P C Ivanov
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Explore the profile of P C Ivanov including associated specialties, affiliations and a list of published articles.
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10
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2949
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Recent Articles
1.
Ashkenazy Y, Ivanov P, Havlin S, Peng C, Yamamoto Y, Goldberger A, et al.
Comput Cardiol
. 2003 Nov;
27:139-42.
PMID: 14632010
The cardiac interbeat (RR) increment time series can be decomposed into two sub-sequences: a magnitude series and a sign series. The authors show that the sign sequence, a simple binary...
2.
When human walking becomes random walking: fractal analysis and modeling of gait rhythm fluctuations
Hausdorff J, Ashkenazy Y, Peng C, Ivanov P, Stanley H, Goldberger A
Physica A
. 2002 May;
302(1-4):138-47.
PMID: 12033228
We present a random walk, fractal analysis of the stride-to-stride fluctuations in the human gait rhythm. The gait of healthy young adults is scale-free with long-range correlations extending over hundreds...
3.
Bernaola-Galvan P, Ivanov P, Nunes Amaral L, Stanley H
Phys Rev Lett
. 2001 Nov;
87(16):168105.
PMID: 11690251
We introduce a segmentation algorithm to probe the temporal organization of heterogeneities in human heartbeat interval time series. We find that the lengths of segments with different local mean heart...
4.
Ashkenazy Y, Ivanov P, Glass L, Goldberger A, Stanley H
Phys Rev Lett
. 2001 Aug;
87(6):068104.
PMID: 11497867
Patients at high risk for sudden death often exhibit complex heart rhythms in which abnormal heartbeats are interspersed with normal heartbeats. We analyze such a complex rhythm in a single...
5.
Hu K, Ivanov P, Chen Z, Carpena P, Stanley H
Phys Rev E Stat Nonlin Soft Matter Phys
. 2001 Jul;
64(1 Pt 1):011114.
PMID: 11461232
Detrended fluctuation analysis (DFA) is a scaling analysis method used to estimate long-range power-law correlation exponents in noisy signals. Many noisy signals in real systems display trends, so that the...
6.
Nunes Amaral L, Ivanov P, Aoyagi N, Hidaka I, Tomono S, Goldberger A, et al.
Phys Rev Lett
. 2001 Jun;
86(26 Pt 1):6026-9.
PMID: 11415420
We test whether the complexity of the cardiac interbeat interval time series is simply a consequence of the wide range of scales characterizing human behavior, especially physical activity, by analyzing...
7.
Ashkenazy Y, Ivanov P, Havlin S, Peng C, Goldberger A, Stanley H
Phys Rev Lett
. 2001 Apr;
86(9):1900-3.
PMID: 11290277
We propose an approach for analyzing signals with long-range correlations by decomposing the signal increment series into magnitude and sign series and analyzing their scaling properties. We show that signals...
8.
Goldberger A, Amaral L, Glass L, Hausdorff J, Ivanov P, Mark R, et al.
Circulation
. 2000 Jun;
101(23):E215-20.
PMID: 10851218
The newly inaugurated Research Resource for Complex Physiologic Signals, which was created under the auspices of the National Center for Research Resources of the National Institutes of Health, is intended...
9.
Ivanov P, Amaral L, Goldberger A, Havlin S, Rosenblum M, Struzik Z, et al.
Nature
. 1999 Jun;
399(6735):461-5.
PMID: 10365957
There is evidence that physiological signals under healthy conditions may have a fractal temporal structure. Here we investigate the possibility that time series generated by certain physiological control systems may...
10.
Ivanov P, Rosenblum M, Peng C, Mietus J, Havlin S, Stanley H, et al.
Nature
. 1996 Sep;
383(6598):323-7.
PMID: 8848043
Biological time-series analysis is used to identify hidden dynamical patterns which could yield important insights into underlying physiological mechanisms. Such analysis is complicated by the fact that biological signals are...