Showing papers on "Artifact (error) published in 1973"
TL;DR: A circuit is described which subtracts a fraction of both the vertical and horizontal EOG signals from the EEG signal to be corrected, and it appears that the eye movement artifact is almost completely removed.
98 citations
Patent•
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TL;DR: In this article, the first derivative of an applied electrocardiographic (ECG) signal, recognized the R-wave event therefrom, and discriminates against signal components which lie outside predetermined signal parameters in producing a rectangular pulse output.
Abstract: An electronic system is disclosed which examines the first derivative of an applied electrocardiographic (ECG) signal, recognizes the R-wave event therefrom, and discriminates against signal components which lie outside predetermined signal parameters in producing a rectangular pulse output. In addition, muscle artifact and pacers are discriminated against. The system includes an automatic gain control to eliminate the need for operator controls.
49 citations
Journal Article•
40 citations
TL;DR: Under the conditions used in the laboratory, leucine is incorporated into proteins of intact mitochondria at a rate nearly 20-fold greater than that reported by Hochberg et al.
34 citations
Patent•
19 Jul 1973TL;DR: In this article, an automatic indirect blood pressure measurement with transducer means for deriving and developing electrical signals in response to the interaction of blood pressure and cuff pressure under a varying external pressure capable of occluding an artery.
Abstract: Apparatus for automatically implementing indirect blood pressure measurement with transducer means for deriving and developing electrical signals in response to the interaction of blood pressure and cuff pressure under a varying external pressure capable of occluding an artery, and detector means for analyzing the electrical signals in terms of pulse width and rate for detection and rejection of artifact signals.
28 citations
28 citations
TL;DR: To ensure accurate recording of vasomotor activity in the peripheral vascular system with the photoplethysmographic technique, a system calibration procedure is presented and several significant sources of photocell and light source artifact are revealed.
Abstract: To ensure accurate recording of vasomotor activity in the peripheral vascular system with the photoplethysmographic technique, a system calibration procedure is presented. Utilization of a calibration procedure reveals several significant sources of photocell and light source artifact. A calibration apparatus and procedure as well as data demonstrating the light history artifact and its resolution are presented.
25 citations
Patent•
19 Mar 1973TL;DR: In this paper, the pacemaker artifact signals and EKG signals are received and recombined for use in telephone transmission, and a pacemaker rate monitor is used for monitoring.
Abstract: Apparatus for receiving pacemaker artifact signals and EKG signals having means for separating the artifact from the EKG, standardizing the artifact, and recombining the signals for use, for example, in telephone transmission. The apparatus also includes means for monitoring the pacemaker rate.
18 citations
Journal Article•
9 citations
8 citations
TL;DR: In this paper, the reduction of muscle artifacts in EEG was discussed, and the muscle artifact reduction in Electroencephalographic Recording (EEG) was discussed. American Journal of EEG Technology: Vol. 13, No. 1, pp. 13-26.
Abstract: (1973). Reduction of Muscle Artifact in Electroencephalographic Recording. American Journal of EEG Technology: Vol. 13, No. 1, pp. 13-26.
Journal Article•
Journal Article•
01 Jan 1973
TL;DR: The Loyola eCommons Thesis as mentioned in this paper has been accepted for inclusion in Master's Theses and Dissertations by an authorized administrator, and is brought to you for free and open access.
Abstract: This Thesis is brought to you for free and open access by the Theses and Dissertations at Loyola eCommons. It has been accepted for inclusion in Master's Theses by an authorized administrator of Loyola eCommons. For more information, please contact ecommons@luc.edu. social intelligence and encouraged him to explore the possibilities. It was Dr. Emil J. Posavac whose patient advice concerning the intricacies of design and measurement helped this study through the painful phases of its development. The author is grateful to both professors for the time they generously gave to the reading of the text at various points in its odyssey, offering suggestions for improvement. Fin;illy J thP a1.1thor would like to thank the 60 subjects who participated in the study. Without continued undergraduate cooperation neither this study, nor many others would have been possible. was taken at the University of Minnesota prior to coming to Loyola to begin the program in clinical psychology.
TL;DR: A new method accurately measures the cycle length of artificial pacemakers with the conventional electrocardiograph and the 60-Hz AC interference artifact.
Abstract: A new method accurately (2 msec, 0.2 beats/minute) measures the cycle length of artificial pacemakers with the conventional electrocardiograph and the 60-Hz AC interference artifact. The m...
01 Jan 1973
TL;DR: In this article, it was shown that external events inserted by computer program in accordance with a random sequence of time intervals would bisect a greater proportion of long response times, and thus that the parameters of the resulting distributing would be greater than the parameters in the parent distribution or of a distribution in which responses were selected at random.
Journal Article•
Proceedings Article•
01 Nov 1973
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