Results 241 to 250 of about 1,948,990 (300)

Real-time QT interval measurement

Proceedings of the 22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (Cat. No.00CH37143), 2002
A real-time QT interval measurement algorithm was developed and preliminary tested. Three ECG leads (I, II and V5) were digitized simultaneously at a rate of 500 samples by second during five minutes; twenty patients were studied. The resulting signal was filtered in order to reject noise and avoid baseline wander.
R. Gonzalez, R. Fernandez, M. del Carmen Raola   +2 more
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Time synchronization method based on time interval measurement

2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC), 2021
In order to solve the demand of time synchronization with GPS satellite clock, a combination of high-precision time interval measurement technology and crystal taming technology is used to realize the taming control of local clock source by using standard 1PPS signal to complete the time synchronization with GPS satellite clock.
Chen Xiaomao, Liu Chunfei, Fan Yiwei, Guo Ning   +3 more
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The Measurement of Ultra-Short Time Intervals

Review of Scientific Instruments, 1947
An instrument is described which utilizes the superposition locus of transient pulses traveling in opposite directions on a transmission line for a determination of the interval between the times of generation of the pulses. For testing purposes pulses are generated by discharging a short segment of line through a matching network into a closed loop so
S. H. Neddermeyer, E. J. Althaus, W. Allison, E. R. Schatz   +3 more
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Measurement of Time Indifference Intervals

Perceptual and Motor Skills, 1972
Using S's previous response as his next stimulus in a time-interval reproduction task, response series were obtained from 22 individuals which tended toward limits independent of the initial intervals. The magnitudes of the intervals at these limits may, therefore, be properly called indifference intervals.
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Absorbance determination by time interval measurements

Analytical Chemistry, 1980
Absorbance measurements are accomplished by placing the sample inside the cavity of a laser which is impulsively pumped. If the laser contains an appropriate gain medium, there will exist a measurable time delay between pumping and the onset of lasing. It is shown that this time delay is related to the optical losses in the laser cavity. Increased time
J. Michael. Ramsey, William B. Whitten
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Noise induced time interval measurement biases

Proceedings of the 1992 IEEE Frequency Control Symposium, 2003
Time jitter in the output fronts of hysteretic triggers is not the only effect of additive noise. An average leading time bias error can be observed when large bandwidth noise is added to a poor slope signal. Time jitter is shown to be a possible limitation to the accuracy of high precision time interval measurements, as the average switching time is ...
E. Rubiola, A. Del Casale, A. De Marchi
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Short time interval measurement using a time amplifer

2008 Canadian Conference on Electrical and Computer Engineering, 2008
A new architecture for on-chip measurement of short time intervals is proposed. In the proposed method, narrow time intervals are first amplified by a time amplifier (TAMP) and then measured by a time to digital converter. A delay locked loop (DLL) circuit is utilized to design a feedback time amplifier in which the gain is programmed by input data to ...
Rashid Rashidzadeh, Majid Ahmadi, William C. Miller   +2 more
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Systolic Time Intervals and New Measurement Methods

Cardiovascular Engineering and Technology, 2016
Systolic time intervals have been used to detect and quantify the directional changes of left ventricular function. New methods of recording these cardiac timings, which are less cumbersome, have been recently developed and this has created a renewed interest and novel applications for these cardiac timings.
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Short Interval Time Measurement by a Parasitoid Wasp

Science, 1987
The number of eggs laid by the parasitoid wasp Trichogramma varies with host volume. The duration of the wasp's initial transit across the host surface during host examination is used to determine the number of eggs laid.
J M, Schmidt, J J, Smith
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The measurement of systolic time intervals by echocardiography

Journal of Clinical Ultrasound, 1974
AbstractA study was performed in which the systolic time intervals of 46 patients were measured directly from echocardiograms of their aortic valve motion. These intervals were compared with those obtained from the same patients by the conventional technique of simultaneously recording the carotid pulse, phonocardiogram and electrocardiogram.
L A, Vredevoe, S P, Creekmore, N B, Schiller   +2 more
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