Print this page

Rumjana Stoicheva Ivanova - Simeonova

Position: Research Associate




Room number: 328

Phone: +359 2 979 64 54


Scientific degrees, institution, year:


Fields of Research:


biomechanics of the cardiovascular system – theoretical and experimental studies, modeling of transport processes in biological objects, statistical analysis of medical data (oxygen transport in biological tissues, biotechnology)


Extended Information

Recent Publications:

  1. Simeonov G., Ivanova R. (2008), An algebraic model of the diffusion-consumption processes in biofilm on a spherical particle, In: Proc. 12th Workshop on Transport Phenomena in Two-Phase Flow (Ch. Boyadjiev, J. Hristov , Eds.), Sunny Beach, 13-18 Sept. 2008, Bulgaria, pp. 91-102.

  2. Ivanova R., Simeonov G. (2006). Diffusion penetration depth of oxygen into biological tissues, In: Proc. 10th Congress Theor. Appl. Mech., 13-16 Sept. 2005, Varna, Bulgaria, vol. II, pp. 133-138.

  3. Simeonov G., Ivanova R. (2005). Mathematical model of a biofilm on a rotating disk, In: Transport Phenomena in Science and Technology - 2005, In: Proc. 10th Workshop on Transport Phenomena in Two-phase flow, Ch. Boyadjiev, J. Hristov (Eds.), Sunny Beach, 10-15 Sept. 2005, Bulgaria, vol. 1, pp. 51-60.

  4. Ivanova, R., Simeonov G.. (2002). Identification of the parameters of the Michaelis-Menten model of oxygen consumption based on data for tissue slice respiration, In: Proc. 9th National Congress on Theoretical and Applied Mechanics, 19-22 September 2001, Varna (Bulgaria) (ed. by Ya. Ivanov, A. Baltov, E. Manoach), vol.2, pp. 142-147.

  5. Ivanova R., Simeonov G.. (2000). Model study of the oxygen supply to rat myocardium in hypertrophy. In: Proc. Int. Conference on Biorheology and School for Young Scientists, Sofia, Bulgaria, 18-22 October 2000, pp. 139-142.

  6. Simeonov G.., Ivanova R. (1999). A numerical method for studying the oxygen supply to tissue in hypertrophy. In: Recent Advances in Numerical Methods and Applications II, Proc. 4th Int. Conf. on Numer. Methods and Application NMA’98, Sofia, 19-23 August 1998, World Scientific Publ. Co., pp. 576-584.

  7. Simeonov G., Ivanova R. (1996). Two-dimensional numerical model of oxygen supply to tissue. In: Proc. Seventh Nat. Conf. on Biomed. Physics and Engineering (with internat. participation), Sofia, 17-19 October 1996, pp. 175-177.

  8. Ivanova R., Simeonov G. (1993). A formula for PO2 distribution along a capillary, based on a linearized presentation of the oxygen consumption rate of the surrounding tissue. In: Int. Soc. of Biomechanics. XIVth Congress, Paris, 4-8 July 1993. Abstracts I (A-L), pp. 628-629.

  9. Karadimov D., Simeonov G., Ivanova R. (1988). One-parameter representation of Siggaard-Andersen experimental data on blood acid-base status. In: Proc. Third Int. School. for Young Scientists “Automation of Biotechnological Processes and Biological Experiments”, Varna, 24-27 September 1988, pp. 313-317 (in Russian).

  10. Ivanova R., Karadimov D., Simeonov G. (1987). Mathematical modeling of the external gas exchange of the organism. In: Proc. Second Nat. Scientific Session “Automation of Biotechnological Processes”, Varna, 7-9 May 1987, pp. 219-224 (in Bulgarian).

  11. Simeonov G., Karadimov D., Ivanova R. (1987). Express method for estimating of blood acid-base equilibrium parameters. In: Proc. Second Nat. Scientific Session “Automation of Biotechnological Processes”, Varna, 7-9 May 1987, pp. 235-241 (in Bulgarian)

  12. Karadimov D., Ivanova R., Simeonov G. (1986). Mathematical model of tissue hypoxy. In: Proc. Fifth Nat. Congress on Neurology, Sofia, November 1986, pp. 1-4 (in Bulgarian).

  13. Ivanova R., Tsonzorova M., Lorentz Z. (1986). Modeling of the ventricular septal defect by means of a physical model of the cardio-vascular system. In: Proc. Second Int. School. for Young Scientists “Automation of Biotechnological Processes and Biological Experiments”, Varna, 13-19 October 1986, pp. 337-340 (in Russian).

  14. Ivanova R., Lorentz Z., Tzonsorova M (1986). Simulation of ventricular septal defect. In: Proc. Fifth Int. Symposium “Simulation of Systems in Biology and Medicine”, Prague, pp. 0-12 (in Russian).

  15. Velitckova D., Ivanova R., Lorentz Z., Tzonsorova M. (1985). Some results of simulation of small ventricular septal defects. In: Proc. Fifth Nat. Congress Theor. Appl. Mech., Varna, 23-29 September 1985, BAS, Sofia, vol. 3, pp. 170-176 (in Russian).

  16. Savova A., Stoytchev S., Ivanova R. (1985). Ischemic heart desease strength determination using clinical, invasive and non-invasive parameters. In: Proc. of the IV-th Nat. Conference on Medical Physics and Technics, Sofia, pp. 97-102 (in Bulgarian).

  17. Savova A., Stoytchev S., Ivanova R.(1984). Method for classification of the left ventricle function for ischemic heart desease patients. In: Cardio-vascular problems, Med. # Fizk. Ed., Sofia, pp.115-121 (in Bulgarian).

  18. Savova A., Stoytchev S., Ivanova R. (1983). A method for classification of patients with ischemic heart desease. Bulgarian patent No 1612/6.05.1983, Medical Academy, Sofia.

  19. Ivanova R., Hristov H. (1981). On the application of W.D. Pickering’s and M.K. Patil’s cybernetic models for estimation of the cardio-vascular system activity. Biomechanics, BAS, Sofia, vol. 10, pp. 46-54 (in Bulgarian).



Union of Bulgarian Mathematicians


Modified date:13-03-2012