.5 °C since the middle of the nineteenth century, global-mean surface temperature… 
Highly Cited
1991
Highly Cited
1991
Accuracy of assessment of cardiac vagal tone by heart rate variability in normal subjects.
Highly Cited
1983
Highly Cited
1983
Theoretical framework for spectrum analysis in ultrasonic tissue characterization.
An analytic model is described for application in ultrasonic tissue characterization. The model is applicable to clinical… 
Highly Cited
1971
Highly Cited
1971
The Origin and Structure of Easterly Waves in the Lower Troposphere of North Africa
Abstract This study investigates the origin and structure of easterly waves that form in the lower troposphere of North Africa… 
Highly Cited
1955
Highly Cited
1955
Doppler Spectrum of Sea Echo at 13.56 Mc./s.
THE Doppler frequency shift of radio waves reflected from the sea surface at 13.56 Mc./s. has been recorded and a portion of a… 
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