Visitors, seminars and focus weeks

We have invited around 20 colleagues for short visits. Each visit typically included giving a presentation; see here for ASG talks.
In addition to seminar talks we have been organizing focus week meetings:
Our first focus week took place from 7 to 10 September, where 12 scientists gave talks. Please see here for the programme of this meeting.
Our second focus week took place from 2 to 6 November, where 10 scientists gave talks. Please see here for the programme of this meeting.
In a way, we had a more informal third focus week from 22 to 27 November, with 8 scientists visiting the ASG and 4 of them giving talks. Please see here for their talks.

Research projects (initiated by ASG activities and ongoing projects supported by the ASG)

F.Bartumeus, D.Boyer, A.V.Chechkin, L.Giuggioli, R.Klages, J.Pitchford, N.W.Watkins, position paper on statistical physics and anomalous dynamics of foraging
F.Bartumeus, D.Boyer, A.V.Chechkin, L.Giuggioli, R.Klages, J.Pitchford, N.W.Watkins, A toolbox for analysing foraging data from an anomalous dynamics perspective
G.Blackburn, A.V.Chechkin, N.W.Watkins, R.Klages, Levy walks and optimality in foraging
D.Boyer, D.Campos, F.Bartumeus, Foraging with memory in seabirds
D.Boyer. A.Chechkin, Levy flights with resettings
D. Boyer, L. Giuggioli, Localization of random walks by memory
A.Cairoli, A.V.Chechkin, R.Klages, A.Baule, Frame invariance in anomalous dynamics
R.L.Collings, S.Delius, A.James, J.S.Plank, J.Pitchford, penguin foraging
P. Dieterich, O. Lindemann, M.L. Moskopp, S. Tauzin, A. Huttenlocher, R. Klages, A.V. Chechkin, A. Schwab, Asymmetric superdiffusion of neutrophils under chemotaxis
P.Dieterich, A.Schwab, A.V.Chechkin, R.Klages, Anomalous fluctuations properties of cell migration under chemical gradients
S.Gupta, L.Giuggioli, Animal home range models: a comparative analysis
R.Lloret-Cabot, R.Klages, A.V.Checkin, W.Ryu, F.Bartumeus, Anomalous dynamics in C.elegans
R.Klages, S.G.Gallegos, T.Hamalainen, J.Solanpaa, E.Rasanen, Diffusion in soft periodic potentials
N.W.Watkins, C.Franzke and S.C.Chapman, Hurst effect, `1/f' noises, and long range dependence

Articles (in alphabetical order)

F.Bartumeus, Behavioural ecology cannot turn its back on Levy walk research; Comment on "Liberating Levy walk research from the shackles of optimal foraging" by A.M. Reynolds, Physics of Life Reviews 14, 84-86 (2015)
A. Bodrova, A.V. Chechkin, A.G. Cherstvy, R. Metzler, Quantifying non-ergodic dynamics of force-free granular gases, Physical Chemistry Chemical Physics 17 21791-21798 (2015)
D.Boyer, I.Pineda, Slow Levy flights, Phys. Rev. E 93, 022103 (2015)
K. Burnecki, A. Wylomanska, A.V. Chechkin, Discriminating between Light- and Heavy-Tailed Distributions with Limit Theorem, PLoS One 10 (12), e0145604 (2015)
D.Campos, F.Bartumeus, E.P.Raposo, M.Vicenc, First-passage times in multiscale random walks: The impact of movement scales on search efficiency, Phys. Rev. E 92, 052702 (2015)
R.Klages, Extrem gesucht, Physik Journal 14 (12), 22-23 (2015) (News and Views article, in German)
M.Krummel, F.Bartumeus, A.Gerard, T-cell Migration, Search Strategies and Mechanisms, Nature Reviews Immunology 16 (2) (2016)
I. Pavlyukevich, Y. Li, Y. Xu, and A.V. Chechkin, Directed Transport Induced by Spatially Modulated Levy Flights, Journal of Physics A - Math. Theor. 48, 495004 (2015)
T. Sandev, A.V. Chechkin, H. Kantz, I.M. Sokolov, R. Metzler, Distributed-order diffusion equations and multifractality: Models and solutions, Phys. Rev. E 92, 042117 (2015)
R.M.Tromer, M.B.Barbosa MB, F.Bartumeus, J.Catalan, M.G.E.da Luz, E.P.Raposo, G.M.Viswanathan, Inferring Levy walks from curved trajectories: A rescaling method, Phys. Rev. E 92, 022147 (2015)

accepted, in print:
R.Klages, Search for food of birds, fish and insects, invited book chapter in: A.Bunde, J.Caro, J.Kaerger, G.Vogl (Eds.), Diffusive Spreading in Nature, Technology and Society. (Springer, Berlin); accepted (April 2016)
J.P. Taylor-King, R. Klages, S. Fedotov, R.A. Van Gorder, A Fractional Diffusion Equation for an n-Dimensional Correlated Levy Walk, Phys. Rev. E, accepted for publication, in print (June 2016)

F.Bartumeus, D.Campos, R.Lloret-Cabot, V.Mendez, W.Ryu, J.Catalan, Foraging under uncertainty: space use and search tradeoffs
A.V. Chechkin, E. Gudowska-Nowak, M. Bier, Breaking Microscopic Reversibility with Levy Flights
T.Graves, R.Gramacy, N.W.Watkins, C.Franzke, A brief history of long memory: Hurst, Mandelbrot and the road to ARFIMA, preprint arXiv:1406.6018
V.V. Palyulin, A.V. Chechkin, R. Klages, R. Metzler, Search reliability and search efficiency of combined Levy-Brownian motion: long relocations mingled with thorough local exploration, submitted to J. Phys. A: Math. Gen. (April 2016)
T. Sandev, A.V. Chechkin, A. Iomin, H. Kantz, R. Metzler, Generalized comb-like model with slow and ultraslow diffusion
Yu. Zhou, A.V. Chechkin, I.M. Sokolov, H. Kantz, Origin of temporal scaling behavior in earthquakes
N.W. Watkins, Mandelbrot's 1/f fractional renewal models of 1963-67: The non-ergodic missing link between change points and long range dependence, preprint arXiv:1603.00738


Conferences, workshops, symposia:
D. Boyer, invited talk Slow Levy flights and related path-dependent processes for animal movement at the International Workshop on Nonlinearity, Nonequilibrium and Complexity: Questions and Perspectives in Statistical Physics, Nov. 29 - Dec. 4, 2015, Mexico City
D.Boyer, invited participation at the workshop on Fission-Fusion Dynamics and Behavioral Flexibility: Comparative Perspectives Casa Hamaca, Valladolid, Yucatan, Mexico, 20-23 October 2015 (nb: no formal talks, only working sessions)
A.V.Chechkin, talk at the conference Anomalous diffusion: wild and bad?, Bad Wildbad, Black Forest; 3/10-7/10/2015
A.V. Chechkin, invited talk Scale-Invariant Brownian Motion in Heterogeneous Media at the KIAS Workshop on Anomalous Dynamics in Biological Systems, Korea Institute for Advanced Study, Seoul; 3/9-5/9/2015
R.Klages, invited talk at the symposium on Fluctuation driven phenomena in non-equilibrium statistical mechanics, Warwick, UK; 21-25/9/2015
R.Klages, talk at the conference Anomalous diffusion: wild and bad?, Bad Wildbad, Black Forest; 3/10-7/10/2015
R.Klages, invited plenary talk Search for Food of Birds, Fish and Insects at the conference Diffusion Fundamentals VI, Dresden, Germany; 23/8-26/8/2015 [talk]

Colloquia, seminars, lectures:
A.V.Chechkin, lecture for graduate students Fractional Kinetics and Levy Flights, Jagellonian University of Krakow, 30 November 2015
A.V.Chechkin, seminar Anomalous Langevin Equations and their use in Stochastic Climate Theory MPIPKS, Climate Group Meeting, 18 November 2015
A.V.Chechkin, seminar Scale-invariant Markov Random Motions in Inhomogeneous and Non-stationary Media, University of Padova, 09 November 2015
A.V. Chechkin, joint seminar in the groups "Statistical Physics and nonlinear dynamics" and "Physics of complex systems and neurophysics" at the Institute of Physics, Humboldt University of Berlin; 22/10/2015
R.Klages, seminar in the Ergodic Theory and Dynamical Systems group, Mathematics Institute, University of Warwick, 17/11/2015
R.Klages, colloquium at the Institute of Physics, University of Osnabrueck, 22/10/2015
R.Klages, seminar Statistical Physics and Anomalous Dynamics of Foraging, MPIPKS Dresden, 22 July 2015 [talk]
J.Pitchford, seminar Can Penguins Play Chess? at the Department of Mathematics and Statistics, University of Canterbury, New Zealand, 15/10/2015
N.W.Watkins, seminar Mandelbrot's other model of 1/f noise: "Conditional stationarity" and weak ergodicity breaking as seen from the mid sixties at the London Mathematical Laboratory, 20/11/2015


6-months project grant awarded from the Office of Naval Research Global (USA/UK) to support a visiting guest scientist (N.W.Watkins) and a project student (G.Blackburn) for our Advanced Study Group (approx. US$27,700)

Collaborations at MPIPKS

Dr. Eduardo Altmann
Junior Research Group on Dynamical systems and Social Dynamics
complex systems, nonlinear-deterministic and stochastic processes, statistical properties of collective human activities like language
Dr. Benjamin Friedrich staff scientist in the Division Biological Physics mechanical and chemical regulation in biological systems
Prof. Holger Kantz
research group Nonlinear Dynamics and Time Series Analysis
complex dynamics, nonlinear stochastic processes, (nonequilibrium) statistical physics, extreme events, time series analysis
Dr. Vasily Zaburdaev
research group Collective Dynamics of Cells
biofilms, motility, random walks and anomalous diffusion, chemotaxis

The Complex System Reading Group at PKS organised a 1 1/2h session on Foraging and optimal search strategies on 12 August 2015 in which some relevant papers introducing to this topic were discussed.