Pavlo Tkachenko

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Regularization schemes are frequently used for performing ranking tasks. This topic has been intensively studied in recent years. However, to be effective a regularization scheme should be equipped with a suitable strategy for choosing a regularization parameter. In the present study we discuss an approach, which is based on the idea of a linear combination(More)
We consider a polynomial reconstruction of smooth functions from their noisy values at discrete nodes on the unit sphere by a variant of the regularized least-squares method of An et al., SIAM J. Numer. Anal. 50 (2012), 1513–1534. As nodes we use the points of a positive-weight cubature formula that is exact for all spherical polynomials of degree up to 2M(More)
Motivated by the problem of satellite gravity gradiometry, which is the reconstruction of the Earth gravity potential from the satellite data provided in the form of the second-order partial derivatives of the gravity potential at a satellite altitude, we discuss a special regularization technique for solving this severely ill-posed problem in a spherical(More)
The choice of the kernel is known to be a challenging and central problem of kernel based supervised learning. Recent applications and significant amount of literature have shown that using multiple kernels (the so-called Multiple Kernel Learning (MKL)) instead of a single one can enhance the interpretability of the learned function and improve(More)
The intrasensory and sensor-effector interactions between inter-spike intervals of acoustic stem-evoked potentials with parameters of hands coordination was found with the help of correlation analysis. Role of excitation of ascending fibres of rostral part of the pons and lateral loop in mechanisms of the auditory-motor coordination was determined.(More)
Stable correlations between the amplitude parameters of stimulation myography of forearm muscles and parameters of bimanual coordination of complex voluntary purposeful movements during performance of tasks of different complexity were studied in men and women. We found that men are characterized by higher coordination of hand movements and selective(More)
BACKGROUND Despite the risk associated with nocturnal hypoglycemia (NH) there are only a few methods aiming at the prediction of such events based on intermittent blood glucose monitoring data. One of the first methods that potentially can be used for NH prediction is based on the low blood glucose index (LBGI) and suggested, for example, in Accu-Chek®(More)
Correlation analysis identified intrasensory and sensory-effector interactions of the interspike intervals of components of brainstem acoustic evoked potentials with measures of hand movement coordination. A role for the propagation of excitation via the ascending fibers of the rostral part of the pons and the lateral loop in the mechanisms of(More)
Analysis of the stable correlation of asymmetry of the acoustic stem evoked potentials intervals with parameters of bimanual coordination was performed. Different mechanisms of the auditory asymmetry at the stem level were found in men and women. Optimum bimanual performance in men is provided by adequate co-adjustment of sensor-motor system elements, and(More)