Now showing items 1-10 of 23759
Effect of nonidentical signal phases on signal amplification of two coupled excitable neurons
In this paper, we study the response of two coupled excitable neurons to external subthreshold periodic signals. We find that the neurons' response to the subthreshold signals can be enhanced when the signal phases are ...
Noise reduction in speech signals using a TMS320C31 digital signal processor
This paper describes a speech enhancement system (SES) based on a TMS320C31 digital signal processor (DSP) for real-time application. The SES algorithm is based on a modified spectral subtraction method and a new speech ...
Signals in Communication Engineering History
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2010)
This paper is a study of various electric signals, which have been employed throughout the history of communication engineering in its two main landmarks: the telegraph and the telephone. The signals are presented in their ...
A tutorial on signal energy and its applications
This tutorial, dedicated both to young professionals and students working with digital signal processing and pattern recognition, introduces three feature extraction approaches based on signal energy, characterising ...
Local and global Ca2+ signals: physiology and pathophysiology
(Sociedad de Biología de Chile, 2004)
Retroactive Signaling in Short Signaling Pathways
(Public Library of Science, 2012-07)
In biochemical signaling pathways without explicit feedback connections, the core signal transduction is usually described as a one-way communication, going from upstream to downstream in a feedforward chain or network of ...
Localized nuclear and perinuclear Ca2+ signals in intact mouse skeletal muscle fibers
(Frontiers Media, 2015)
Nuclear Ca2+ is important for the regulation of several nuclear processes such as gene expression. Localized Ca2+ signals (LCSs) in skeletal muscle fibers of mice have been mainly studied as Ca2+ release events from the ...
Autoregressive decomposition and pole tracking applied to vocal fold nodule signals
This letter describes a novel algorithm that is based on autoregressive decomposition and pole tracking used to recognize two patterns of speech data: normal voice and disphonic voice caused by nodules. The presented method ...
Wnt-regulated dynamics of positional information in zebrafish somitogenesis
(Company Of Biologists, 2014-03)
How signaling gradients supply positional information in a field of moving cells is an unsolved question in patterning and morphogenesis. Here, we ask how a Wnt signaling gradient regulates the dynamics of a wavefront of ...
Mate searching in Ennya maculicornis (Membracidae: Polyglyptini) initiated by females: behavioural and acoustic descriptions
(Blackwell Publishing Ltd, 2019)
1. In treehoppers in which courtship has been studied, males initiate the search for females by periodically emitting a vibrational signal. The responses by the female are used by males as a beacon and give rise to a duet. ...