Potirakis Stylianos (Stelios)


 Office:  ΖΒ106, Building Ζ, Campus 2

 Phone: +30 210-5381550

 Lab: ΖΒ103, ZB 205, Building Ζ, Campus 2

 Lab Phone: +30 210-5381222, +30 210-5381181

 Fax: +30 210-5381514

 E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.



2002 - PhD in Physics, Department of Electronics, Computers, Telecommunications and Control / Faculty  of  Physics  /  School  of  Science  /  National  and  Kapodistrian  University  of  Athens (UOA), Greece.

1996 - M.Sc. degree in Electronics and Communications, School of Science / National and Kapodistrian University of Athens, Greece.

1993 - B.Sc. degree in Physics with First Class Honors, Faculty of Physics / School of Science / National and Kapodistrian University of Athens, Greece



Research Interests

DSP, complex systems time-series analysis (audio, geophysical, physiological, financial, material fracture experiments AE/EME etc.), electroacoustics, applied acoustics, acoustic ecology, acoustic noise control, electronic measurements, special measurement instrument's development (e.g., high energy physics, earthquake precursors acquisition, textiles), characterization of smart/ multi-function materials, and wireless sensor networks (including acoustic ones, WASN).


Representative Publications

- G. Balasis, I. A. Daglis, Y. Contoyiannis, S. M. Potirakis, C. Papadimitriou, N. S. Melis, O. Giannakis, A. Papaioannou, A. Anastasiadis, C. Kontoes, Observation of intermittency-induced critical dynamics in geomagnetic field time series prior to the intense magnetic storms of March, June and December 2015, Journal of Geophysical Research: Space Physics, 123. (2018), 1-20, https://doi.org/10.1002/2017JA025131.

- S. A. Mitilineos, S. M. Potirakis, N.-A. Tatlas, M. Rangoussi, A two-level sound classification platform for environmental monitoring, J.Sensors, 2018, 5828074 (1-13), https://doi.org/10.1155/2018/5828074.

- S. M. Potirakis, T. Asano, M. Hayakawa, Criticality analysis of the lower ionosphere perturbations prior to the 2016 Kumamoto (Japan) earthquakes as based on VLF electromagnetic wave propagation data observed at multiple stations, Entropy 2018, 20, 199(1:17), https://doi.org/10.3390/e20030199.

- S.M. Potirakis, Y. Contoyiannis, T. Asano, M. Hayakawa, Intermittency-induced criticality in the lower ionosphere prior to the 2016 Kumamoto earthquakes as embedded in the VLF propagation data observed at multiple stations, Tectonophysics, 722, 422–431, 2018, https://doi.org/10.1016/j.tecto.2017.11.020.

- D. Mastrogiannis, S.M. Potirakis, Experimental study of the dynamic evolution of cumulative energy release during LiF fracture under uniaxial compression, Int. J. Solids and Structures,132–133, 59–65, 2018, https://doi.org/10.1016/j.ijsolstr.2017.09.005.

- S.M. Potirakis, D. Mastrogiannis, Critical features revealed in acoustic and electromagnetic emissions during fracture experiments on LiF, Physica A, 485, 11-22, 2017, https://doi.org/10.1016/j.physa.2017.05.025.

- S.M. Potirakis, Y. Contoyiannis, F. K. Diakonos, M. P. Hanias, Intermittency-induced criticality in a resistor-inductor-diode circuit, Physical Review E, 95, 042206, 2017, https://doi.org/10.1103/PhysRevE.95.042206.

- S. M. Potirakis, M. Hayakawa, A. Schekotov, Fractal analysis of the ground-recorded ULF magnetic fields prior to the 11 March 2011 Tohoku earthquake (MW= 9): discriminating possible earthquake precursors from Space-sourced disturbances, Natural Hazards, 85, 59-86, 2017, https://doi.org/10.1007/s11069-016-2558-8

- S. M. Potirakis, Y. Contoyiannis, N. S. Melis, J. Kopanas, G. Antonopoulos, G. Balasis, C. Kontoes, C. Nomicos, K. Eftaxias, Recent seismic activity at Cephalonia (Greece): a study through candidate electromagnetic precursors in terms of non-linear dynamics, Nonlin. Processes Geophys., 23, 223-240, 2016, https://doi.org/10.5194/npg-23-223-2016.

- Y. Contoyiannis, S.M. Potirakis, K. Eftaxias, L. Contoyianni, “Tricritical crossover in earthquake preparation by analyzing preseismic electromagnetic emissions”, Journal of Geodynamics, 84, 40-54, 2015, https://doi.org/10.1016/j.jog.2014.09.015.

- S. M. Potirakis, Y. Contoyiannis, K. Eftaxias, G. Koulouras, and C. Nomicos, “Recent Field Observations Indicating an Earth System in Critical Condition Before the Occurrence of a Significant Earthquake”, IEEE Geoscience and Remote Sensing Letters, 12(3), 631-635, 2015, https://doi.org/10.1109/LGRS.2014.2354374.

- N.-A. Tatlas, S. M. Potirakis, S. A. Mitilineos, M. Rangoussi, “On the effect of compression on the complexity characteristics of wireless acoustic sensor network signals”, Signal Processing, 107, 153-163, 2015, https://doi.org/10.1016/j.sigpro.2014.08.012.

- S. M. Potirakis, A. Karadimitrakis, and K. Eftaxias, Natural time analysis of critical phenomena: The case of pre-fracture electromagnetic emissions, Chaos 23 (2) (2013) 023117(1-14), https://doi.org/10.1063/1.4807908.

- S.M. Potirakis, N.-A. Tatlas, N. Zafeiropoulos, T. Ganchev, M. Rangoussi, Assessment of military intercom headsets for maximum voice reproduction level in high noise conditions, Applied Acoustics 74 (2013) 870–881, https://doi.org/10.1016/j.apacoust.2012.12.009.

- S. M. Potirakis, G. Minadakis, K. Eftaxias, Analysis of electromagnetic pre-seismic emissions using Fisher information and Tsallis entropy, Physica A 391 (1-2) (2012) 300–306. https://doi.org/10.1016/j.physa.2011.08.003.

- S.M. Potirakis and G.E. Alexakis, An Accurate Calculation of Miller Effect on the Frequency Response and on the Input and Output Impedances of Feedback Amplifiers, IEEE Transactions on Circuits and Systems II, Aug. 2005, vol. 52, no.8, pp. 491- 495, https://doi.org/10.1109/TCSII.2005.848986.

- S.M. Potirakis, G.E. Alexakis, M.C. Tsilis and P.J. Xenitidis, Time-Domain Nonlinear Modeling of Practical Electroacoustic Transducers, Journal of the Audio Engineering Society, 1999, vol 47, no. 6, pp. 447-468, http://www.aes.org/e-lib/browse.cfm?elib=12101.

- S.M. Potirakis and G.E. Alexakis, The Feedback Decomposition Theorem: The Evolution of Miller Theorem, International Journal of Electronics, 1998, vol. 85, no. 5, pp. 571-587, https://doi.org/10.1080/002072198133860.


Undergraduate Courses


Electroacoustics I 

Electroacoustics IΙ


Postgraduate Courses


Applied Acoustics


Mixed Signal Hardware Design

Research Methodology – Technical Writing

Complex Systems Theory

Complex Systems Time-Series Analysis


Curriculum Vitae


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