English Version

Dr. Marius-Nicolae Popescu





Marius Popescu, Lecturer at the University of Bucharest, Department of Computer Science, since 2004. Ph.D. in 2004 with the thesis "Machine Learning Applied in Natural Language Processing".

My domains of interest are: artificial intelligence, machine learning, computational linguistics, information retrieval, authorship identification, computer vision. My achievements in these fields include: a new method for automatic word sense disambiguation that was awarded third prize at the Senseval 3 evaluation exercises for word sense disambiguation organized by ACL-SIGLEX in 2004; coauthor of the method ENCOPLOT for plagiarism detection which won the first international competition in automatic plagiarism detection in 2009, followed by ranking 4th at PAN@CLEF 2010 and 2nd at PAN@CLEF 2011; a method for authorship analysis which obtained the best results in the author identification task at PAN@CLEF 2012; Co-author of learning systems that ranked on 3rd place in the Native Language Identification Shared Task of the BEA 8 Workshop of NAACL 2013, and on 4th place in the Facial Expression Recognition Challenge of the WREPL Workshop of ICML 2013.
Publications:
  1. Marius Popescu. Training Strategies in Learning to Play Games. Annals of the University of Bucharest, Mathematics - Computer Science, Special Issue, Proceedings of Annual Meeting of Faculty of Mathematics, 28-30 nov. 1996, p. 147-163.
  2. Marius Popescu. Maximum Entropy Models for Dependency Parsing. Annals of the University of Bucharest, COMPUTER SCIENCE, an XLVI, 1997, p. 115-122.
  3. Florentina Hristea, Marius Popescu. A Word Grammar Approach to Syntactic Analysis with Special Reference to Romanian. Annals of the University of Bucharest, Mathematics - Computer Science, Special Issue, Proceedings of the Annual Meeting of the Faculty of Mathematics, 8-9 May 1998, p. 101-111.
  4. Florentina Hristea, Marius Popescu. A Dependency Grammar Approach to Syntactic Analysis with Special Reference to Romanian. In: Building Awareness in Language Technology (eds. Florentina Hristea and Marius Popescu). Editura Universitatii din Bucuresti, 2003, p. 9-16.
  5. Marius Popescu. Dependency Grammar Annotator. In: Building Awareness in Language Technology (eds. Florentina Hristea and Marius Popescu). Editura Universitatii din Bucuresti, 2003, p.17-34.
  6. Marius Popescu. Regularized Least-Squares Classification for Word Sense Disambiguation. Proceedings of The Third International Workshop on the Evaluation of Systems for the Semantic Analysis of Text (Senseval-3). ACL-2004 Workshop. Barcelona: Jul 2004, p. 209-212.
  7. Florentina Hristea, Marius Popescu. On Some Romanian Text Summarization Contributions. Revue Roumaine de Linguistique, VOL. LI, Issues 3-4, 2006, p. 507-509.
  8. Marius Popescu, Liviu P. Dinu Kernel Methods and String Kernels for Authorship Identification: The Federalist Papers Case. Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP-07). Borovets, Bulgaria. 2007.
  9. Marius Popescu, Liviu P. Dinu. Rank Distance as a Stylistic Similarity. Proceedings of the 22nd International Conference on Computational Linguistics (Coling 2008). Manchester, UK. 2008.
  10. Liviu P. Dinu, Marius Popescu. A Multi-Criteria Decision Method Based on Rank Distance. Fundamenta Informaticae. 86(1-2), 2008.
  11. Florentina Hristea, Marius Popescu, Monica Dumitrescu. Performing word sense disambiguation at the border between unsupervised and knowledge-based techniques. Artificial Intelligence Review. 30(1-4), 2008.
  12. Florentina Hristea, Marius Popescu. Adjective Sense Disambiguation at the Border Between Unsupervised and Knowledge-Based Techniques. Fundamenta Informaticae. 91(3-4), 2009.
  13. Liviu P. Dinu, Marius Popescu. A Language Independent Kernel Method for Classifying Texts with Disputed Paternity. Proceedings of the XIII International Conference Applied Stochastic Models and Data Analysis (ASMDA 2009). Vilnius, Lithuania. 2009.
  14. Vivi Nastase, Marius Popescu. What.s in a name? In some languages, grammatical gender. Proceedings of the EMNLP 2009 Conference on Empirical Methods in Natural Language Processing. Singapore. 2009.
  15. Marius Popescu, Liviu P. Dinu. Comparing Statistical Similarity Measures for Stylistic Multivariate Analysis. Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP-09). Borovets, Bulgaria. 2009.
  16. Cristian Grozea, Christian Gehl, Marius Popescu. ENCOPLOT: Pairwise Sequence Matching in Linear Time Applied to Plagiarism Detection. Proceedings of the 3rd PAN Workshop: Uncovering Plagiarism, Authorship and Social Software Misuse. San Sebastian, Spain. 2009.
  17. Liviu P. Dinu, Marius Popescu. Ordinal measures in authorship identification. Proceedings of the 3rd PAN Workshop: Uncovering Plagiarism, Authorship and Social Software Misuse. San Sebastian, Spain. 2009.
  18. Cristian Grozea, Marius Popescu. Who's the Thief? Determining the Direction of Plagiarism. 11th International Conference on Intelligent Text Processing and Computational Linguistics, CICLing-2010: March 21-27, 2010, Iasi, Romania. Proceedings. Lecture Notes in Computer Science, 6008, Springer, 2010.
  19. Cristian Grozea, Marius Popescu. Encoplot - Performance in the Second International Plagiarism Detection Challenge. Lab Report for PAN at CLEF 2010 . CLEF (Notebook Papers/LABs/Workshops) 2010.
  20. Marius Popescu, Florentina Hristea. State of the art versus classical clustering for unsupervised word sense disambiguation. Artificial Intelligence Review. 35(3), 2011.
  21. Cristian Grozea, Marius Popescu. The Encoplot Similarity Measure for Automatic Detection of Plagiarism. - Notebook for PAN at CLEF 2011 . CLEF (Notebook Papers/LABs/Workshops) 2011.
  22. Marius Popescu. Studying Translationese at the Character Level. Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP 2011). Hissar, Bulgaria. 2011.
  23. Marius Popescu, Cristian Grozea. Kernel Methods and String Kernels for Authorship Analysis. CLEF (Online Working Notes/Labs/Workshop) 2012.
  24. Cristian Grozea, Marius Popescu. Encoplot - Tuned for High Recall (also Proposing a New Plagiarism Detection Score). CLEF (Online Working Notes/Labs/Workshop) 2012.
  25. Dinu, Liviu Petrisor, Radu-Tudor Ionescu, Marius Popescu. Local patch dissimilarity for images. Neural Information Processing. Springer Berlin Heidelberg, 2012.
  26. Popescu, Marius, Radu Tudor Ionescu. The Story of the Characters, the DNA and the Native Language. NAACL/HLT 2013 (2013): 270.
  27. Ionescu, Radu Tudor, Marius Popescu, Cristian Grozea. Local Learning to Improve Bag of Visual Words Model for Facial Expression Recognition. ICML 2013 Workshop on Representation Learning, Atlanta, Georgia, USA, 2013.


BOOKS; EDITOR:

Florentina Hristea, Marius Popescu (eds.). Building Awareness in Language Technology. Editura Universitatii din Bucuresti, 2003 (478 pag.).




Prof.dr. Dascalescu Sorin

  


Data si locul nasterii: Nascut la 23 Aprilie 1964 in Ploiesti.

Educatia: A absolvit Facultatea de Matematica, Universitatea Bucuresti in 1988.
Functiile didactice: profesor la Liceul Colorom Codlea intre 1988-1990, asistent intre 1990-1995, lector intre 1995-1999, conferentiar intre 1999-2001 iar din 2001 este Profesor la Facultatea de Matematica si Informatica, Universitatea Bucuresti.
Teza de doctorat: A sustinut doctoratul in 1992 cu teza ''Inele Graduate de Suport Finit''.
Cursuri predate: A tinut cursuri Algebre Hopf, Inele graduate si teorie Clifford, Algebra (I si II), Reprezentari de algebre, Algebre si coalgebre.
Domenii de cercetare: Algebre Hopf, Teoria Inelelor, Grupuri Cuantice.

Este recenzent la Zentralblatt fur Mathematik si Mathematical Reviews.
A obtinut Premiul "Gheorghe Lazar" al Academiei Romane, pentru anul 1996.

Carti si manuale

  1. Hopf algebras: an introduction, Monographs in Pure and Applied Mathematics 235(2000), Marcel Dekker, New York, 401 pag (cu C.Nastasescu si S.Raianu)
  2. Algebre Hopf, Editura Universitatii Bucuresti, 1998, 140 pag. (cu C.Nastasescu si S.Raianu).
  3. Probleme de algebra, Editura Universitatii Bucuresti, 1993, 100 pag., (cu C.Baetica).

Articole stiintifice

  1. Graded T-rings, Comm. Algebra, 17, 1989, p.3033-3042 (cu C.Nastasescu).
  2. The equation xn=a in left cancellative monoids, Rivista di Matematica Pura ed. Appl., Udine, 9, 1991, p.95-115 (cu C.Nastasescu).
  3. Some results on graded rings of finite support, Proc. of the Algebra Conf., Babes-Bolyai University, Faculty of Mathematics and Computer Science Research Seminars no.1, 1992, p.131-136.
  4. A note on groups with the finite embedding property, Proc. of the Int. Conf. on Group Theory, Timisoara, 1992, p.43-45.
  5. Graded semiperfect rings, Bull. de la Soc. Sci. Math. Roumaine, 36, 1992, p.247-255.
  6. Graded T-rings with finite support, Comm. Algebra, 21, 1993, p.3619-3636, (cu A. del Rio).
  7. A Maschke-type theorem for crossed coproducts, Annals of the Ovidius University of Constanta, 2, 1994, p.44-51 (cu S.Caenepeel si S.Raianu).
  8. A note on intermediate normalizing extensions, Bull.of the Austral. Math. Soc., 50, 1994, p.313-316 (cu L. Van Wyk).
  9. A note on graded semilocal rings, Revue Roumaine de Math. Pures et Appl., 40, 1995, p.253-258 (cu M.Beattie si C.Nastasescu).
  10. Graded coalgebras and Morita-Takeuchi contexts, Tsukuba J. Math., 19, 1995, p.395-407 (cu C.Nastasescu, S.Raianu si F. Van Oystaeyen).
  11. Finite Hopf-Galois coextensions, crossed coproducts and duality, J. Algebra 178, 1995, p.400-413 (cu S.Raianu si Y.H. Zhang).
  12. Cosemisimple Hopf algebras coacting on coalgebras, Comm. Algebra, 24, 1996, p.1649-1678 (cu S.Caenepeel si S.Raianu).
  13. Gradings of finite support. Applications to injective objects, J. Pure Appl. Algebra, 107, 1996, p.193-206 (cu C.Nastasescu, A. del Rio si F. Van Oystaeyen).
  14. Categories of modules graded by G-sets. Applications, J. Pure Appl. Algebra 107, 1996, p.129-139 (cu M.Beattie).
  15. Do isomorphic structural matrix rings have isomorphic graphs?, Proc. Amer. Math. Soc., 124, 1996, p.1385-1391 (cu L. Van Wyk).
  16. Crossed coproducts and cleft coextensions, Comm. Algebra 24, 1996, p.1229-1243 (cu G.Militaru si S.Raianu).
  17. Coalgebra deformations of bialgebras by Harrison cocycles, Bull. Belgian Math. Soc. 4(1997), 647-672 (cu S.Caenepeel, G.Militaru si F.Panaite).
  18. Some Remarks on a theorem of H.-J. Schneider, Comm. Algebra 24 (1996), p.4477-4493 (cu S.Raianu si F. Van Oystaeyen).
  19. Comodules graded by G-sets. Applications, Comm. Algebra 25 (1997), p.159-175 (cu C.Nastasescu, B.Torrecillas si F. Van Oystaeyen).
  20. Duality theorems for graded algebras and coalgebras, J. Algebra 192 (1997), p.261-276, (cu C.Nastasescu, B.Torrecillas si F. Van Oystaeyen).
  21. Galois Extensions for Co-Frobenius Hopf Algebras, J. Algebra 198 (1997), p.164-183, (cu M.Beattie si S.Raianu).
  22. Modules Graded By G-Sets. Duality And Finiteness Conditions, J. Algebra 195 (1997), p.624-633, (cu D.Bulacu si L.Grünenfelder).
  23. Comodules graded by G-sets. Applications, Comm. Algebra 25 (1997), p.159-175, (cu C.Nastasescu, B.Torrecillas si F. Van Oystaeyen).
  24. FBN Hopf Module Algebras, Comm. Algebra 25 (1997), p.3521-3529, (cu A.V. Kelarev si B.Torrecillas).
  25. Pointed Hopf algebras of dimension p3, J. Algebra 209 (1998), p.622-634, (cu S.Caenepeel).
  26. Finiteness Conditions, Co-Frobenius Hopf Algebras and Quantum Groups, J. Algebra 200 (1998), p.312-333, (cu M.Beattie, L.Grünenfelder si C.Nastasescu).
  27. On pointed Hopf algebras of dimension 2n, Bull. London Math. Soc. 31 (1999), p.17-24, (cu S.Caenepeel).
  28. On the number of types of finite dimensional Hopf algebras, Inventiones Math. 136 (1999), p.1-7, (cu M.Beattie si L.Grünenfelder).
  29. Classifying pointed Hopf algebras of dimension 16, Comm. Algebra 28 (2000), p.541-568 (cu S.Caenepeel si S.Raianu).
  30. On pointed Hopf algebras of dimension pn, Proc. Amer. Math. Soc. 128 (2000), p.361-367, (cu M.Beattie si L.Grünenfelder).
  31. Yang-Baxter operators arising from (co)algebra structures, Comm. Algebra 27 (1999), p.5833-5845, (cu F.Nichita).
  32. Group gradings on full matrix rings, J. Algebra 220 (1999), p.709-728 (cu B.Ion, C.Nastasescu si J.Rios).
  33. Pointed Hopf algebras with large coradical, Comm. Algebra 27 (1999), p.4821-4826, (cu S.Dascalescu).
  34. Forms of Hopf algebras, Manuscripta Math. 100 (1999), p.35-53, (cu S.Caenepeel si L. Le Bruyn).
  35. A co-Frobenius Hopf algebra with a separable Galois extension is finite, Proc. Amer. Math. Soc. 128(2000), 3201-3203 (cu M.Beattie si S.Raianu).
  36. Constructing pointed Hopf algebras by Ore extensions, J. Algebra 225 (2000), p.743-770, (cu M.Beattie si L.Grünenfelder).
  37. Co-Frobenius Hopf algebras: integrals, Doi-Koppinen modules and injective objects, J. Algebra 220 (1999), p.542-560, (cu C.Nastasescu si B.Torrecillas).
  38. The categories of Yetter-Drinfel'd modules, Doi-Hopf modules and two-sided two-cosided Hopf modules, Applied Categorical Structures 6 (1998), p.223-237, (cu M.Beattie, S.Raianu si F. Van Oystaeyen).
  39. Smash (Co)-products from adjunctions, "Rings, Hopf algebras and Brauer Groups", Marcel Dekker Lecture Notes, 197 (1998), p.103-110, (cu S.Raianu si F. Van Oystaeyen).
  40. Strongly graded coalgebras and graded crossed coproducts, ''Abelian groups, module theory, and topology'', editors D. Dikranjan si L. Salce, Proceedings of the conference in honour of A. Orsatti, Padua, Italy, Marcel Dekker Lecture Notes 201 (1998), p.131-142, (cu C.Nastasescu si S.Raianu).
  41. Finiteness conditions for semigroup graded modules, Rev. Roumaine Math. Pures. Appl 44 (1999), p.37-50 (cu A.V.Kelarev).
  42. On gradings of matrix algebras by cyclic groups, Comm. Algebra 29 (2001), 5013-5021 (cu C.Boboc).
  43. Homological dimension of coalgebras and crossed coproducts, K-Theory 23 (2001), 53-65 (cu C.Nastasescu si B.Torrecillas).
  44. The recovery of the non-diagonal tile in a tiled triangular matrix ring, Indian J. Math. 42 (2000), 167-173 (cu L.Van Wyk).
  45. Semigroup gradings of upper triangular matrix rings, Rev. Roumaine Math. Pures Appl. 46(2001), 611-615 (cu A.Kelarev si C.Nastasescu).
  46. Semigroup gradings of full matrix rings, Comm. Algebra 29 (2001), 5023-5031 (cu A.Kelarev si L.Van Wyk).
  47. Involutory Hopf algebras with non-zero integral, Bull. London Math. Soc. 34 (2002), 33-36 (cu C.Nastasescu si B.Torrecillas).
  48. On gradings of matrix algebras and descent theory, Comm. Algebra 30 (2002), 5901-5920 (cu S.Caenepeel si C.Nastasescu).
  49. Lifting of Nichols algebras of type B2, Israel J. Math. 132 (2002), 1-28 (cu M.Beattie si S.Raianu).
  50. Co-Frobenius Hopf algebras and the coradical filtration, Mathematische Zeitschrift 243 (2003), 145-154 (cu N.Andruskiewitsch).
  51. Group gradings on M2(k), Bull. Australian Math. Soc. 68 (2003), 285-293 (cu R.Khazal si C.Boboc).
  52. Isomorphism of generalized triangular matrix rings and recovery of tiles, International Journal of Mathematics and Math. Sciences 9 (2003), 533-538 (cu R.Khazal si L.Van Wyk).
  53. Hopf algebras of dimension 14, Journal of the London Math. Soc. 69 (2004), 65-78 (cu M.Beattie).
  54. Quantum lines over non-cocommutative Hopf algebras, J. Algebra 273 (2004), 753-779 (cu C.Calinescu, A.Masuoka si C.Menini).
  55. Some examples of integrals for bialgebras, Hopf algebras, 133-141, Lecture Notes in Pure Appl. Math. 237 (2004), Marcel Dekker.
  56. On associative superalgebras of matrices, Rocky Mountain J. Math. 34 (2004), 585-598 (cu P.Jarvis, A.Kelarev si C.Nastasescu).
  57. Symmetric liftings of quantum linear spaces, Mathematica 46 (69) (2004), 141-147.
  58. Periodic rings with finitely generated underlying group, International Journal of Mathematics and Math. Sciences 36 (2004), 1887-1892 (cu R.Khazal).
  59. Symmetric coalgebras, Journal of Algebra 279 (2004), 326-344 (cu F.Castano Iglesias si C.Nastasescu).
  60. Wide Morita contexts, relative injectivity and equivalence results, Journal of Algebra 284 (2005), 705-736 (cu C.Chifan si C.Nastasescu).
  61. On quantum groups at -1, Algebras and Representation Theory 8 (2005), 11-34 (cu N.Andruskiewitsch).
  62. Good gradings on matrix algebras by finite abelian groups of prime index, Bull. Math. Soc. Sc. Math. Roumanie 49 (2006), 5-11 (cu C.Boboc).
  63. Relative regular objects in categories, Applied Categorical Structures 14 (2006), 567-577 (cu C.Nastasescu, A.Tudorache si L.Daus).
  64. On the dimension of the space of integrals for finite dimensional bialgebras, va aparea in Studia Scientiarum Mathematicarum Hungarica.
  65. Group gradings on M3(k), va aparea in Comm. Algebra (cu C.Boboc).



Actualizat: 31 mai 2007



2002 - 2015 -- Facultatea de Matematica si Informatica, Universitatea din Bucuresti
Str. Academiei nr. 14, sector 1, C.P. 010014, Bucuresti, Romania
Tel: (4-021) 314 2863, Fax: (4-021) 315 6990, secretariat fmi.unibuc.ro