Invited talks at conferences
1. J. W. Corbett Symposium, Albany, NY(USA) 1989.
2. Gordon Conference on “Point Defects, Line Defects and Interfaces", Plymouth, N.H. (USA) 1989, invited poster
3. Int. Conf. on Quantum Chemistry of Solids, Riga, (Latvia) 1990.
4. 3rd Int. Summer School and Workshop on New Developments in Semiconductor Physics, Balatonfüred (H) 1994.
5. Japan/Eastern Europe Joint Seminar on Advanced Computations in Engineering, Warsaw (PL) 1994.
6. NATO ARW on "Early Stages of Oxygen Precipitation in Silicon" Exeter (UK) 1996.
7. Int. Workshop on Materials Simulation, Chemnitz (D) 1996.
8. Int. Workshop on Hydrogen Defects in Semiconductors, Exeter (UK) 1999.
9. European Conf. on “Silicon Carbide and Related Materials”, Erlangen (D) 2000.
10. Int. Conf. on “Doping Issues in Wide Band Gap Semiconductors”, Exeter (UK) 2001.
11. Annual Meeting of the Swedish “SiC Electronics Program”, Vårdnäs (S) 2001.
12. NATO ASI on “Computational Materials Science”, Il Ciocco (Italy) 2001.
13. 10th Int. Conf. on Shallow Level Centers in Semiconductors, Warsaw (P) 2002.
14. UK Workshop on Physics of Group IV Semiconductors, Exeter (UK) 2003.
15. European Conf. on “Silicon Carbide and Related Materials”, Bologna (I) 2004, Plenary.
16. IUMRS-ICMAT Conf. on Advanced Materials, SiC Symposium, Singapore 2005.
17. 9th Int. Conf. on Atomically Controlled Surfaces, Interfaces and Nanostructures (ACSIN-9), Tokyo, 2007.
18. EMRS-2008 Spring Meeting, Symposium I: “Front-end junction and contact formation in future Silicon/Germanium based devices”, Strassbourg (F) May 26-30, 2008
19. CECAM Workshop: Which electronic structure method for the study of defects?, Lausanne (CH) June 8-10, 2009
20. CECAM Workshop: Titania for all seasons: multifunctionality of an undercover semiconductor, Bremen (D) September 6-10, 2010
21. 242nd ACS National Meeting, Division of Computers in Chemistry, Denver, (USA) August 28 - September 1, 2011
22. 246th ACS National Meeting, Division of Computers in Chemistry, Indianapolis, (USA) September 8 - 12, 2013
23. CECAM Workshop: Nanostructured ZnO and related materials, Bremen (D) June 23-27 (2014)
24. Defects in reducible oxides, WG4 Meeting of the COST action CM1104, Riga (LA) April 10 - 11, 2014
25. EMRS-2014 Fall Meeting, Symposium A: “Oxide materials for energy harvesting”, Warsaw (PL) September 15-18, 2014.
26. 9th International Conference on Computational Physics, Symposium C5: “Computational Materials Science”, Singapore January 7-11, 2015.
27. 9th International Conference on Computational Physics, Symposium C6: “Advanced Materials Modeling for Energy Applications”, Singapore January 7-11, 2015.
28. Int. Workshop: “Nothing is perfect – the quantum mechanics of defects”, Monte Verita (CH) April 27-29, 2015.
29. GADEST 2015, Bad Staffelstein (D), September 20-25, 2015.
30. 66th Ann. Meeting of the Intern. Soc. of Electrochemistry, S.6 New Progress in Electrochemical Solar Cells, Taipei (TW) Octber 4-10. 2015.
31. IUMRS-ICEM 2016 International Conference on Electronic Materials, Symp. F. Singapore July 4-8, 2016.
32. CECAM-Workshop: Computational insight into photo-induced processes at interfaces. Bremen (D), October 10-14, 2016.
33. Workshop on Computational Semiconductor Physics, Hohhot (PRC) August 21-23, 2017.
34. Transparent Conductive Oxides – Fundamentals and Applications, Leipzig (D) Sept. 18-22, 2017.
Invited talks at Institutions
Sherman Fairchild Laboratory, Lehigh University, Bethlehem, Pa. (USA) 1986, 1988.
IBM Laboratory, Kingston, NY (USA) 1987.
Max-Planck-Institut für Festkörperforschung, Stuttgart, (D) 1990, 1994.
Universität Zürich, Physikalisches Institut, Zürich (CH) 1991.
TU Wien, Inst. für Angewandte Physik, Vienna (Austria) 1993.
L. Berkeley National Laboratory, Berkeley, CA (USA) 1995.
Hokkaido University, Sapporo (JPN) 1996.
Naval Research Laboratory, Washington DC (USA) 1997.
Industrial Microelectronic Center, Stockholm (S) 1997.
University of Linköping, Dept. of Physics & Measurement Technology, Linköping (S) 1997.
GE-Lighting Europe, Budapest (H) 1998.
Case Western Reserve University, Department of Physics, Cleveland, OH (USA) 1999.
University of the Witwatersrand, Department of Physics, Johannesburg (SA) 2000.
Universität Erlangen-Nürnberg, Fachbereich Physik, Erlangen (D) 2000.
F. Schiller Universität Jena, Institut f. Theoret. Physik, Jena (D) 2000.
Technische Universität Dresden, Physikalisches Institut, Dresden (D) 2000.
Universität Hannover, Institut f. Theoret. Chem., Hannover (D) 2001.
University of Oxford, Oxford (UK) 2003.
University of Oslo, Oslo (N) 2006.
Northwestern Polytechnical University, Xi'an (PRC) 2010.
Tsing Hua University, Beijing (PRC) 2010.
National Renewable Energy Laboratory, Boulder (USA) 2011.
Mulliken Center for Theoretical Chemistry, University of Bonn (D) 2012.
University College London, Thomas Young Centre, London (UK) 2014.
Universität Osnabrück, Nano Science Group, Osnabrück (D) 2014.
Universität Stuttgart, 3. Physikalisches Institut, Stuttgart (D) 2015.
Beijing Computational Science Research Center, Materials and Energy Division (PRC) 2017.
Institute of Solid State Physics, CAS (PRC) 2017.
Invited talks in Hungary
ELFT Anyagtudományi Öszi Iskola, Visegrád 1994.
ELFT Fizikus Vándorgyülés, Debrecen 1995.
MTA Szilárdtestfizika Nap, Budapest 1995.
MTA Szilárdtestfizika Nap, 1997.
MTA Anyagtudományi Nap, 1998.
MTA Anyagtudományi Nap, 2002.
