Effects of Interpolation on the Inverse Problem of Electrocardiography

Effects of ECG Signal Processing on the Inverse Problem of Electrocardiography Bear, Laura R.; Serinağaoğlu Doğrusöz, Yeşim; Svehlikova, J.; Coll-Font, J.; Good, W.; van Dam, E.; Macleod, R.; Abell, E.; Walton, R.; Coronel, R.; Haissaguerre, Michel; Dubois, R. (2018-01-01) The inverse problem of electrocardiography is ill-posed. Errors in the model such as signal noise can impact the accuracy of reconstructed cardiac electrical activity. It is currently not known how sensitive the inverse problem is to signal processing techniques. To evaluate this, experimental data from a Langendorff-perfused pig heart (n=1) suspended in a human-shaped torso-tank was used. Different signal processing methods were applied to torso potentials recorded from 128 electrodes embedded in the tank...
Effects of a priori parameter selection in minimum relative entropy method on inverse electrocardiography problem ONAK, Onder Nazim; Serinağaoğlu Doğrusöz, Yeşim; WEBER, GERHARD WİLHELM (2018-01-01) The goal in inverse electrocardiography (ECG) is to reconstruct cardiac electrical sources from body surface measurements and a mathematical model of torso-heart geometry that relates the sources to the measurements. This problem is ill-posed due to attenuation and smoothing that occur inside the thorax, and small errors in the measurements yield large reconstruction errors. To overcome this, ill-posedness, traditional regularization methods such as Tikhonov regularization and truncated singular value decom...
Effects of asynchronism and neighborhood size on clustering in self-propelled particle systems Şamiloǧlu, Andaç T.; Gazi, Veysel; Koku, Ahmet Buğra (2006-11-03) In this study, we analyze the effects of asynchronism and neighborhood size on the collective motion of multi-agent systems. Many studies performed on the collective motion of self propelled particle systems or basically a class of multi-agent systems are modeled to be synchronous. However, in nature and in robotic applications the autonomous agents mostly act asynchronously. Therefore, a model based on the asynchronous actions of agents is developed. The agents/particles are assumed to move with constant s...
Effects of Asynchronism and Neighborhood Size on Clusteringin Self-propelled Particle System Şamiloğlu, Andaç Töre; Gazi, Veysel; Koku, Ahmet Buğra (Springer, 2006-01-01)
EFFECTS OF THERMOPYHSICAL PROPERTIES AND ENTRANCE REGION ON THE DIMENSIONAL OPTIMIZATION OF MICROCHANNEL HEAT SINKS Turkakar, Goker; Okutucu Özyurt, Hanife Tuba (2011-06-03) Dimensional optimization of silicon microchannel heat sinks is performed by minimizing the total thermal resistance. Intel Core i7-900 Desktop Processor of chip core dimensions of 1.891 cm x 1.44 cm is considered as a reference processor which is reported to dissipate 130 W of heat. The properties are evaluated at the area weighted average of the fluid inlet and iteratively calculated outlet temperatures. The effects of the thermal and hydrodynamic entrance regions on heat transfer and flow are also investi...

Citation Formats

Y. Serinağaoğlu Doğrusöz, J. Bergquist, R. Dubois, W. Good, R. S. MacLeod, and A. Rababah, “Effects of Interpolation on the Inverse Problem of Electrocardiography,” 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/44504.