http://www.ift.uib.no/~antonych/resume.html

Gennady A. Ryzhikov

Department of Physics and Technology, University of Bergen

Allégaten 55, N-5007 Bergen, Norway

Phone: +47 55 543948; Fax: +47 55 543961
E-mail: Gennady.Ryzhikov@ift.uib.no
Web: http://www.ift.uib.no/~antonych/



BACKGROUND
Cat Quant - logo: Dept. of Physics, SPbU
Theoretical Physics, University of St. Petersburg (SPbU), Russia

QUALIFICATION SUMMARY

MS in theoretical physics ("Calibration theories of relativistic extended objects")
PhD in geophysics, more than 20 years of experience in R&D:
applied ill-posed and inverse problems, theory of regularization,
applied mathematics, data processing, parameter identification,
computerized tomography, optimization problems, etc., mainly in geophysics:
mathematical geophysics/algorithm development/novel approaches
to signal processing, multiple suppression, diffraction tomography
in seismics/optics, 3D depth seismic imaging, seismic monitoring,
geostatistics,etc.
Author of a few novel approaches to data processing.
Real data  have been processing with the approaches:
satellite/airborne IR/UV radiation data; side-scanning sonar data,
seismic data: VSP, 2D/3D, 3C, etc.; in particular:
        VSP- and 3D-data from Norsk Hydro:
   Biryulina, M. and Ryzhikov, G., 1997,
Convex Body Regularization (CoBR) in Linear Inversion/Deconvolution,
59th EAGE Annual Conference, Geneva, Switzerland, 1997, P122;
        3C crosswell-data from Conoco:
   M.S. Biryulina, K.S. Osypov, G.A. Ryzhikov, J.A. Scales, 1996
Seismic Inversion Using Energetic Envelopes,
AGU 96 Fall Meeting, S72B-03;
       regional (Italy, Germany, Norway) seismological network 3C-data
   Ryzhikov, G., Biryulina, M. and E. Husebye, 1996,
A novel approach to automatic monitoring of regional seismic eventsIRIS-page
IRIS Newsletter,v.15, pp. 12-14;
        2D-data from Norsk Hydro:
   G.A.Ryzhikov and M.S. Biryulina , 1998,
Sharp Deconvolution in Elimination  of Multiples:SEG-98.pdf: ~240 Kb
68th  Ann. Internat. Mtg. Soc. Expl. Geophys.,
Expanded Abstracts, ST-18.3, pp. 1983-1986.
    Biryulina, Marina and  Ryzhikov, Gennady,  1999,
MSvE-  A novel approach to statistical estimation of primaries
superimposed on incoherent multiplesEAGE99: ~110 Kb (ps.gz: 110Kb)
61st Mtg. Eur. Assoc. Expl Geophys.,
Extended Abstracts,  99, Session:  1-10
   Ryzhikov, Gennady  and  Biryulina, Marina,  1999,
Removal of intrabed multiples via Source-Signature Invariant Inversion,
69th  Ann. Internat. Mtg. Soc. Expl. Geophys.,
Expanded Abstracts, Vol. II, SPRO 1.8, pp. 1076-1079  (PDF: 575 Kb)  (ps.gz: 430 Kb)
   Biryulina, Marina and  Ryzhikov, Gennady,  2000,
Imaging of reflectors under uncertainties in macromodelEAGE2000: ~250 Kb(PDF: 250Kb)
62nd Mtg. Eur. Assoc. Expl Geophys.,
Extended Abstracts,  2000, Session:  B-55
   Ryzhikov, Gennady and Biryulina, Marina,  2001,
Can we hear seabed lithology from shipboard ?AAPG 2001, St. Petersburg: ~170 Kb  (PDF: 340 Kb)   (ps.gz: 170Kb)
in: VNIGRI / AAPG Regional International Conference, ,
July 15-18, 2001, St. Petersburg, Russia,
Extended Abstracts,  Session:  P4 -8

   Ryzhikov, Gennady and Biryulina, Marina,  2004,
Predicting large stochastic system evolution (COIF)

    2008
Retrieval of the physiological state of human skin from UV-Vis reflectance spectra
Journal of Photochemistry and Photobiology B: Biology, 93 (1), 2008, pp. 23-31

Changes in human skin after topical PDT with hexyl aminolevulinate
Photodiagnosis and Photodynamic Therapy, 5 (3), 2008, pp. 176-181

    2009
Optical transfer diagnosis of pigmented lesions: a pilot study
Skin Research and Technology, 15, 2009, pp. 330-337

    2010
Optical Transfer Diagnosis of Pigmented Lesions
Dermatologic Surgery, 36, 2010, pp. 1979-1986

    2011
Modeling of radiation transport in coupled atmosphere-snow-ice-ocean systems
Journal of Quantitative Spectroscopy & Radiative Transfer, 112, 2011, pp. 714-726

    Patents
W0 2009/117485 A3
Optical method for determining morphological parameters and physiological properties of tissue
W0 2009/094623 A3
Method for discriminating between malignant and benign tissue lesions



EMPLOYMENT
Bergen University logo
Senior Researcher at the University of Bergen, Norway : Since 1993
St. Petersburg State University: 275 years
Senior research scientist, Institute of Physics, SPbU, Russia: Prior to 1993


ALGORITHM CREATION skills,  e.g.

Author of a new global optimization algorithm ( RGA-algorithm),
which has been successfully applied for 3D nonlinear inversion:
3D nonlinear inversion by entropy of image contrast optimization,  1995,
 Nonlinear Processes in Geophysics, v.2, n.3/4, pp. 228-240
                            and for real data processing:
  A new approach to coherency inversion by global optimization, 1995:
  65th SEG Meeting, 1995, Expanded Abstracts, p.1081-1083.

Author of a few novel algorithms for 3D prestack inversion/migration, e.g.
 Moser, T., Biryulina, M. and G. Ryzhikov, 1997,
  Born Inversion in Realistic Backgrounds by Means
  of Recursive Green's Functions,
  in: Inverse Problems of Wave Propagation and Diffraction,
  G. Chavent and P.C. Sabatier, Eds.,
  Lecture Notes in Physics, Vol. 486, Springer, pp.306-319

Author (with V. Troyan) of a monograph (in Russian *):
Ryzhikov  G.A.  and  V.N. Troyan,
Tomography  and  remote  sensing inverse problems,
St.Petersburg Univ. Press, St. Petersburg, 1994, 220 pp.

Author of novel METHODS/ALGORITHMS of regularization:
        Realized as scientific software,
        published mostly in technical reports:
Regularization in a  Sobolev space of infinite order
'Convex Body Regularization'  (CoBR:
 constrains on  values of a set of given linear functionals on
 an estimated function)
Combined statistical/functional regularization
Self-adaptive regularization, etc.

Author of novel METHODS/ALGORITHMS of machine learning/artificial intelligence
        Realized as a nolinear binary classifier on labeled noisy data sets:
        Patent W0 2009/117485 A3



LANGUAGE

Russian, English



OTHER PERTINENT INFORMATION

Supervision of PhD students, research assistants, research seminars,
lecturing, an ability to work with specialists in varied fields,
strong interest in interdisciplinary researches,
R&D-project initiation/leadership.


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*Some  topics  from the book were published  in English  ,
 yet  in   "Mathematical Problems in the Theory of Wave Propagation",
 Part 26,  1997,  Part 28,  1999,  or  in V.Troyan's  lectures  "Inverse  seismic  problems"
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