|
|
|
Volume-2 (2003);
Issue 1 (January-March) Published on May 24, 2003
|
|
|
|
|
|
2003;1-1 -
Original Article |
| Sinha RK, Agrawal NK, Ray AK.
A power spectrum based backpropagation artificial neural network model for classification
of sleep-wake stages in rats |
Abstract:
Three layered feedforward backpropagation
ANN (Artificial neural network) architecture is designed to classify sleep-wake stages in
rats. Continuous three channel polygraphic signals such as EEG (electroencephalogram), EOG
(electrooculogram) and EMG (electromyogram) were recorded from conscious rats for eight
hours during day time. Signals were also stored in computer hard disk with the help of
analog to digital converter and its compatible data acquisition software. The power
spectra (in dB scale) of the digitized signals in three sleep-wake stages were calculated.
Selected power spectrum data of all three simultaneously recorded polygraphic signals were
used for training the network and to classify SWS (slow wave sleep), REM (rapid eye
movement) sleep and AWA (awake) stages. The ANN architecture used in present study shows a
very good agreement with manual sleep stage scoring with an average of 94.83% for all the
1200 samples tested from SWS, REM and AWA stages. The high performance observed with the
system based on ANN highlights the need of this computational tool into the field of sleep
research.
Key words: ANN, Power spectrum,
Sleep-wake states
|
|
|
This Article |
|
 |
 |
|
|
|
|
|
|
|
|
2003;1-2
-
Opinion |
|
Vinod Scaria. Peer review of scholarly
communication in health: Perspectives in the Internet age |
Abstract:
Peer review is an established form of
trust-marking and ensuring quality of scholarly communications. The advent of Internet has
had its impact on peer review also. This paper examines the existing approaches of peer
review utilizing the Internet. Future approaches, challenges and proposal of a framework
for open peer review of directly published scholarly communication on the Internet is also
discussed.
Key words: Peer-review,
Internet, approaches, utilities |
|
|
This Article |
|
|
|
|
|
|
|
|
