Background & Research Interests

Oscar Chinellato studied computer science  at the Federal Institute of Technology in Zurich (ETH ) and did his diploma thesis (M.Sc.) in the Institute of Theoretical Computer Science . In his diploma project, which was carried out in the group of Emo Welzl , he investigated several algorithms for the shortest vector problem and derived complexity bounds for a parametrised family of reduction based methods. Afterwards he went on to obtain a Ph.D. from the ETH, where he was working as an assistant of Prof. Walter Gander  in the Institute of Computational Science . His advisor was Prof. Peter Arbenz  and the focus of the thesis rested on the modelling and computing of resonance modes of lossy resonator cavities.

Oscar Chinellato's research focuses on approximate solution methods for partial differential equations, iterative solvers for eigenvalue problems and linear systems of equations, numerical analysis and high performance computing. In particular this entails

• investigating resonator cavities by using high order (specialised) finite element models
• adapting, enhancing and developing eigenvalue solvers (and required components) for large sparse generalised (complex-symmetric) eigenvalue problems
• investigating on linear system solvers and preconditioners apt for shifted system matrices
• developing numerically accurate schemes for various purposes, e.g. (dense) matrix transformations, matrix factorisations, quadrature schemes generation, orthogonal polynomial applications, etc.
• reconstructing curves and surfaces from error afflicted measurement data with subsequent estimation of involved uncertainties
• parallelization of computationally intensive codes with MPI and OpenMP

Selected Publications

• (with C. Lauer, O. Dier, M.-C. Amann) Carrier distribution in the active region of vertical-cavity lasers with electrical apertures submitted to Semicond. Sci. Technol., 2007
• (with F. Römer, L. Balet, L. H. Li, N. Le Thomas, R. Houdré, M. Francardi, A. Gerardino, A. Fiore, B. Witzigmann) Investigation of the Optical Farfield of Photonic Crystal Microcavities to appear in Proceedings of SPIE Photonics West (OPTO 2007), 2007
• (with P. Arbenz) On solving complex-symmetric eigenvalue problems arising in the design of axisymmetric VCSEL devices Appl. Numer. Math. (accepted), 2007
• (with P. Arbenz, M. Gutknecht, M. Sala) Software for Numerical Linear Algebra ETH Zurich, Lecture Notes , July 2006
• (with F. Römer, P. Arbenz, B. Witzigmann) Investigation of the Purcell Effect in Photonic Crystal Cavities with a 3D Finite Element Maxwell Solver submitted to J. Opt. Quantum Electron., 2006
• (with F. Römer, L. Balet, A. Fiore, B. Witzigmann) Modelling Photonic Crystal Microcavities with a 3D FEM Maxwell Solver to appear in Procs. of Intl. Workshop on Phys. Photonic Crystals Metamaterials, June 2006
• The Complex-Symmetric Jacobi-Davidson Algorithm and its Application to the Computation of some Resonance Frequencies of Anisotropic Lossy Axisymmetric Cavities Ph.D. thesis No. 16243 , ETH Zurich, 2005
• (with P. Stuedi, G. Alonso) Connectivity in the presence of shadowing in 802.11 ad hoc networks IEEE Wireless Communications and Networking Conference, March 2005
• (with P. Arbenz, M. Streiff, A. Witzig) Computation of Optical Modes in Axisymmetric Open Cavity Resonators Future Generation Computer Systems, October 2005
• Stabilized Linear Modification Algorithms Technical Report 468, Institute of Computational Science, ETH Zurich, January 2005
• (with P. Stuedi, G. Alonso) Connectivity in the presence of Shadowing in 802.11 Ad Hoc Networks Technical Report 455, Pervasive Computing, ETH Zurich, August 2004
• (with E. Achermann, Oliver Bröker) Including Covariances In Calibration To Obtain Better Measurement Uncertainty Estimates SISC Special Issue on Uncertainty Quantification, March 2004
• (with O. Bröker, R. Geus) Using Python for Large Scale Linear Algebra Future Generation Computer Systems, Special Issue on Linear Algebra for High Performance Computational Science, December 2003
• (with P. Arbenz, M. Streiff, A. Witzig) Computation of Optical Modes inside Axisymmetric Open Cavity Resonators Technical Report 402, Institute of Computational Science, ETH Zurich, June 2003
• (with E. Achermann) Estimating Measurement Uncertainty Technical Report 346, Institute of Scientific Computing, ETH Zurich, July 2000
• (with P. Arbenz, O. Bröker, W. Gander, R. Geus, R. Strebel) A Comparison of Numerical Implementations of the Eigenstate Expansion Method for Quantum Molecular Dynamics Simulations Technical Report 333, Institute ofScientific Computing, ETH Zurich, January 2000

Recent Talks

• Computing Eigenvalues of Electromagnetic Resonator Cavities Applied Mathematics Colloquium at MIT, Boston, USA, September 2006
• Computing Eigenvalues of Electromagnetic Resonator Cavities Scientific Computing Colloquium at UC Davis, Davis, USA, September 2006
• About the Computation of some Resonance Frequencies of Anisotropic Lossy Axisymmetric Cavities MAFELAP '06 at Brunel University, Uxbridge, UK, June 2006
• The Complex-Symmetric Jacobi-Davidson Algorithm - Its Application to the Computation of some Resonance Frequencies of Anisotropic Lossy Axisymmetric Cavities Scientific Computing Seminar at Berkeley Labs, Berkeley, USA, March 2006
• The Complex-Symmetric Jacobi-Davidson Algorithm - Its Application to the Computation of some Resonance Frequencies of Anisotropic Lossy Axisymmetric Cavities Scientific Computing Seminar at Stanford University, Stanford, March 2006
• Computing Optical Lasing Modes of Axisymmetric VCSEL Devices JobSIS summer school, Binn, Switzerland, September 2004
• Various Topics in Parallel Computing - Three Standard Problems SNF Scopes Project, Ohrid, Macedonia, September 2003
• Accurate Computation of FE Matrices with axisymmetric domains SNF Scopes Project, Zürich, Switzerland, September 2002
• Estimating Measurement Uncertainty Seminar at National Institute of Standards and Technology (NIST), Gaithersburg, USA, June 2002

Awards & Honors

• Winner of an ETH Medal for an outstanding Ph.D. thesis
• Co-Winner of the SIAM 100-Digit Challenge

Supervised Theses

• Stian Flage Johnsen, Treatment of Curvilinear Elements in Connection with the Vector Wave Equation over Axisymmetric Domains (Part II), Semester thesis, Summer 2006
• Adrian Egli, GPS Based Distance Estimation, Master thesis, Winter 2005
• Sabine Emch, Parallel 3D VCSEL Simulation, Master thesis, Fall 2005
• Raphael Meyer, Treatment of Curvilinear Elements in Connection with the Vector Wave Equation over Axisymmetric Domains (Part I), Semester thesis, Fall 2005

Teaching

• Complex Analysis for Engineers Summer Term 2007, TU München
• Numerical Analysis for Civil and Geodetic Engineers Winter Term 2006/2007, TU München
• Software for Numerical Linear Algebra Summer Term 2006, ETH Zurich
• Software for Numerical Linear Algebra Summer Term 2005, ETH Zurich
• Wissenschaftliches Rechnen Summer Term 2005, ETH Zurich
• Wissenschaftliches Rechnen Summer Term 2004, ETH Zurich
• Software for Numerical Linear Algebra Summer Term 2004, ETH Zurich
• Wissenschaftliches Rechnen Summer Term 2003, ETH Zurich
• Software for Numerical Linear Algebra Summer Term 2003, ETH Zurich
• Wissenschaftliches Rechnen Summer Term 2002, ETH Zurich
• Parallel Numerical Computing Summer Term 2002, ETH Zurich
• Numeric and Symbolic Computation Winter Term 2001/02, ETH Zurich
• Parallel Numerical Computing Summer Term 2001, ETH Zurich
• Numeric and Symbolic Computation Winter Term 2000/01, ETH Zurich
• Least Squares Problems Winter Term 2000/01, ETH Zurich
• Wissenschaftliches Rechnen Kern Winter Term 2000/01, ETH Zurich
• Least Squares Problems Winter Term 1999/2000, ETH Zurich
• Wissenschaftliches Rechnen Kern Winter Term 1999/2000, ETH Zurich
• Digital Design Techniques Winter Term 1999/2000, ZbW St.Gallen
• Introductory/Advanced courses in CS Summer Term 1999, Kantonsschule Heerbrugg
• Digital Design Techniques Winter Term 1998/99, ZbW St.Gallen
• Digital Design Techniques Winter Term 1997/98, ZbW St.Gallen