Univ.-Doz. Dipl.-Ing. Dr.

Rudolf Frühwirth

Nikolsdorfer Gasse 18
A-1050 WIEN

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Fax

Email

Projects

• CMS (LHC)
  Track reconstruction in the Inner Tracker, Vertex fitting
  
• Robust and adaptive track and vertex reconstruction (FWF Project P15177)

Research Interests

• Pattern recognition in particle detectors
• Neural networks
• Non-linear, robust, and adaptive estimation
• Modeling of multiple Coulomb scattering and energy loss by mixture models

Selected publications

• Selection of optimal subsets of tracks with a feed-back neural network
  Computer Physics Communications 78 (1993) 23.
• Track fitting with energy loss
  (with D. Stampfer and M. Regler)
  Computer Physics Communications 79 (1994) 157.
• Matching of broken random samples with a recurrent neural network
  Nuclear Instruments and Methods A 365 (1995) 493.
• Track fitting with long-tailed noise: a Bayesian approach
  Computer Physics Communications 85 (1995) 189.
• Filter methods in track and vertex reconstruction
  (with M. Regler and W. Mitaroff)
  International Journal of Modern Physics C 7 (1996) 521.
• Vertex reconstruction and track bundling at the LEP collider using robust algorithms
  (with P. Kubinec, W. Mitaroff and M. Regler)
  Computer Physics Communications 96 (1996) 189.
• Track fitting with non-Gaussian noise
  Computer Physics Communications 100 (1997) 1.
• Global optimization for track finding
  (with M. Diehl, M. Jünger, J. Scherzer)
  Nuclear Instruments and Methods A 389 (1997) 180.
• On the treatment of energy loss in track fitting
  (with S. Frühwirth-Schnatter)
  Computer Physics Communications 110 (1998) 80.
• Recent developments in pattern recognition with applications in high-energy physics
  (with H. Bischof)
  Nuclear Instruments and Methods A 419 (1998) 259.
• Track finding and fitting with the Gaussian-sum filter
  (with A. Strandlie)
  Proceedings of the Conference on Computing in High Energy Physics (CHEP'98), Chicago 1998.
• Track fitting with ambiguities and noise: a study of elastic tracking and non-linear filters
  (with A. Strandlie)
  Computer Physics Communications 120 (1999) 197.
• Particle Tracks fitted on the Riemann sphere
  (with A. Strandlie, J. Wroldsen and B. Lillekjendlie)
  Computer Physics Communications 131 (2000) 95.
• Adaptive multitrack fitting
  (with A. Strandlie)
  Computer Physics Communications 133 (2000) 34.
• Efficient modelling of multiple scattering for minimum ionizing particles in tissue
  (with M. Regler)
  Nuclear Instruments and Methods in Physics Research B 170 (2000) 10.
• On the quantitative modelling of tails and core of multiple scattering by Gaussian mixtures
  (with M. Regler)
  Nuclear Instruments and Methods in Physics Research A 456 (2001) 369.
• Mixture models of multiple scattering: computation and simulation
  (with M. Liendl)
  Computer Physics Communications 141 (2001) 230.
• Error analysis of the track fit on the Riemann sphere
  (with A. Strandlie)
  Nuclear Instruments and Methods A 480 (2002) 734.
• Treatment of multiple scattering with the generalized Riemann sphere track fit
  (with A. Strandlie and J. Wroldsen)
  Nuclear Instruments and Methods A 488 (2002) 332.
• Helix fitting by an extended riemann fit
  (with A. Strandlie and W. Waltenberger)
  Nuclear Instruments and Methods A 490 (2002) 366.
• Estimation of detector alignment parameters using the Kalman filter with annealing
  (with T. Todorov and M. Winkler)
  Journal of Physics G: Nuclear and Particle Physics 29 (2003) 561.
• New developments in vertex reconstruction for CMS
  (with K. Prokofiev, T. Speer, P. Vanlaer and W. Waltenberger)
  Nuclear Instruments and Methods A 502 (2003) 699.
• Recent results on adaptive track and multitrack fitting
  (with A. Strandlie, T. Todorov and M. Winkler)
  Nuclear Instruments and Methods A 502 (2003) 702.
• A review of fast circle and helix fitting
  (with A. Strandlie, W. Waltenberger and J. Wroldsen)
  Nuclear Instruments and Methods A 502 (2003) 705.
• A Gaussian-mixture approximation of the Bethe-Heitler model of electron energy loss by bremsstrahlung
  Computer Physics Communications 154 (2003) 131.
• Sensitivity of robust vertex fitting algorithms
  (with J. D'Hondt, P. Vanlaer and W. Waltenberger)
  IEEE Transactions on Nuclear Science 51 (2004) 2037.
• A Gaussian-sum filter for vertex reconstruction
  (with T. Speer)
  Nuclear Instruments and Methods A 534 (2004) 217.
• Reconstruction of electrons with the Gaussian-sum filter in the CMS tracker at the LHC
  (with W. Adam, A. Strandlie and T. Todorov)
  Journal of Physics G: Nuclear and Particle Physics 31 (2005) N9.
• Vertex reconstruction in CMS
  (with E. Chabanat, J. D'Hondt, N. Estre, K. Prokofiev, T. Speer, P. Vanlaer and W. Waltenberger)
  Nuclear Instruments and Methods A 549 (2005) 188.
• Application of adaptive filters to track finding
  (with A. Strandlie)
  Nuclear Instruments and Methods A 559 (2006) 162.
• Track reconstruction in the CMS tracker
  (with W, Adam, T. Speer, A. Strandlie, T. Todorov, M. Winkler)
  Nuclear Instruments and Methods A 559 (2006) 143.
• A Gaussian-sum filter for vertex reconstruction
  (with T. Speer)
  Computer Physics Communications 174 (2006) 935.
• On a fast, robust estimator of the mode: Comparisons to other robust estimators with applications
  (with D. Bickel)
  Computational Statistics and Data Analysis 50 (2006) 3500.
• Robust vertex fitters
  (with T. Speer, P. Vanlaer, W. Waltenberger)
  Nuclear Instruments and Methods A 566 (2006) 149.
• Reconstruction of charged tracks in the presence of large amounts of background and noise
  (with A. Strandlie)
  Nuclear Instruments and Methods A 566 (2006) 157.
• Discrimination between different types of material in track reconstruction with a Gaussian-sum filter
  (with A. Strandlie)
  IEEE Transactions on Nuclear Science 53 (2006) 3842.
• Auxiliary Mixture Sampling with Applications to Logistic Models
  (with S. Frühwirth-Schnatter)
  Computational Statistics and Data Analysis 51 (2007) 3509.
• The LiC detector toy program
  (with M. Regler and M. Valentan)
  Nuclear Instruments and Methods A 581 (2007) 553.
• Adaptive Vertex Fitting
  (with W. Waltenberger and P. Vanlaer)
  Journal of Physics G: Nuclear and Particle Physics 34 (2007) N1.
• Redescending M-estimators and Deterministic Annealing, with Applications to Robust Regression and Tail Index Estimation
  (with W. Waltenberger)
  Austrian Journal of Statistics 37 Nr. 3-4 (2008) 301.
• Generalization of the Gluckstern formulas I: Higher orders, alternatives and exact results
  (with M. Regler)
  Nuclear Instruments and Methods A 589 (2008) 109.
• Generalization of the Gluckstern formulas II: Multiple scattering and non-zero dip angles
  (with M. Regler)
  Nuclear Instruments and Methods A 606 (2009) 728.
• Improved auxiliary mixture sampling for hierarchical models of non-Gaussian data
  (with S. Frühwirth-Schnatter, L. Held and H. Rue)
  Statistics and Computing 19/4 (2009) 479.
• Data Augmentation and MCMC for Binary and Multinomial Logit Models.
  (with S. Frühwirth-Schnatter)
  In: T. Kneib and G. Tutz (Eds.), Statistical Modelling and Regression Structures,
  Physica Verlag, Heidelberg, 2010.
  
• Track and vertex reconstruction: From classical to adaptive methods.
  (with A. Strandlie)
  Reviews of Modern Physics 82 (2010) 1419.
  
• Estimation of the material budget from tracker data to improve the quality of the track fit.
  (with M. Nadler)
  Nuclear Instruments and Methods A 648 (2011) 246.
• Pattern recognition and reconstruction.
  (with A. Strandlie)
  In: C.W. Fabjan and H. Schopper (Eds.): Elementary Particle, Landolt-Börnstein I21/B, Springer, Berlin-Heidelberg, 2011.
  
• Clustering with position-specific constraints on variance:
  Applying redescending M-estimators to label-free LC-MS data analysis.
  (with D.R, Mani and S. Pyne)
  BMC Bioinformatics 12 (2011) 358.
  
• Mean Field Variational Bayes for Elaborate Distributions.
  (with M. Wand, J.T. Ormerod and S. Padoan)
  Bayesian Analysis 6/4 (2011) 847.
  
• Peelle's Pertinent Puzzle - a fake due to improper analysis
  (with D. Neudecker and H. Leeb)
  Nuclear Science and Engineering 170/1 (2012) 54.
  
• Bayesian Inference in the Multinomial Logit Model
  (with S. Frühwirth-Schnatter)
  Austrian Journal of Statistics 41 Nr. 1 (2012) 27.
  

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