Fachbereichsleiter für Algorithmen- und Softwareentwicklung (ASE)

Head, Algorithm and Software Development Group

Institut für Hochenergiephysik der

Österreichischen Akademie der Wissenschaften

Institute for High Energy Physics of the

Austrian Academy of Sciences

Nikolsdorfer Gasse 18

A-1050 WIEN

**Phone**

**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.*

**Personal data**