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Information Page of SAS Employee 

Viktor Witkovský, SAS

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Education and Degrees

• 2005, Doc. (docent) in mathematics at the Faculty of Mathematics, Physics and Informatics, Comenius University, Bratislava
• 1997, Independent Scientific Worker (scientific qualification degree - IIa), Slovak Academy of Sciences, Bratislava
• 1993, CSc. (Candidate of Sciences, equivalent to PhD degree) in probability and mathematical statistics, received at the Mathematical Institute of the Slovak Academy of Sciences, Bratislava
• 1989-1992, PhD study, Institute of Measurement Science of the Slovak Academy of Sciences, Bratislava
• 1986, RNDr. (Rerum Naturalis Doctor) in probability and mathematical statistics, Faculty of Mathematics and Physics, Comenius University, Bratislava

Experience

1986 - present, Institute of Measurement Science of the Slovak Academy of Sciences, Bratislava

• 2006 - present, deputy director of the Institute of Measurement Science of the Slovak Academy of Sciences, Bratislava
• 2005 - present, Chair of the Scientific Committee of the Institute of Measurement Science of the Slovak Academy of Sciences, Bratislava
• 1998 - present, Head of the Departme of Theoretical Methods, Institute of Measurement Science of the Slovak Academy of Sciences, Bratislava
• 1998-2006, Scientific secretary of the Institute of Measurement Science of the Slovak Academy of Sciences, Bratislava

Research Interests

• Statistical inference for linear and non-linear mixed models
• Theory and methods for small sample inference
• Methods and algorithms for computing the exact and approximate statistical distributions
• Theory of measurement science and metrology: expression of uncertainty in measurement, interlaboratory comparisons, calibration.
• Data analysis and statistical applications in metrology, biomedicine, and econometrics.

Selected Publications

• WITKOVSKÝ, V. - WIMMER, G. - DUBY, T.: Logarithmic Lambert W × F random variables for the family of chi-squared distributions and their applications. Statistics & Probability Letters 96, 2015, 223-231. (Link to full text).
  
• WITKOVSKÝ, V.: Estimation, testing, and prediction regions of the fixed and random effects by solving the Henderson's mixed model equations. Measurement Science Review 12 (6), 2012, 234-248. (Full text).
• WIMMER, G. - WITKOVSKÝ, V.: Linear comparative calibration with correlated measurements. Kybernetika 43 (4), 2007, 443-452. (Link to full text pdf)
• WITKOVSKÝ, V. - WIMMER, G.: Confidence interval for common mean in interlaboratory comparisons with systematic laboratory biases. Measurement Science Review 7 (Section 1, No. 6), 2007, 64-73. (Link to full text pdf )
• WIMMER, G. - WITKOVSKÝ, V.: Univariate linear calibration via replicated errors-in-variables model. Journal of Statistical Computation and Simulation 77 (3), 2007, 213-227. (Link)
• WITKOVSKÝ, V. - SAVIN, A. - WIMMER, G.: On small sample inference for common mean in heteroscedastic one-way model. Discussiones Mathematicae Probability and Statistics 23 (2), 2003, 123-145. (Abstract)
• WITKOVSKÝ, V.: On the exact computation of the density and of the quantiles of linear combinations of t and F random variables. Journal of Statistical Planning and Inference 94 (1), 2001, 1-13. (Abstract)
• WITKOVSKÝ, V.: Computing the distribution of a linear combination of inverted gamma variables. Kybernetika 37 (1), 2001, 79-90. (Journal)
• WITKOVSKÝ, V.: Exact distribution of positive linear combinations of inverted chi-square random variables with odd degrees of freedom. Statistics & Probability Letters 56 (1), 2002, 45-50. (Abstract)

Publications and Citations

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•  Research Gate