Zobrazeno 1 - 10
of 156
pro vyhledávání: '"Gregory T. A. Kovacs"'
Autor:
Gregory T A Kovacs, Mark Shadden
Publikováno v:
PLoS ONE, Vol 12, Iss 7, p e0181381 (2017)
NASA's periodic selection of astronauts is a highly selective process accepting applications from the general population, wherein the mechanics of selection are not made public. This research was an effort to determine if biases (specifically age) ex
Externí odkaz:
https://doaj.org/article/40e9e8a286484529a745288bc24eae56
Publikováno v:
PLoS ONE, Vol 7, Iss 4, p e36217 (2012)
BACKGROUND: Methods for the electrical inhibition of cardiac excitation have long been sought to control excitability and conduction, but to date remain largely impractical. High-amplitude alternating current (AC) stimulation has been known to extend
Externí odkaz:
https://doaj.org/article/94a619874d3b458aba0853d65c3dd979
Autor:
Omer T. Inan, Laurent Giovangrandi, Richard M. Wiard, Corey McCall, Rea Rostosky, Charles Marsh Cuttino, Gregory T. A. Kovacs
Publikováno v:
EMBC
The use of a noninvasive hemodynamic monitor to estimate arterial stiffness, by measurement of pulse transit time (PTT), was demonstrated in microgravity. The monitor's utility for space applications was shown by establishing the correlation between
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c112fe4b8e85d7a80e7722c552740eb
https://pubmed.ncbi.nlm.nih.gov/26737764
https://pubmed.ncbi.nlm.nih.gov/26737764
Publikováno v:
IEEE Transactions on Biomedical Engineering. 59:1381-1390
A novel modality for the electrical stimulation of cardiac cells is described. The technique is based on HF stimulation-burst of HF (1-25 kHz) biphasic square waves-to depolarize the cells and trigger action potentials (APs). HF stimulation was demon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8eea576f2b23616944329e8337bb0029
https://doi.org/10.1109/tbme.2012.2188136
https://doi.org/10.1109/tbme.2012.2188136
Publikováno v:
IEEE Transactions on Information Technology in Biomedicine. 15:864-869
Analyzing systolic time intervals-specifically the preejection-period (PEP)-is widely accepted as one of the few methods for the noninvasive assessment of cardiac contractility. In this paper, we investigated the ballistocardiogram (BCG) as a way to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::068260d629c7edc4b117fe2f5f1970be
https://doi.org/10.1109/titb.2011.2161998
https://doi.org/10.1109/titb.2011.2161998
Autor:
Brian Argyres, Omer T. Inan, Richard M. Wiard, Laurent Giovangrandi, Mozziyar Etemadi, Gregory T. A. Kovacs
Publikováno v:
Medical & Biological Engineering & Computing. 49:213-220
Ballistocardiography (BCG) is a non-invasive technique used to measure the ejection force of blood into the aorta which can be used to estimate cardiac output and contractility change. In this work, a noise sensor was embedded in a BCG measurement sy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4684214caefa888ce0e7c428994558e
https://doi.org/10.1007/s11517-010-0722-y
https://doi.org/10.1007/s11517-010-0722-y
Autor:
E Yegân Erdem, Yu-Ming Chen, Robert B. Darling, Gregory T. A. Kovacs, John W. Suh, Matthew H. Mohebbi, Karl F. Böhringer
Publikováno v:
Journal of Microelectromechanical Systems. 19:433-442
We describe a walking microrobot that is propelled by cilialike thermal bimorph actuator arrays. The robot consists of two actuator array chips, each having an 8 × 8 array of “motion pixels,” which are composed of four orthogonally oriented cili
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e87bd92ec986a8449b227cf7db9f9b2f
https://doi.org/10.1109/jmems.2010.2041897
https://doi.org/10.1109/jmems.2010.2041897
Autor:
Omer T. Inan, Gregory T. A. Kovacs
Publikováno v:
IEEE Transactions on Biomedical Circuits and Systems. 4:93-100
A novel two-electrode biosignal amplifier circuit is demonstrated by using a composite transimpedance amplifier input stage with active current feedback. Micropower, low gain-bandwidth product operational amplifiers can be used, leading to the lowest
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d723548f63c2fa1001452a549ae0f131
https://doi.org/10.1109/tbcas.2009.2032096
https://doi.org/10.1109/tbcas.2009.2032096
Publikováno v:
IEEE Transactions on Biomedical Engineering. 57:722-727
An adaptive noise canceller was used to reduce the effect of floor vibrations on ballistocardiogram (BCG) measurements from a modified electronic bathroom scale. A seismic sensor was placed next to the scale on the floor and used as the noise referen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d889e4d22e8788732ce503c7902f2e9e
https://doi.org/10.1109/tbme.2009.2018831
https://doi.org/10.1109/tbme.2009.2018831
Autor:
Joseph C. Wu, Ning Sun, Kitchener D. Wilson, Xiaoyan Xie, Laurent Giovangrandi, Gregory T. A. Kovacs, Michael Q. Chen
Publikováno v:
Cellular and Molecular Bioengineering. 2:625-635
Stem cell therapy is emerging as a promising clinical approach for myocardial repair. However, the interactions between the graft and host, resulting in inconsistent levels of integration, remain largely unknown. In particular, the influence of elect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ff188917a60a9e3d72f022afa21674d
https://doi.org/10.1007/s12195-009-0096-0
https://doi.org/10.1007/s12195-009-0096-0