Dr. Sören Geffken

CV

Research Areas

• Optimization
• Identification of Parameters
• Parallel Algorithms
• Efficient Algorithms

Projects

1. Enhancement of WORHP Using Parametric Sensitivity Analysis with Respect to Hessian Regularisation and Constraint Relaxation (WUPS) (01.11.2015 - 31.12.2015)
2. EWOCS: Extension of WORHP to multi- and many-core Architectures (01.11.2014 - 31.01.2015)
3. Adaption of WORHP to Avionics Constraints (01.04.2013 - 31.01.2015)
4. WORHP (since 01.01.2008)

Courses (Selection)complete list

1. Aktuelle Entwicklungen nichlinearer Optimierung (Wintersemester 2016/2017)

1. Übungen Numerik 1 (Wintersemester 2015/2016)
2. Übungen Optimierung Dynamischer Systeme (Sommersemester 2015)
3. Übungen Numerik der hochdimensionalen nichtlinearen Optimierung (Wintersemester 2014/2015)
4. Übungen Echtzeitoptimierung & Echtzeitoptimalsteuerung (Sommersemester 2014)
5. Übungen Computerpraktikum (Wintersemester 2013/2014)

Theses (Selection)complete list

1. Interior Point Methods for Convex Quadratic Programming (Marcel Jacobse)

Publications (Selection)complete list

1. R. Kuhlmann, S. Geffken, C. Büskens.
   WORHP Zen: Parametric Sensitivity Analysis for the Nonlinear Programming Solver WORHP.
   OR2017, 06.09. - 08.09.2017, Berlin, Germany.
   Operations Research Proceedings 2017, N. Kliewer, J. F. Ehmke, R. Borndörfer (Eds.), pp. 649-654, Springer Verlag, 2018.

   DOI: 10.1007/978-3-319-89920-6_86

2. S. Geffken.
   Effizienzsteigerung numerischer Verfahren der nichtlinearen Optimierung.
   Dissertationsschrift, Universität Bremen, 2017.

   online at: Elektronische Bibliothek der Universität Bremen

3. S. Geffken, M. Knauer, C. Büskens.
   Non-linear Optimisation in Space Engineering.
   Mathematics Today, October 2017 53(5):212-216, 2017.
4. S. Geffken, C. Büskens.
   Parametric Sensitivity Analysis within Sequential Quadratic Programming - Post Optimality Analysis of Subproblems.
   5th International Conference on Continuous Optimization (ICCOPT), Tokyo, Japan, 06.08.2016 - 11.08.2016.
   
5. S. Geffken, C. Büskens.
   Worhp Multi-Core Interface, Parallelisation Approaches for an NLP Solver.
   6th International Conference on Astrodynamics Tools and Techniques (ICATT), 14.-17.03.2016, Darmstadt, Germany.