Grzegorz Graff - Science profile - Bridge of Knowledge


Profile photo: prof. dr hab. Grzegorz Graff

prof. dr hab. Grzegorz Graff


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Head of Doctoral Studies

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Vice-Dean for Scientific Research

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Publication showcase

  • Persistent homology as a new method of the assessment of heart rate variability

    - PLOS ONE - Year 2021

    Heart rate variability (hrv) is a physiological phenomenon of the variation in the length of the time interval between consecutive heartbeats. In many cases it could be an indicator of the development of pathological states. The classical approach to the analysis of hrv includes time domain methods and frequency domain methods. However, attempts are still being made to define new and more effective hrv assessment tools. Persistent...

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  • Detecting coupling directions with transcript mutual information: A comparative study


    Causal relationships are important to understand the dynamics of coupled processes and, moreover, to influence or control the effects by acting on the causes. Among the different approaches to determine cause-effect relationships and, in particular, coupling directions in interacting random or deterministic processes, we focus in this paper on information-theoretic measures. So, we study in the theoretical part the difference between...

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  • Computing algebraic transfer entropy and coupling directions via transcripts

    • J. Amigó
    • R. Monetti
    • B. Graff
    • G. Graff

    - CHAOS - Year 2016

    Most random processes studied in nonlinear time series analysis take values on sets endowed with a group structure, e.g., the real and rational numbers, and the integers. This fact allows to associate with each pair of group elements a third element, called their transcript, which is defined as the product of the second element in the pair times the first one. The transfer entropy of two such processes is called algebraic transfer...

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Obtained scientific degrees/titles

  • 2020-07-21

    Obtained science title

    prof. dr hab. mathematics (Natural sciences)
    Uniwersytet Gdański
  • 2010-04-09

    Obtained science degree

    dr hab. Mathematics (Mathematics)
    Uniwersytet Adama Mickiewicza

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