Results 201 to 210 of about 2,445,100 (248)

Four channel foetal ECG data collection system

Medical Engineering & Physics, 1995
Recently there has been an increased interest in the development of improved techniques for the diagnosis of foetal distress during labour. Many of the techniques have been based on extracting extra information from the foetal ECG obtained from a scalp electrode.
J S, Curnow, L B, Barron, J, Westgate, K G, Greene   +3 more
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A Four Channel Photoelectric Photometer

International Astronomical Union Colloquium, 1971
Abstract A simultaneous four channel photoelectric photometer has been used successfully by astronomers at the Dominion Astrophysical Observatory in the past three years to measure the colours of some 2000 stars. The optics consist of a small grating spectrograph with quartz lenses.
G. A. H. Walker, G. Hill, S. C. Morris
openaire   +1 more source

Four-channel self-focus computer-generated hologram

Applied Optics, 1997
A new type of computer-generated hologram (CGH) is described in this research. Upon the base of a two-channel CGH, it can generate four independent images in four different directions with the addition of positive or negative quadratic phase factors on the object spectrum; it has the character of self-focus. Results of the experiment are provided.
R, Chaohong, Z, Jin, G, Wenqi
openaire   +2 more sources

Four memory channels in the rat brain

Psychopharmacology, 1978
Rats were trained in a shuttle-box to emit shuttle response (SBs) to a 5-s buzzer using three different routines: (1) classical conditioning (DP test), in which the buzzer was followed immediately by 1.5 mA foot-shocks on all trials regardless of responses; (2) an avoidance paradigm without stimulus pairing (DC test), in which the buzzer-shock interval
I, Izquierdo, E, Elisabetsky
openaire   +2 more sources

Four-channel integrated-optics coupler and frequency-channel multiplexer

Soviet Journal of Quantum Electronics, 1980
A simple method was developed for the fabrication of strip waveguides in glass with losses below 1 dB/cm. A technique for the determination of the parameters of these waveguides was also developed. An integrated-optics structure was constructed from strip waveguides, which could be used in multimodefiber communication lines.
N M Lyndin, Yu N Sarkisov, V A Sychugov, Yu F Fedorov, G P Shipulo, I S Bezperstova, T V Pal'chun   +6 more
openaire   +1 more source

"Is four channel a quadrifizzle?"

ICASSP '76. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005
The development of 4 channel home entertainment systems has been motivated by the marketplace and accomplished without a thorough engineering feasibility study. One area of promise has not been exploited while four areas of foolishness have been propagated. As a result, the author's answer to the title question is "yes."
openaire   +1 more source

Four-channel strip power dividers

Proceedings of International Conference on Antenna Theory and Techniques, 2003
The finite-difference time-domain method has been applied successfully for electrodynamic analysis of the four-channel strip power divider taking into account finite losses in the dielectric substrate and the presence of a metal box. A test sample of the power divider was designed and manufactured.
Martynyuk, Sergiy Ye., Stepanenko, Petro Ya., Tereshchenko, V. M.   +2 more
openaire   +1 more source

Channel Four — Challenges of Commercialism

1989
The BBC still dominates discussion of British broadcasting. That this should be so, sixty years after its formation, and in the teeth of change, both technological and cultural, is a reminder of how powerfully the BBC has embedded itself in our lives. But it would be completely false to regard the past sixty years as the unfolding of a planned growth.
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Four varieties of voltage-gated proton channels

Frontiers in Bioscience, 1998
n human beings, infection with the tubercle bacillus usually results in inapparent disease, recognized only by a positive tuberculin reaction. However, about 10% of tuberculin-positive people develop clinically active tuberculosis (TB). The Lurie tubercle count method is probably the most accurate way to measure a vaccine's ability to prevent such ...
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Four-Channel Polarization Spectrometer

2023
Jian Bo, Xueping Ju, Changxiang Yan
openaire   +1 more source