Year 2022

• Generalized Dobrushin Coefficients on Banach Spaces

  Publication

  • W. Bartoszek
  • M. Beśka
  • W. Florek

  - Bulletin of the Iranian Mathematical Society - Year 2022

  The asymptotic behavior of iterates of bounded linear operators (not necessarily positive), acting on Banach spaces, is studied. Through the Dobrushin ergodicity coefficient, we generalize some ergodic theorems obtained earlier for classical Markov semigroups acting on L1 (or positive operators on abstract state spaces).

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Year 2021

• Independent Domination Subdivision in Graphs

  Publication

  • A. Babikir
  • M. Dettlaff
  • M. A. Henning
  • M. Lemańska

  - GRAPHS AND COMBINATORICS - Year 2021

  A set $S$ of vertices in a graph $G$ is a dominating set if every vertex not in $S$ is adjacent to a vertex in~$S$. If, in addition, $S$ is an independent set, then $S$ is an independent dominating set. The independent domination number $i(G)$ of $G$ is the minimum cardinality of an independent dominating set in $G$. The independent domination subdivision number $\sdi(G)$ is the minimum number of edges that must be subdivided (each...

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• Polish Adaptation of the Pregnancy-Related Anxiety Questionnaire—Revised 2 for All Pregnant Women

  Publication

  • A. Michalik
  • L. Wójcicka
  • A. Zdun-Ryżewska
  • A. Czerwińska-Osipiak
  • M. Krzemiński
  • J. Olszewska
  • D. Klasa-Mazurkiewicz
  • A. C. Huizink

  - Healthcare - Year 2021

  Pregnancy-related anxiety (PrA) is a specific type of anxiety characteristic of the perinatal period. PrA can affect pregnancy and birth. However, no validated tool exists to measure PrA in Polish obstetric practice. The aim of this study was to translate the Pregnancy-Related Anxiety Questionnaire—Revised 2 (PRAQ-R2) into Polish and to evaluate its reliability and factorial and construct validity. This study was conducted in Poland...

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• Simple SIR models with Markovian control

  Publication

  • K. Bartoszek
  • W. Bartoszek
  • M. Krzemiński

  - Japanese journal of statistics and data science - Year 2021

  We consider a random dynamical system, where the deterministic dynamics are driven by a finite-state space Markov chain. We provide a comprehensive introduction to the required mathematical apparatus and then turn to a special focus on the susceptible-infected-recovered epidemiological model with random steering. Through simulations we visualize the behaviour of the system and the effect of the high-frequency limit of the driving...

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• The impact of freeze-thaw processes on a cliff recession rate in the face of temperate zone climate change

  Publication

  • H. Kaczmarek
  • A. Bartczak
  • S. Tyszkowski
  • M. Badocha
  • M. Krzemiński

  - CATENA - Year 2021

  Freeze-thaw action is a common type of geomorphological processes eroding cliff faces in the temperate climate zone. In our previous study, we assessed the geomorphological effects of freeze-thaw fluctuations occurring within the cliff of Jeziorsko Reservoir (central Poland). Based on those findings, we have now determined the number of freeze-thaw cycles to assess their historical impact on the studied cliff. We have also traced...

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