Dr. Maria Crăciun
Academic degree:
Ph.D. in Mathematics (2005)
Current position:
Senior researcher (I) at Tiberiu Popoviciu Institute of Numerical Analysis
Current research domains:
 Automatic trend estimation
 time series theory and quantitative finance
 numerical analysis
 approximation of functions by means of linear and positive operators
 umbral calculus
Personal Data
craciun[at]ictp.acad.ro  
Date and place of birth  august 1973, Făgăraş 
Civil status  Married 
Education background:
2005  Ph.D. in Mathematical Analysis BabeşBolyai University, ClujNapoca Thesis: Approximation methods obtained using the Umbral Calculus Scientific advisor: acad. Dimitrie D. Stancu 
19961997  Master Studies at Faculty of Mathematics and Computer Science, “BabeşBolyai” University, ClujNapoca, field Numerical Analysis; 
19911996  Faculty of Sciences, Mathematics – Computer Science section, “Lucian Blaga” University, Sibiu; 
19871991  Highschool “Gheorghe Lazăr”, Sibiu, section mathematicsphysics; 
Working experience:
2016 –  scientific researcher I, “Tiberiu Popoviciu” Institute of Numerical Analysis (ICTP), ClujNapoca, Romanian Academy 
2015 – 2016  scientific researcher II, ICTP 
2005 – 2014  scientific researcher III, ICTP 
1999 – 2005  research assistant, ICTP 
1996 – 1998  teaching assistant at Faculty of Sciences, “Lucian Blaga” University, Sibiu 
Teaching experience:
2010 – 2013  courses and laboratories of mathematics and informatics taught at the Faculty of Pharmacy, “Iuliu Haţieganu” University of Medicine and Pharmacy, ClujNapoca (French and Romanian section) 
1996 – 1998  seminars of mathematics and informatics taught at the Faculty of Sciences, “Lucian Blaga” University, Sibiu 
Conferences and workshops:

Maria Crăciun, Tiberiu Harko, Observational constraints on Weyl geometric gravity from the SPARC galactic rotation curves database, 7th International Conference in Astronomy, Astrophysics, Space and Planetary Sciences, 1012 July 2023, Cluj Napoca, Academic Days 2023

Alexandru Pop, Maria Crăciun, Orbital period variability of U CrB – a new approach, 7th International Conference in Astronomy, Astrophysics, Space and Planetary Sciences, 1012 July 2023, Cluj Napoca, Academic Days 2023

Maria Crăciun, Tiberiu Harko, On some methods of fitting models to observational data, Numerical Analysis, Numerical Modeling, Approximation Theory, Academic Days, November 69 2023, ClujNapoca

Maria Crăciun, Tiberiu Harko, The effects of a random potential on BoseEinstein Condensate dark matter halos, Theory, Observations and Data Processing in Astronomy, Astrophysics, Space and Planetary Sciences, 0608 July 2022 ClujNapoca, 2022

Alexandru Pop, Vlad Turcu, Maria Crăciun,“Digging in the garbage” or SZ Lyncis – a quadruple stellar system? Theory, Observations and Data Processing in Astronomy, Astrophysics, Space and Planetary Sciences, 0608 July 2022 ClujNapoca, 2022

Maria Crăciun, Pop Alexandru, On the analysis and modelling of some time series from astronomy, Numerical Analysis, Numerical Modeling, Approximation Theory, Academic Days, October 2628 2022, ClujNapoca

Alexandru Pop, Maria Crăciun and Mihail Barbosu, Light Travel Time Effect– from Fourier parameters to orbital elements through different approaches, Viewpoints in Astronomy, Astrophysics, Space and Planetary Sciences, International Conference 2829 October 2021, Cluj Academic Days 2021

Maria Crăciun and Alexandru Pop, ESC method as a tool for differential diagnostic of variability phenomena: periodicity versus quasiperiodicity, Simpozion „70 de ani de la infiintarea Institutului de Calcul Tiberiu Popoviciu”, 28 October 2021, Cluj Academic Days 2021

Maria Crăciun, Tiberiu Harko, About the fitting of a dark matter model on the galactic rotation curves data, 16 April 2019, Numerical Analysis, Approximation and Modeling, Academic Days, ClujNapoca

Maria Crăciun, Tiberiu Harko, Galactic rotation curves in BoseEinstein Condensate dark matter models, Recent developments in astronomy, astrophysics, space and planetary sciences, International Conference, 2729 May 2019, ClujNapoca

Alexandru Pop, Maria Crăciun, Vlad Turcu, Detection of a low level period variability in the pulsating star SZ Lyncis, Recent developments in astronomy, astrophysics, space and planetary sciences, International Conference, 2729 May 2019, ClujNapoca

Tiberiu Harko, Maria Crăciun, Shidong Liang, Testing the BoseEinstein dark matter model with galactic rotation curves from the SPARC sample, 2019 International Mini Workshop on Composite Higgs, Dark Matter, Neutrinos, New Physics, GaugeHiggs Unification and Related Topics, Sun Yatsen University (SYSU), Guangzhou, China, 2124 November 2019.
 Alexandru Pop, Maria Crăciun and Călin Vamoş, Deciphering the orbital period variability of U CrB using differential diagnosis, Outlook in Astronomy, Astrophysics, Space and Planetary Sciences, International Conference 1719 May 2018, Cluj Academic Days 2018
 M. Crăciun, C. Vamoş, N. Suciu, Numerical analysis and generation of groundwater concentration time series, (poster), SIAM Conference on Mathematical and Computational Issues in the Geosciences, September 1114, 2017, Erlangen, Germany.
 N. Suciu, C. Vamoş, M. Crăciun, P. Knabner, Time series parameterization of evolution equations for probability density functions of uncertain concentrations transported in groundwater, SIAM Conference on Mathematical and Computational Issues in the Geosciences, September 1114, 2017, Erlangen, Germany.
 M. Crăciun, C. Vamoş, N. Suciu, Modeling and numerical generation of hydrological concentration time series, Zilele Academice, Simpozion “Analiză numerică, aproximare şi modelare”, 14 iunie 2017
 A. Pop, M. Crăciun, C. Vamoş, G. Mocanu, Deciphering the orbital period variability of WW Cygni, Zilele Academice, Symposium “International year of Light 2015Astronomical perspectives”, 21 mai 2015
 M. Crăciun, C. Vamoş, A. Pop, G. Mocanu, Analiza variabilității perioadei orbitale a sistemului binar WW Cygni , Zilele Academice, Simpozion “Metode numerice si de aproximare”, 20 mai 2015
 Călin Vamoş, Maria Crăciun, Algoritm pentru stabilirea existenţei tendinței întro serie de timp cu zgomot, Zilele Academice, Simpozion “Metode numerice si de aproximare”, 20 mai 2015
 M. Crăciun, C. Vamoş, A. Pop, Numerical Detection of Deterministic Components of Noisy Astronomical Time Series, Third International Conference on Numerical Analysis and Approximation Theory, ClujNapoca, September 1720, 2014
 Maria Crăciun, Călin Vamoş, Alexandru Pop, Analiza numerică a proprietăţilor funcţiei de “selfcorrelation” pentru seriile de timp neechidistante, Zilele Academice, 2014,
 Călin Vamoş, Maria Crăciun, Descompunere pe mai multe scări a seriilor de timp complexe, Zilele Academice, 2014,
 Maria Crăciun, Călin Vamoş, Monte Carlo simulations of the nonstationary financial time series, Optimization in Finance – OPTFIN2012 Workshop, Petru Maior University of TârguMures, 47 December 2012
 Maria Crăciun, Călin Vamoş, O metodă automată de estimare a tendinţei dintro serie de timp nestaţionară, Zilele Academice, 2012
 Maria Crăciun, Călin Vamoş, O măsură de asimetrie pentru distribuţii stabile, Zilele Academice, 34 iunie 2010
 Călin Vamoş, Maria Crăciun, Evaluarea numerică a volatilităţii financiare, Simpozion “Metode numerice şi de aproximare”, Zilele Academice 34 iunie 2010, Zilele Academice, 34 iunie 2010
 C. Vamoş, Maria Crăciun, Detrending errors of the estimated parameters of a noise superposed on a nonmonotonic trend, International Workshop on Recent Advances in Time Series Analysis, Protaras, Cyprus 0811 June 2008.
 C. Vamoş, Maria Crăciun, About some problems in time series analysis, International Conference on Applied Mathematics, Baia Mare, 1821 sept. 2008, abstract p. 51.
 C. Vamoş, Maria Crăciun, Detrending errors of the parameters of a noise superposed on a deterministic trend, International Conference ICTP50, Semicentennial of “Tiberiu Popoviciu” Institute of Numerical Analysis, Cluj Napoca, 710 May 2008.
 C. Vamoş, Maria Crăciun, Influence of deterministic trend on the estimated parameters of GARCH(1,1) model, “Applications of Physics in Financial Analysis”, 6th International Conference, 4 – 7 July 2007, Lisbon, Portugal, available online: http://lanl.arxiv.org/abs/0709.1536.
 C. Vamoş, Maria Crăciun, An objective criterion for characterization of a trend in a time series, Simpozion “Interdisciplinaritate în astrofizica observaţională”, 67 iulie 2006.
 Maria Crăciun, Proprietăţi ale unei clase de operatori, Simpozion “Centenar Tiberiu Popoviciu”, 2930 iunie 2006.
 C. Vamoş, Maria Crăciun, Average conditional jump for a white noise superposed on a linear trend, International Conference on Engineering and Mathematics, 911 July, 2007, Bilbao, Spain, p. 5156.
 M. Crăciun, A. Di Bucchianico, On some classes of approximation operators constructed with binomial, Appell and Sheffer sequences, 4th International Conference on Applied Mathematics, 2326 septembrie 2004, Şuior – BaiaMare, abstract p. 12.
 M. Crăciun, On some classes of uniform approximation operators (in Romanian), “Academic Days” Symposia, 34 June 2004, ClujNapoca, Romania.
 M. Crăciun, A. Di Bucchianico, Applications of the umbral calculus to the approximation theory, The 5^{th} Congress of the Romanian mathematicians, 2228 June 2003, Piteşti, Romania.
 A. Di Bucchianico, M. Crăciun, Umbral calculus and approximation operators, “GROSTAT VI”, 1720 February, 2003, Menton, France; “www.dima.unige.it/SMID/grostatvi/dibucchianico.pdf”
 M. Crăciun, Approximation operators constructed by means of Sheffer sequences, 38^{ste} Nederlands Mathematisch Congres, 45 April 2002, Technische Universiteit Eindhoven, Nederlands.
 M. Crăciun, Approximation Operators and Umbral Calculus, “Academic Days” Symposia, 2122 June 2002, ClujNapoca.
Grants:
 collaborator at the Research Grant 2CEEX061196/19.09.2006
 collaborator at the Research Grant with MEC no. ET18 / 2005
 coordinator for the Research Grant with Romanian Academy no. 15/ 2003 with the collaboration of Prof. C. Mustăţa and Prof. A. Di Bucchianico.
 coordinator for the Research Grant with Romanian Academy no. 13/ 2004 with the collaboration of Prof. C. Mustăţa and Prof. A. Di Bucchianico. (continuation)
Membership in professional societies:
Society for Industrial and Applied Mathematics (SIAM)
Other professional activities
 Secretary of the editorial board of “Revue d’Analyse Numérique et de Théorie de l’Approximation” (Romania), 20132016
Research stages
 Technische Universiteit Eindhoven: April 2002; 114 June 2003; 1124 July 2004
Computer experience
 Operating systems: Windows.
 Programming languages: Matlab, C, Pascal.
 Wordprocessing languages: Scientific Work Place, LaTeX.
Languages
 English
 French.
Note: the publications may be consulted as posts, clickable by author (e.g., M. Crăciun), category (either, e.g., (original), (survey), paper, book or mathematical field, e.g., global random walk, time series), tag (year), etc.
The processing of the information is in progress.
Papers
 M. Crăciun, T. Harko, Testing Weyl geometric gravity with the SPARC galactic rotation curves database, Physics of the Dark Universe, 43 (2024), art. no. 101423, https://doi.org/10.1016/j.dark.2024.101423.
 A. Pop, M. Crăciun, M. Bărbosu, On the determination of the orbital elements in the light travel time effect, Romanian Astron. J., 32 (2022) no. 1, pp. 5971.
 M. Crăciun, T. Harko, Testing BoseEinstein condensate dark matter models with the SPARC galactic rotation curves data, The European Physical Journal C, vol. 80 (2020), Article no. 735.
 M. Crăciun, T. Harko, Constraining BoseEinstein condensate dark matter models with the galaxy rotation curves of the SPARC sample, Romanian Astronomical Journal, 29 (2019) no.2, 101118
 M. Crăciun, C. Vamos, N. Suciu, Analysis and generation of groundwater concentration time series, Advances in Water Resources, vol. 111 (2018), pp. 2030. DOI: 10.1016/j.advwatres.2017.10.039, (IF 2016 3.221)(pdf)
 A. Pop, M. Crăciun, G.R. Mocanu, C. Vamoș, Evidence for quasiperiodicity in orbital period modulation of WW Cygni, Astrophysics and Space Science, 362: 76. (2017), DOI: 10.1007/s1050901730574, (2015 Impact factor 1.678)
 C. Vamoş, M. Crăciun, N. Suciu, Automatic algorithm to decompose discrete paths of fractional Brownian motion into selfsimilar intrinsic components, The European Physical Journal B, 88: 250, (2015), pp.10, DOI: 10.1140/epjb/e2015605155. (2013 Impact factor 1.463) (pdf)
 M. Crăciun, C. Vamoş, A. Pop, Detection of low level periodic signals through enhanced selfcorrelation method. The case of ER Vulpeculae, Monthly Notices of the Royal Astronomical Society, 448, 2066–2076 (2015), DOI: 10.1093/mnras/stv108. (2013 Impact factor 5.226) (pdf)
 C. Vamoş, M. Crăciun, Intrinsic superstatistical components of financial time series, The European Physical Journal B 87 (2014): 301, pp. 9, doi: 10.1140/epjb/e201450596y. (2013 Impact factor 1.463) (pdf)
 C. Vamoş, M. Crăciun, Numerical demodulation of a Gaussian white noise modulated in amplitude by a deterministic volatility, The European Physical Journal B 86 (2013): 166, pp. 8 doi: 10.1140/epjb/e201331072x (Impact factor 1.282) (pdf)
 C. Vamoş, M. Crăciun, Separation of components from a scale mixture of Gaussian white noises, Physical Review E, v. 81 (2010) no. 5, article no.: 051125. (Impact Factor 2009: 2.400) (pdf)
 C. Pop, C. Vamoş, M. Crăciun, C. Curuţiu, Is Bucharest Stock Exchange Influenced by the Five Traded Financial Investment Companies?, Proceedings of the IASK International Conference Global Management 2009, Seville, Spain, June 2224, ISBN: 9789899580695, pp. 603613.
 C. Vamoş, M. Crăciun, Serial correlation of detrended time series, Physical Review E, vol. 78 (2008), Issue 3, Article Number: 036707. (Impact Factor 2009: 2.400) (pdf)
 C. Vamoş, M. Crăciun, Influence of deterministic trend on the estimated parameters of GARCH(1,1) model, Creative Math. and Inf., 17 (2008) no. 3, 525531. (pdf)
 C. Vamoş, Ş.M. Şoltuz, Maria Crăciun, Order 1 autoregressive process of finite length, Rev. Anal. Numér. Théor. Approx., no.2 (2007), pp. 201216.
 V. Gupta, T. Shervashidze, M. Crăciun, Rate of approximation for certain Durrmeyer operators, Georgian Mathematical Journal, vol. 13 (2006), no.2, 277284.
 M. Crăciun, On a compound approximation operator of D.D. Stancu type, Rev. Anal. Numér. Théor. Approx., 35 (2006), 3340. (pdf)
 M. Crăciun, On a class of approximation operators, Mathematical Sciences Research Journal, vol 9(11) (2005) 292303.
 M. Crăciun and A. Di Bucchianico, Sheffer sequences, probability distributions and approximation operators, 25 pp, SPOR Report 200504, Department of Mathematics and Computer Science, Technische Universiteit Eindhoven.
 M. Crăciun, On compound operators depending on s parameters, Rev. Anal. Numér. Théor. Approx., vol. 33 (2004), no. 1, pp.5160. (pdf)
 M. Crăciun, Compound operators constructed with binomial and Sheffer sequences, Rev. Anal. Numér. Théor. Approx., vol. 32 (2003), no. 2, 135144. (pdf)
 M. Crăciun, On an approximation operator and its Lipschitz constant, Rev. Anal. Numér. Théor. Approx., vol. 31 (2002), no. 1, 5560. (pdf)
 M. Crăciun, Approximation operators constructed by means of Sheffer sequences, Rev. Anal. Numér. Théor. Approx., vol. 30 (2001), no. 2, 135150.