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Gregory von Winckel

Contact

Information

Heinrichstraße 36

Institut f¨

ur Mathematik und

Wissenschafliches Rechnen

Karl-Franzens Universit¨

at

A-8010 Graz, Austria

Voice: + 43 316 380 5166

Fax: + 43 316 380 9815

Skype: gvonwin

E-mail: gregory.von-winckel@uni-graz.at

Homepage: http://www.uni-graz.at/ vonwinck/

Personal data

Date and place of birth: June 10, 1974, Hartford, Connecticut, United States

Marital status: Married

Citizenship: United States

Career

objectives

To be part of an interdisciplinary research and development team which advances the technological

state of the art. An ideal position would make use of both electrical engineering and applied

mathematics expertise.

Current

Research

Focus

PDE-constrained optimization, numerical analysis, control of quantum systems, optimal control with

uncertainty, scientific computing with Python and on graphics processing units.

Technical

Skills

Matlab, Maple, LATEX, C++, Python, Linux, Max OS X, Windows

Work

Experience

Assistant professor

July, 2011 - present

Karl-Franzens Universit¨

at, Graz, Austria

Conducted research in simulation and control of multiparticle systems. Taught graduate courses in

numerical optimization, partial differential equations, and numerical analysis.

Postdoctoral researcher

January, 2007 - June, 2011

Karl-Franzens Universit¨

at, Graz, Austria

Developed fast and efficient methods for quantum control and parallel magnetic resonance image

reconstruction. Taught undergraduate and graduated courses in numerical partial differential equations and Krylov methods. Coauthored proposal for major research grant extension. Coordinated

ENUMATH 2007 scientific conference.

Graduate Intern

July, 2006 - December, 2006

Sandia National Laboratory, Albuquerque, New Mexico, USA

Worked on numerical modeling and analysis of nonlinear gas chromatography.

Graduate Assistant

September 2005 - May, 2006

University of New Mexico, Albuquerque, New Mexico, USA

Responsibilities have been grading and conducting recitation hours for the course Introduction to

Numerical Computing.

Research Assistant

July 2002 - August, 2005

University of New Mexico - Center for High Technology Materials, Albuquerque, New Mexico, USA

Research areas have included molecular beam epitaxy growth of quantum dot infrared photodetectors

and computation of quantum dot electronic states and photoabsorption.

Hardware and Software Engineer

October, 2001 - June, 2002

Thunder Scientific Corp., Albuquerque, New Mexico, USA

Work included design of high-precision humidity calibration systems and performing uncertainty

analysis of humidity measurements.

Software Engineer

May, 2000 - April, 2001

Virtual Ink Corp., Boston, Massachusetts, USA

Wrote infrared and ultrasound data filtering algorithms and diagnostic routines for the mimio whiteboard data capture device.

Teaching Assistant

September, 1998 - January, 2000

University of Connecticut, Storrs, Connecticut, USA

Taught three undergraduate electronics laboratory courses on the use of oscilloscopes, function

generators, amplifier and oscillator circuit design.

Education

Ph.D., Applied Mathematics

University of New Mexico, Albuquerque, New Mexico USA

Dissertation Topic: Optimal Control Techniques in Quantum Mechanics.

Advisor: Evangelos A. Coutsias

December, 2011

Ph.D., Electrical and Computer Engineering, Opto-electronics

April, 2006.

University of New Mexico, Albuquerque, New Mexico USA

Dissertation Topic: Electronic Structure and Photon Absorption in Semiconductor Quantum Dots.

Advisor: Sanjay Krishna

M.S., Electrical and Computer Engineering

B.S.E., Electrical and Systems Engineering

University of Connecticut, Storrs, Connecticut USA

Honors and

Awards

August, 2000

May, 1998

University of New Mexico: Passed Mathematics Ph.D. examination with distinction. February, 2011

University of New Mexico: Passed Engineering Ph.D. examination with distinction. April, 2006

Received NASA Epscor Grant for to work as a research assistant at NASA Langley Research Center,

Hampton, Virginia. Worked on developing a deep-level transient spectroscopy system for characterizing laser-annealed thin film transistors. Spring, 2000

University of Connecticut: graduated Cum Laude, Tau Beta Pi, Eta Kappa Nu, 1996

Courses Taught

Winter

Summer

2011

2011

Winter

Summer

Winter

2010

2010

2009

Summer

2009

Winter

Spring

Fall

Fall

Spring

Fall

2008/09

2006

2005

1999

1999

1998

Numerical Mathematics II

Partial Differential Equations

Optimization II

Numerical Partial Differential Equations

Numerical Mathematics I

Linear Algebra I

Higher Mathematics III

Programming

Introduction to Numerical Mathematics

Interaktives Mathematisches Paket

Introduction to Numerical Computing

Introduction to Numerical Computing

Electrical Engineering Laboratory A

Electrical Engineering Laboratory B

Electrical Engineering Laboratory A

Publications

G. von Winckel and A. Borz`ı, Optimal control of a diatomic molecule, submitted to Numerical

Linear Algebra with Applications, January (2012)

S. Keeling, C. Clason, M. Hinterm¨

uller, F. Knoll, A. Laurain, and G. von Winckel, An image space

approach to Cartesian based parallel MR imaging with total variation regularization, Medical Image

Analysis 16 (2012), 189-200.

A. Borz`ı and G. von Winckel, A POD framework to determine robust controls in PDE optimization,

Computing and Visualization in Science, 14 (2011), 91-103.

C. Clason and G. von Winckel, A general spectral method for the numerical simulation of onedimensional interacting fermions, Computer Physics Communications 183 (2011), 405-417.

G. von Winckel and A. Borz`ı, QUCON: A fast Krylov-Newton code for dipole quantum control

problems, Computer Physics Communications, 181, (2010), 2158-2163.

A. Borz`ı, V. Schulz, C. Schillings, and G. von Winckel, On the treatment of distributed uncertainties

in PDE constrained optimization, GAMM Mitteilungen, 33, (2010), 230-246.

C. Clason, G. von Winckel, On a bilinear optimization problem in parallel magnetic resonance

imaging, Applied Mathematics and Computation, 216, (2010), 1443-1452.

J. Grond, G. von Winckel, J. Schmiedmayer, and U. Hohenester: Optimal control of number squeezing in trapped Bose-Einstein condensates, Physical Review A 80 (5) (2009), 053625. Selected for

republication in Virtual Journal of Atomic Quantum Fluids, 1, (6), (2009)

G. von Winckel, A. Borz`ı, and S. Volkwein, A globalized Newton method for the accurate solution of

a dipole quantum control problem, SIAM Journal of Scientific Computing, 31 (6), (2009), 4176-4203.

A. Borz`ı, and G. von Winckel, Multigrid methods and sparse-grid collocation techniques for parabolic

optimal control problems with random input data., SIAM Journal of Scientific Computing, 31,

(2009), 2172-2192

G. von Winckel, and A. Borz`ı, Computational techniques for a quantum control problem with H 1 cost, Inverse Problems, 24, 034007 (2008)

A.B. Weerasekara, M.B.M. Rinzan, R.C. Jayasinghe, S.G. Matsik, A.G.U. Perera, M. Buchanan,

H.C. Liu, G. von Winckel, A. Stintz, and S. Krishna, Single and Multi Emitter Terahertz Detectors

Using n-Type GaAs/AlGaAs Heterostructures, Sensors, October (2007), 507-510

A.B. Weerasekara, M.B.M. Rinzan, S.G. Matsik, A.G.U. Perera, M. Buchanan, H.C. Liu, G. von

Winckel, A. Stintz and S. Krishna, Si doped GaAs/AlGaAs terahertz detector and phonon effect on

the responsivity, Infrared Physics & Technology, 50, (2-3), 194-198 (2007)

A.B. Weerasekara, M.B.M. Rinzan, S.G. Matsik, A.G.U. Perera, M. Buchanan, H.C. Liu, G. von

Winckel, A. Stintz and S. Krishna, n-Type GaAs/AlGaAs heterostructure detector with a 3.2 THz

threshold frequency, Optics Letters, 32, 10 (2007), 1335-1337

G. von Winckel, S. Krishna, E. A. Coutsias, Spectral Element Modeling of Semiconductor Heterostructures, Mathematical and Computer Modelling, 43 (5-6), (2006), 542-591

A. G. U. Perera, S. G. Matsik, P. V. V. Jayaweera, K. Tennakone, H. C. Liu, M. Buchanan, G. von

Winckel, A. Stintz, and S. Krishna, High operating temperature split-off band infrared detectors,

Applied Physics Letters, 89, 131118, (2006)

M.B.M. Rinzan, A.G.U. Perera, S.G. Matsik, H.C. Liu, M. Buchanan, G. von Winckel, A. Stintz

and S. Krishna, Terahertz absorption in AlGaAs films and detection using heterojunctions, Infrared

Physics and Technology, 47, 1-2, (2005), 188-194

S. G., Matsik, M.B.M. Rinzan, D.G. Esaev, A.G.U. Perera, G. von Winckel. A. Stintz, S. Krishna,

H.C. Liu, M. D. Byloos, T. Oogarah, G.I. Sproule, K. Liu, and M. Buchanan, Effect of doped

substrate on GaAs-AlGaAs interfacial workfunction IR detector response through cavity effect, IEEE

Transactions on Electron Devices, 52,3, (2005), 413-418

A.G.U. Perera, M.B.M. Rinzan, S.G. Matsik, H.C. Liu, M. Buchanan, G. von Winckel, A. Stintz,

and S. Krishna, Terahertz absorption in AlGaAs films and detection using heterojunctions, Infrared

Physics & Technology, 47, (1-2), 188-94 (2005)

G. Ariyawansa, A. G. U. Perera, S. Raghavan, G. von Winckel, A. Stintz, S, Krishna, Effect of well

width on three-color quantum dots-in-a-well infrared detectors, IEEE Photonics Technology Letters,

17, (5), (2005), 1064-1066

Z. G. Hu, M. B. M. Rizan, S. G. Matsik, A. G. U. Perera, G. von Winckel, A. Stintz, S. Krishna,

Optical characterizations of heavily doped p-type Alx Ga1−x As and GaAs epitaxial films at terahertz

frequencies, Journal of Applied Physics, 97, (2005), 93529-1-7

S. Raghavan, D. Forman, P. Hill, N. R. Weisse-Bernstein, G. von Winckel, P. Rotella, S. Krishna, S.

W. Kennerly, J. W. Little, Normal-incidence InAs/In0.15 Ga0.85 As quantum dots-in-a-well detector

operating in the long-wave infrared atmospheric window (8 - 12 µ m), Journal of Applied Physics,

96, (2004), 1036

P. Rotella, G. von Winckel, S. Raghavan, A. Stintz, Y. Jiang, S. Krishna, Study of structural

and optical properties of quantum dots-in-a-well heterostructures, Journal of Vacuum Science and

Technology B, 22, (2004), 1512

M.B.M Rinzan, D.G Esaev, A.G.U Perera, S.G. Matsik, G. von Winckel, A. Stintz, and S. Krishna,

Free carrier absorption in Be-doped epitaxial AlGaAs thin films, Applied Physics Letters, 85, (2004),

5236

A. Amtout, S. Raghavan, P. Rotella, G. von Winckel, A. Stintz, S. Krishna, Theoretical modeling

and experimental characterization of InAs/InGaAs quantum dots in a well detector, Journal of

Applied Physics 96, 3782-6 (2004)

S. Krishna, S. Raghavan, G. von Winckel, A. Stintz, G. Ariyawansa, S. G. Matsik, A.G.U. Perera,

Three-color ( λp1 ∼ 3.8µm, λp2 ∼ 8.5µm, and λp3 ∼ 23.2µm) InAs/InGaAs quantum-dots-in-a-well

detector, Applied Physics Letters, 83, (2003), 2745

S. Krishna, S. Raghavan, G. von Winckel, P. Rotella, A. Stintz, C.P. Morath, D. Le, S.W. Kennerly, Two color InAs/InGaAs dots-in-a-well detector with background-limited performance at 91

K, Applied Physics Letters 82, (2003), 2574

Conferences

G. von Winckel, A globalized Newton method for the optimal control of multiple interacting fermions,

25th IFIP TC Conference on System Modeling and Optimization, Technische Universit¨

at Berlin,

September (2011)

G. von Winckel, A Newton method for the solution of a dipole quantum control problem with uncertain potential, 14th Belgian-French-German Conference on Optimization, Katholische Universit¨

at

L¨

owen, Belgien, September (2009)

G. von Winckel, An inexact Newton method for optimal control of quantum state transitions, Statusseminar des SFB F032, Admont, Austria, November (2008)

G. von Winckel, A function-space BFGS method of optimal control of a quantum system First

Slovak-Austrian Mathematical Congress, Podbanske, Slovakia, September (2007)

G. von Winckel, An L-BFGS Method in H1 for optimal control of a quantum system, ENUMATH

2007, Graz, Austria, September (2007)

G. von Winckel, E. A. Coutsias, S. Krishna, Spectral element solutions of the Schr¨odinger equation

in unbounded domains, International conference for Spectral and High Order Methods, Providence,

Rhode Island, June (2004)

R. P. Prasankumar, R. D. Averitt, A. J. Taylor, G. von Winckel, A. Stintz, S. Krishna, Time-resolved

mid-infrared dynamics of an InAs/InGaAs quantum-dots-in-a-well detector, International Quantum

Electronics Conference, (2004)

G. von Winckel, E. Coutsias and S. Krishna, The Helmholtz eigenproblem in elliptical domains using

spectral tau-Method and conformal mapping, International Conference on Spectral and High Order

Methods, Providence, RI June (2004)

S. Raghavan, D. Forman, P. Hill, G. von Winckel, A. Stintz, S. Krishna, Normal incidence InAs/InGaAs

quantum dots-in-a-well photodetector spanning the 8-12 mu m atmospheric window, 2003 IEEE/LEOS

Annual Meeting Conference Proceedings. pt. 2, 2 921-2 (2003)

A. Amtout, S. Raghavan, P. Rotella, G. von Winckel, A. Stintz, S. Krishna, Theoretical modeling

and experimental characterization of InAs/InGaAs dots in a well detector, 2003 IEEE/LEOS Annual

Meeting Conference Proceedings. pt. 2, 2 923-4 (2003)

S. Raghavan, G. von Winckel, P. Rotella, A. Stintz, S. Krishna, Control of operating wavelength and

linewidth in LWIR InAs/InGaAs dots-in-a-well detectors, 61st Device Research Conference (2003)

S. Krishna, S. Raghavan, G. von Winckel, A. Stintz, G. Ariyawansa, S. G. Matsik, A.G.U. Perera, Three-color InAs/InGaAs quantum dots-in-a-well infrared photodetectors, IEEE International

Symposium on Compound Semiconductors (2003)

G. von Winckel, S. Krishna, theoretical model for bias dependent shift of absorption spectra in quantum well infrared photodetectors, IEEE /LEOS Annual Meeting Conference Proceedings., Glasgow,

U.K. October (2002)

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