Results 131 to 140 of about 1,703,051 (162)
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A novel control architecture for physiological tremor compensation in teleoperated systems
The International Journal of Medical Robotics and Computer Assisted Surgery, 2012AbstractBackgroundTelesurgery delivers surgical care to a ‘remote’ patient by means of robotic manipulators. When accurate positioning of the surgeon's tool is required, as in microsurgery, physiological tremor causes unwanted imprecision during a surgical operation.
A, Ghorbanian +4 more
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Compensation of Physiological Motion Using Linear Predictive Force Control
2008 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2008This paper proposes a new approach to compensate the physiological motion, induced by respiration and heart beating, for robotized minimally invasive cardiac surgery. The control algorithm, based on a linear predictive control, uses the effort information applied on the heart by the instrument.
Michel Dominici, Philippe Poignet
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Vestibular Compensation:Physiological und Clinical Aspects
Acta Oto-Laryngologica, 1983Vestibular compensation is achieved by means of a multisensory substitution process. Experimental and clinical observations indicate that patients, suffering from a sudden loss of vestibular function, should get an early multisensory training in order to induce adaptive changes as soon as possible.
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Neurocomputing, 2001
Abstract In a typical neurophysiological recording, the shape of the voltage trace due to an action potential depends, among other things, on the mutual geometry of the tissue and the electrode, and on the overall health of the preparation. These parameters change throughout the duration of the experiment, typically continuously and slowly, with ...
Penio S. Penev +2 more
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Abstract In a typical neurophysiological recording, the shape of the voltage trace due to an action potential depends, among other things, on the mutual geometry of the tissue and the electrode, and on the overall health of the preparation. These parameters change throughout the duration of the experiment, typically continuously and slowly, with ...
Penio S. Penev +2 more
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Physiological Motion Compensation in Robotized Surgery Using Force Feedback Control
Proceedings - IEEE International Conference on Robotics and Automation, 2007This paper presents a force feedback control scheme for the compensation of periodic motions of organs induced by respiration or heartbeat in minimally invasive robotized surgery. It applies surgical tasks involving a contact between an instrument and a moving organ. It is well known that conventional force control allows for compensating the motion of
Guillaume Morel
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Physiological Compensation for Toxic Actions of Organophosphate Insecticides
1989The neurochemical changes which could serve as physiological compensatory mechanisms during recovery from a high level acute intoxication with an organophosphate anticholinesterase were studied concurrently with behavioral deficits resulting from the intoxication.
Janice E. Chambers, Howard W. Chambers
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Theory, simulation, and compensation of physiological motion artifacts in functional MRI
Proceedings of 1st International Conference on Image Processing, 2002Mapping the location of brain activity is a new and exciting application of magnetic resonance imaging (MRI). This application area has already seen the use of a variety of magnetic resonance image acquisition methods, including spin-warp, spiral k-space, and echo-planar imaging, each of which has its own advantages and disadvantages.
Douglas C. Noll, Walter Schneider
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Intrauterine asphyxia and the breakdown of physiologic circulatory compensation in fetal sheep
American Journal of Obstetrics and Gynecology, 1990In response to acute hypoxemia, the fetus invokes physiologic compensatory mechanisms that cause a preferential redistribution of the circulation to sustain the brain, heart, and adrenal gland and maintain blood flow to the placenta. These mechanisms are available for a limited time and eventually the fetus is no longer able to maintain preferential ...
B S, Block +4 more
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Physiological consequences of intermittent exercise during compensable and uncompensable heat stress
Journal of Applied Physiology, 1991Time-weighted averaging is a traditional method used in heat stress analyses to approximate, in terms of a single continuous level of heat production, the rate of heat production from complex intermittent exercise patterns. Physiological responses during intermittent and continuous exercise were studied in four subjects exposed to heat stress in which
K K, Kraning, R R, Gonzalez
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An impedance control strategy for a hand-held instrument to compensate for physiological motion
2012 IEEE International Conference on Robotics and Automation, 2012Current trends in robotic cardiac surgery presage for allowing physiological motion compensation in beating-heart surgery. However, interacting with fast moving soft organs by means of stiff instruments/robots is challenging. This paper concerns comanipulation with a hand-held instrument, the goal being to allow the surgeon to perform low frequency ...
Juan Manuel Florez +2 more
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