Radio-frequency (rf) scanning tunneling microscopy has recently been advanced to methods such as single-atom spin resonance. Such benefit from a frequency-independent rf voltage amplitude across the tunnel junction, which is challenging achieve due strong frequency dependence of attenuation in transmission line. Two calibration for have reported date. In this Note, we present an alternative met...

B. Ganapathisubramani, N. Hutchins, J. P. Monty, D. Chung and I. Marusic Journal of Fluid Mechanics / Volume 712 / December 2012, pp 61 ­ 91 DOI: 10.1017/jfm.2012.398, Published online: 27 September 2012 Link to this article: http://journals.cambridge.org/abstract_S0022112012003989 How to cite this article: B. Ganapathisubramani, N. Hutchins, J. P. Monty, D. Chung and I. Marusic (2012). Amplitu...

Aim: To generate and demodulate an amplitude shift keyed (ASK) signal and a binary FSK signal. Amplitude shift keying-ASK-in the context of digital communications is a modulation process, which imparts to a sinusoid two or more discrete amplitude levels. These are related to the number of levels adopted by the digital message. For a binary message sequence there are two levels, one of which is ...

In analyzing a signal, especially a non-stationary signal, it is often necessary the desired signal to be segmented into small epochs. Segmentation can be performed by splitting the signal at time instances where signal amplitude or frequency change. In this paper, the signal is initially decomposed into signals with different frequency bands using wavelet transform. Then, fractal dimension of ...

Radio Frequency Identification (RFID) is a hot topic in retail supply chain management [Behrenbeck, Küpper et al. 2004]. Yet, a recent study predicts “that the true benefits of RFID for retailers will be in enhanced marketing opportunities” [Sharpless 2005]. Research on RFID for marketing purposes is still rare giving the opportunity for more specific research on how RFID will influence busines...

one of the most fundamental reservoir characteristics is the thickness. the analysis of thin bed tuning on seismic reflectivity has been studied extensively by wides (1973) and neidel and pogiaggliomi (1977), who discussed the limits of seismic resolution. during the past decade, the industry has developed a plethora of new attributes in studying thin beds by employing spectral decomposition (p...

Amplitude modulation (AM) and frequency modulation (FM) are commonly used in communication, but their relative contributions to speech recognition have not been fully explored. To bridge this gap, we derived slowly varying AM and FM from speech sounds and conducted listening tests using stimuli with different modulations in normal-hearing and cochlear-implant subjects. We found that although AM...

This letter studies frequency-locked rotations in a phaselocked loop (PLL) circuit as FM demodulator. A rotation represents a desynchronized steady state in the PLL circuit and is regarded as another type of self-excited oscillations with natural rotation frequencies. The rotation frequency can be locked at driving frequencies of modulation signals. This letter shows response curves for harmoni...

BACKGROUND Recent studies of anesthetic-induced unconsciousness in humans have focused predominantly on the intravenous drug propofol and have identified anterior dominance of alpha rhythms and frontal phase-amplitude coupling patterns as neurophysiological markers. However, it is unclear whether the correlates of propofol-induced unconsciousness are generalizable to inhaled anesthetics, which ...