@article{ZolotovaPonyavinMarwanetal.2009,
  author    = {Zolotova, Nadezhda V. and Ponyavin, Dmitri I. and Marwan, Norbert and Kurths, J{\"u}rgen},
  title     = {Long-term asymmetry in the wings of the butterfly diagram},
  issn      = {0004-6361},
  doi       = {10.1051/0004-6361/200811430},
  year      = {2009},
  abstract  = {Aims. Sunspot distribution in the northern and southern solar hemispheres exibit striking synchronous behaviour on the scale of a Schwabe cycle. However, sometimes the bilateral symmetry of the Butterfly diagram relative to the solar equatorial plane breaks down. The investigation of this phenomenon is important to explaining the almost-periodic behaviour of solar cycles. Methods. We use cross-recurrence plots for the study of the time-varying phase asymmetry of the northern and southern hemisphere and compare our results with the latitudinal distribution of the sunspots. Results. We observe a long-term persistence of phase leading in one of the hemispheres, which lasts almost 4 solar cycles and probably corresponds to the Gleissberg cycle. Long-term variations in the hemispheric-leading do not demonstrate clear periodicity but are strongly anti-correlated with the long-term variations in the magnetic equator.},
  language  = {en}
}
@article{ZbilutMitchellGiulianietal.2004,
  author    = {Zbilut, J. P. and Mitchell, J. C. and Giuliani, A. and Colosimo, A. and Marwan, Norbert and Webber, C. L.},
  title     = {Singular hydrophobicity patterns and net charge : a mesoscopic principle for protein aggregation/folding},
  issn      = {0378-4371},
  year      = {2004},
  abstract  = {A statistical model describing the propensity for protein aggregation is presented. Only amino-acid hydrophobicity values and calculated net charge are used for the model. The combined effects of hydrophobic patterns as computed by the signal analysis technique, recurrence quantification, plus calculated net charge were included in a function emphasizing the effect of singular hydrophobic patches which were found to be statistically significant for predicting aggregation propensity as quantified by fluorescence studies obtained from the literature. These results suggest preliminary evidence for a mesoscopic principle for protein folding/aggregation. (C) 2004 Elsevier B.V. All rights reserved},
  language  = {en}
}
@article{ZbilutGiulianiColosimoetal.2004,
  author    = {Zbilut, J. P. and Giuliani, A. and Colosimo, A. and Mitchell, J. C. and Colafranceschi, M. and Marwan, Norbert and Webber, C. L. and Uversky, V. N.},
  title     = {Charge and hydrophobicity patterning along the sequence predicts the folding mechanism and aggregation of proteins : a computational approach},
  issn      = {1535-3893},
  year      = {2004},
  abstract  = {The presence of partially folded intermediates along the folding funnel of proteins has been suggested to be a signature of potentially aggregating systems. Many studies have concluded that metastable, highly flexible intermediates are the basic elements of the aggregation process. In a previous paper, we demonstrated how the choice between aggregation and folding behavior was influenced by hydrophobicity distribution patterning along the sequence, as quantified by recurrence quantification analysis (RQA) of the Myiazawa-Jernigan coded primary structures. In the present paper, we tried to unify the "partially folded intermediate" and "hydrophobicity/charge" models of protein aggregation verifying the ability of an empirical relation, developed for rationalizing the effect of different mutations on aggregation propensity of acyl-phosphatase and based on the combination of hydrophobicity RQA and charge descriptors, to discriminate in a statistically significant way two different protein populations: (a) proteins that fold by a process passing by partially folded intermediates and (b) proteins that do not present partially folded intermediates},
  language  = {en}
}
@article{WesselMarwanMeyerfeldtetal.2001,
  author    = {Wessel, Niels and Marwan, Norbert and Meyerfeldt, Udo and Schirdewan, Alexander and Kurths, J{\"u}rgen},
  title     = {Recurrence quantification analysis to characterise the heart rate variability before the onset of ventricular tachycardia},
  year      = {2001},
  abstract  = {Ventricular tachycardia or fibrillation (VT) as fatal cardiac arrhythmias are the main factors triggering sudden cardiac death. The objective of this recurrence quantification analysis approach is to find early signs of sustained VT in patients with an implanted cardioverter-defibrillator (ICD). These devices are able to safeguard patients by returning their hearts to a normal rhythm via strong defibrillatory shocks; additionally, they are able to store at least 1000 beat-to-beat intervals immediately before the onset of a life-threatening arrhythmia. We study the},
  language  = {en}
}
@article{WendiMerzMarwan2019,
  author    = {Wendi, Dadiyorto and Merz, Bruno and Marwan, Norbert},
  title     = {Assessing hydrograph similarity and rare runoff dynamics by cross recurrence plots},
  series = {Water resources research},
  volume    = {55},
  journal   = {Water resources research},
  number    = {6},
  publisher = {American Geophysical Union},
  address   = {Washington},
  issn      = {0043-1397},
  doi       = {10.1029/2018WR024111},
  pages     = {4704 -- 4726},
  year      = {2019},
  abstract  = {This paper introduces a novel measure to assess similarity between event hydrographs. It is based on cross recurrence plots (CRP) and recurrence quantification analysis (RQA), which have recently gained attention in a range of disciplines when dealing with complex systems. The method attempts to quantify the event runoff dynamics and is based on the time delay embedded phase space representation of discharge hydrographs. A phase space trajectory is reconstructed from the event hydrograph, and pairs of hydrographs are compared to each other based on the distance of their phase space trajectories. Time delay embedding allows considering the multidimensional relationships between different points in time within the event. Hence, the temporal succession of discharge values is taken into account, such as the impact of the initial conditions on the runoff event. We provide an introduction to cross recurrence plots and discuss their parameterization. An application example based on flood time series demonstrates how the method can be used to measure the similarity or dissimilarity of events, and how it can be used to detect events with rare runoff dynamics. It is argued that this methods provides a more comprehensive approach to quantify hydrograph similarity compared to conventional hydrological signatures.},
  language  = {en}
}
@article{WendiMarwanMerz2018,
  author    = {Wendi, Dadiyorto and Marwan, Norbert and Merz, Bruno},
  title     = {In Search of Determinism-Sensitive Region to Avoid Artefacts in Recurrence Plots},
  series = {International journal of bifurcation and chaos : in applied sciences and engineering},
  volume    = {28},
  journal   = {International journal of bifurcation and chaos : in applied sciences and engineering},
  number    = {1},
  publisher = {World Scientific},
  address   = {Singapore},
  issn      = {0218-1274},
  doi       = {10.1142/S0218127418500074},
  pages     = {15},
  year      = {2018},
  abstract  = {As an effort to reduce parameter uncertainties in constructing recurrence plots, and in particular to avoid potential artefacts, this paper presents a technique to derive artefact-safe region of parameter sets. This technique exploits both deterministic (incl. chaos) and stochastic signal characteristics of recurrence quantification (i.e. diagonal structures). It is useful when the evaluated signal is known to be deterministic. This study focuses on the recurrence plot generated from the reconstructed phase space in order to represent many real application scenarios when not all variables to describe a system are available (data scarcity). The technique involves random shuffling of the original signal to destroy its original deterministic characteristics. Its purpose is to evaluate whether the determinism values of the original and the shuffled signal remain closely together, and therefore suggesting that the recurrence plot might comprise artefacts. The use of such determinism-sensitive region shall be accompanied by standard embedding optimization approaches, e.g. using indices like false nearest neighbor and mutual information, to result in a more reliable recurrence plot parameterization.},
  language  = {en}
}
@article{WendiMarwan2018,
  author    = {Wendi, Dadiyorto and Marwan, Norbert},
  title     = {Extended recurrence plot and quantification for noisy continuous dynamical systems},
  series = {Chaos : an interdisciplinary journal of nonlinear science},
  volume    = {28},
  journal   = {Chaos : an interdisciplinary journal of nonlinear science},
  number    = {8},
  publisher = {American Institute of Physics},
  address   = {Melville},
  issn      = {1054-1500},
  doi       = {10.1063/1.5025485},
  pages     = {9},
  year      = {2018},
  abstract  = {One main challenge in constructing a reliable recurrence plot (RP) and, hence, its quantification [recurrence quantification analysis (RQA)] of a continuous dynamical system is the induced noise that is commonly found in observation time series. This induced noise is known to cause disrupted and deviated diagonal lines despite the known deterministic features and, hence, biases the diagonal line based RQA measures and can lead to misleading conclusions. Although discontinuous lines can be further connected by increasing the recurrence threshold, such an approach triggers thick lines in the plot. However, thick lines also influence the RQA measures by artificially increasing the number of diagonals and the length of vertical lines [e.g., Determinism (DET) and Laminarity (LAM) become artificially higher]. To take on this challenge, an extended RQA approach for accounting disrupted and deviated diagonal lines is proposed. The approach uses the concept of a sliding diagonal window with minimal window size that tolerates the mentioned deviated lines and also considers a specified minimal lag between points as connected. This is meant to derive a similar determinism indicator for noisy signal where conventional RQA fails to capture. Additionally, an extended local minima approach to construct RP is also proposed to further reduce artificial block structures and vertical lines that potentially increase the associated RQA like LAM. The methodology and applicability of the extended local minima approach and DET equivalent measure are presented and discussed, respectively.},
  language  = {en}
}
@misc{VossMeyerSchwonbecketal.2005,
  author    = {Voss, Henning and Meyer, Jeannette and Schwonbeck, Susanne and Fritsche, Immo and Hartmann, Bernhard and Wegwarth, Odette and Friedrich, Anke and Buchheister-Knappe, Stefanie and Marwan, Norbert and Bandau, Anja and Bullinger, Hans-J{\"o}rg and Weith, Thomas},
  title     = {Portal alumni},
  series = {Das Ehemaligen-Magazin der Universit{\"a}t Potsdam},
  volume    = {2005},
  journal   = {Das Ehemaligen-Magazin der Universit{\"a}t Potsdam},
  number    = {3},
  organization    = {Stabsstelle Studierendenmarketing/Alumniprogramm Im Auftrag der Pr{\"a}sidentin der Universit{\"a}t Potsdam},
  doi       = {10.25932/publishup-48160},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-481608},
  pages     = {58},
  year      = {2005},
  abstract  = {Liebe Leserin, lieber Leser, erforschen, was die Welt im Innersten zusammenh{\"a}lt- das ist f{\"u}r viele Studierende ein Traum. Doch welche Opfer muss man bringen, um ihn zu verwirklichen? Welche Bemfsperspektive hat der Bemf Forscher heute noch? Auch viele Absolventen der Universit{\"a}t Potsdam m{\"u}ssen sich diese Fragen beantworten. Zu welchen Antworten einige dabei gekommen sind und welche Probleme sie zu bew{\"a}ltigen haben, vom Spaß am Forschen und von Zukunfts{\"a}ngsten berichten sie in der Rubrik "Forscherkarrieren". Gelder f{\"u}r die Forschung fließen in Deutschland zu sp{\"a}rlich, verglichen mit anderen f{\"u}hrenden Industrienationen. So sind die Bedingungen f{\"u}r Forscher hierzulande nicht die besten. Manchen jungen Wissenschaftler zieht es- mitunter notgedrungen- ins Ausland. Wie Deutschland dadurch seine ZukunftsHihigkeit riskiert, thematisiert der Pr{\"a}sident der Fraunhofer-Gesellschaft, Prof. Dr. Hans-J{\"o}rg Bullinger, in der Rubrik "wissenstransfer". Auch die Universit{\"a}t ist kein Garant f{\"u}r eine gesicherte Zukunft in der Forschung. Wer sechs Jahre nach der Promotion den Sprung zur Professur nicht geschafft hat, geht einer ungewissen Zukunft als Privatdozent entgegen. Seit einigen Jahren gibt es neben der Habilitation noch einen zweiten Weg zur Professur- die Juniorprofessur. Auch an der Universit{\"a}t Potsdam gibt es seit 2002 Juniorprofessoren, von denen die ersten jetzt evaluiert wurden. N{\"a}heres dazu finden Sie ebenfalls in der Rubrik "wissenstransfer". Wer noch nach einer Finanzierungsm{\"o}glichkeit f{\"u}r seine Promotion sucht, findet Tipps in der Rubrik "wegweiser". Die Redaktion w{\"u}nscht Ihnen viel Vergn{\"u}gen beim Lesen von Portal alumni und freut sich auf zahlreiche Leserbriefe.},
  language  = {de}
}
@article{TrauthMarwan2022,
  author    = {Trauth, Martin H. and Marwan, Norbert},
  title     = {Introduction-time series analysis for Earth, climate and life interactions},
  series = {Quaternary science reviews : the international multidisciplinary research and review journal},
  volume    = {284},
  journal   = {Quaternary science reviews : the international multidisciplinary research and review journal},
  publisher = {Elsevier},
  address   = {Amsterdam [u.a.]},
  issn      = {0277-3791},
  doi       = {10.1016/j.quascirev.2022.107475},
  pages     = {3},
  year      = {2022},
  language  = {en}
}
@article{TrauthBookhagenMarwanetal.2003,
  author    = {Trauth, Martin H. and Bookhagen, Bodo and Marwan, Norbert and Strecker, Manfred},
  title     = {Multiple landslide clusters record quaternary climate changes in the northwestern Argentine andes},
  year      = {2003},
  abstract  = {The chronology of multiple landslide deposits and related lake sediments in the semi-arid eastern Argentine Cordillera suggests that major mass movements cluster in two time periods during the Quaternary, i.e. between 40 and 25 and after 5 14C kyr BP. These clusters may correspond to the Minchin (maximum at around 28-27 14C kyr BP) and Titicaca wet periods (after 3.9 14C kyr BP). The more humid conditions apparently caused enhanced landsliding in this environment. In contrast, no landslide-related damming and associated lake sediments occurred during the Coipasa (11.5- 10 14C yr BP) and Tauca wet periods (14.5-11 14C yr BP). The two clusters at 40-25 and after 5 14C kyr BP may correspond to periods where the El Ni{\~n}o-Southern Oscillation (ENSO) and Tropical Atlantic Sea Surface Temperature Variability (TAV) were active. This, however, was not the case during the Coipasa and Tauca wet periods. Lake-balance modelling of a landslide-dammed lake suggests a 10-15\% increase in precipitation and a 3-4 ° C decrease in temperature at ~30 14C kyr BP as compared to the present. In addition, time-series analysis reveals a strong ENSO and TAV during that time. The landslide clusters in northwestern Argentina are therefore best explained by periods of more humid and more variable climates.},
  language  = {en}
}