Home Page of Szymon Łęski

I am a postdoc at the Laboratory of Visual System, Nencki Institute of Experimental Biology. I did my PhD (in physics) at the Center for Theoretical Physics.  Research interests development of methods and tools to study local field potentials, current-source density estimation in two and three dimensions, synchronization measures, modelling of local field potentials, application of statistical methods to the analysis of neurophysiological data.

Neuroscience

Publications

1. D. K. Wójcik, S. Łęski:
   Current source density reconstruction from incomplete data,
   Neural Computation 22 (2010), 48-60, arXiv:0903.2379 [q-bio.QM]
2. A. Sobolewski, E. Kublik, D. A. Świejkowski, S. Łęski, J. K. Kamiński, A. Wróbel:
   Cross-trial correlation analysis of evoked potentials reveals arousal related attenuation of thalamo-cortical coupling,
   Journal of Computational Neuroscience (2010), doi: 10.1007/s10827-010-0220-0, preprint
3. M. J. Hunt, M. Falińska, S. Łęski, D. K. Wójcik, S. Kasicki:
   Differential effects produced by ketamine on oscillatory activity recorded in the rat hippocampus, dorsal striatum and nucleus accumbens,
   Journal of Psychopharmacology (2010), doi:10.1177/0269881110362126
4. S. Łęski, E. Kublik, D. A. Świejkowski, A. Wróbel, D. K. Wójcik:
   Extracting functional components of neural dynamics with Independent Component Analysis and inverse Current Source Density,
   Journal of Computational Neuroscience (2009), doi:10.1007/s10827-009-0203-1,
   preprint + supplementary figures, independent component viewer (includes data)
5. S. Łęski, D. K. Wójcik:
   Inferring coupling strength from event-related dynamics, pdf
   Phys. Rev. E 78, 041918 (2008), arXiv:0805.0532v1 [q-bio.NC]
6. S. Łęski, D. K. Wójcik, J. Tereszczuk, D. A. Świejkowski, E. Kublik, A. Wróbel:
   Inverse Current-Source Density method in 3D: reconstruction fidelity, boundary effects, and influence of distant sources, www
   Neuroinformatics 5 (2007), 207-222

Selected posters, abstracts, etc.

S. Łęski, E. Kublik, D. A. Świejkowski, A. Wróbel, D. K. Wójcik:
Extraction of functional components from multichannel LFP data,  Frontiers in Neuroscience
Supplementary material (independent component viewer + data)

Physics

My PhD thesis (2006) concerned mainly energy-minimizing initial data for two black holes. It also included a part concerning foliations with so-called "rigid spheres" and a chapter devoted to polyhomogeneous (non-smooth on the boundary) solutions to hyperbolic equations. In the thesis I presented an explicit formula for the conformal factor in "Misner initial data".

My MSc thesis (2002) was about the Trautman-Bondi mass (energy of gravitational field measured at null infinity).

Publications

1. J. Jezierski, J. Kijowski, S. Łęski:
   Energy-minimizing two black holes initial data, pdf
   Phys. Rev. D 76, 024014 (2007), arXiv:0706.0129 [gr-qc]
2. P.T. Chruściel, S. Łęski:
   Polyhomogeneous solutions of nonlinear wave equations without corner conditions,
   Journal of Hyperbolic Differential Equations 3 (2006), 81-141, math.AP/0506423
3. S. Łęski:
   Two black hole initial data, pdf
   Phys. Rev. D 71, 124018 (2005), ESI Preprint 1608, gr-qc/0502085
4. P.T. Chruściel, J. Jezierski, S. Łęski:
   The Trautman-Bondi mass of hyperboloidal initial data sets,
   Adv. Theor. Math. Phys. 8 (2004), 83-139, gr-qc/0307109

Contact

My e-mail is s.leski(at)nenckiOgovOpl
(replace O's with dots).

Mail address is:
Instytut Biologii Doswiadczalnej PAN
ul. Pasteura 3
02-093 Warszawa
Poland

Personal

I was born in Radomsko, Poland, on 16 Dec 1978. I am married and we have two children (born 2006 and 2008).

My hobbies include hiking and the game of go.