Stefan Ruzika

Publication Activity (10 Years)

Years Active: 2006-2024
Publications (10 Years): 50

Top Topics

Optimization Problems

Top Venues

J. Glob. Optim.

Eur. J. Oper. Res.

Publications

Nils Hausbrandt, Oliver Bachtler, Stefan Ruzika, Luca E. Schäfer
Parametric matroid interdiction. Discret. Optim. 51 (2024)
Kathrin Kennel, Stefan Ruzika
Real-time Prediction of Students' Math Difficulties using Raw Data from Eye Tracking and Neural Networks. Proc. ACM Hum. Comput. Interact. 8 (ETRA) (2024)
Steffen Steinert, Lars Krupp, Karina E. Avila, Anke S. Janssen, Verena Ruf, David Dzsotjan, Christian de Schryver, Jakob Karolus, Stefan Ruzika, Karen Joisten, Paul Lukowicz, Jochen Kuhn, Norbert Wehn, Stefan Küchemann
Lessons Learned from Designing an Open-Source Automated Feedback System for STEM Education. CoRR (2024)
Lena Leiß, Till Heller, Luca E. Schäfer, Manuel Streicher, Stefan Ruzika
p-median location interdiction on trees. CoRR (2023)
Lynn Knippertz, Anna Münz, Stefan Ruzika
Automated Detection of Geometric Structures in Gaze Data. ETRA (2023)
Stephan Helfrich, Arne Herzel, Stefan Ruzika, Clemens Thielen
Using Scalarizations for the Approximation of Multiobjective Optimization Problems: Towards a General Theory. CoRR (2023)
Stephan Helfrich, Tyler A. Perini, Pascal Halffmann, Natashia Boland, Stefan Ruzika
Analysis of the weighted Tchebycheff weight set decomposition for multiobjective discrete optimization problems. J. Glob. Optim. 86 (2) (2023)
Arne Herzel, Stephan Helfrich, Stefan Ruzika, Clemens Thielen
Approximating biobjective minimization problems using general ordering cones. J. Glob. Optim. 86 (2) (2023)
Cristina Bazgan, Arne Herzel, Stefan Ruzika, Clemens Thielen, Daniel Vanderpooten
Approximating Multiobjective Optimization Problems: How exact can you be? CoRR (2023)
Stephan Helfrich, Arne Herzel, Stefan Ruzika, Clemens Thielen
An approximation algorithm for a general class of multi-parametric optimization problems. J. Comb. Optim. 44 (3) (2022)
Cristina Bazgan, Stefan Ruzika, Clemens Thielen, Daniel Vanderpooten
The Power of the Weighted Sum Scalarization for Approximating Multiobjective Optimization Problems. Theory Comput. Syst. 66 (1) (2022)
André Greubel, Hans-Stefan Siller, Stefan Ruzika, Lynn Knippertz
Teaching Mathematical Modeling with Computing Technology: Presentation of a Course based on Evacuations. WiPSCE (2022)
Philipp Herrmann, Anna Meyer, Stefan Ruzika, Luca E. Schäfer, Fabian von der Warth
A machine learning based algorithm selection method to solve the minimum cost flow problem. CoRR (2022)
Cristina Bazgan, Arne Herzel, Stefan Ruzika, Clemens Thielen, Daniel Vanderpooten
An approximation algorithm for a general class of parametric optimization problems. J. Comb. Optim. 43 (5) (2022)
Karl-Heinz Küfer, Kaisa Miettinen, Stefan Ruzika, Serpil Sayin
Multi-criteria optimization in industry. OR Spectr. 44 (2) (2022)
Arne Herzel, Stephan Helfrich, Stefan Ruzika, Clemens Thielen
Approximating Biobjective Minimization Problems Using General Ordering Cones. CoRR (2021)
Stephan Helfrich, Arne Herzel, Stefan Ruzika, Clemens Thielen
An Approximation Algorithm for a General Class of Multi-Parametric Optimization Problems. CoRR (2021)
Arne Herzel, Cristina Bazgan, Stefan Ruzika, Clemens Thielen, Daniel Vanderpooten
One-exact approximate Pareto sets. J. Glob. Optim. 80 (1) (2021)
Nicolas Fröhlich, Stefan Ruzika
On the hardness of covering-interdiction problems. Theor. Comput. Sci. 871 (2021)
Arne Herzel, Stefan Ruzika, Clemens Thielen
Approximation Methods for Multiobjective Optimization Problems: A Survey. INFORMS J. Comput. 33 (4) (2021)
Luca E. Schäfer, Tobias Dietz, Maria Barbati, José Rui Figueira, Salvatore Greco, Stefan Ruzika
The binary knapsack problem with qualitative levels. Eur. J. Oper. Res. 289 (2) (2021)
Luís M. S. Russo, Tobias Dietz, José Rui Figueira, Alexandre P. Francisco, Stefan Ruzika
Sparsifying parity-check matrices. Appl. Soft Comput. 96 (2020)
Thomas Ullmert, Stefan Ruzika, Anita Schöbel
-hub interdiction problem. Comput. Oper. Res. 124 (2020)
Simon Busan, Luca E. Schäfer, Stefan Ruzika
The two player shortest path network interdiction problem. CoRR (2020)
Pascal Halffmann, Tobias Dietz, Anthony Przybylski, Stefan Ruzika
An inner approximation method to compute the weight set decomposition of a triobjective mixed-integer problem. J. Glob. Optim. 77 (4) (2020)
Luca E. Schäfer, Stefan Ruzika, Sven O. Krumke, Carlos M. Fonseca
On the Bicriterion Maximum Flow Network Interdiction Problem. CoRR (2020)
Luca E. Schäfer, Tobias Dietz, Maria Barbati, José Rui Figueira, Salvatore Greco, Stefan Ruzika
The {0, 1}-knapsack problem with qualitative levels. CoRR (2020)
Luca E. Schäfer, Tobias Dietz, Nicolas Fröhlich, Stefan Ruzika, José Rui Figueira
Shortest paths with ordinal weights. Eur. J. Oper. Res. 280 (3) (2020)
Luís M. S. Russo, Tobias Dietz, José Rui Figueira, Alexandre P. Francisco, Stefan Ruzika
Sparsifying Parity-Check Matrices. CoRR (2020)
Tobias Dietz, Kathrin Klamroth, Konstantin Kraus, Stefan Ruzika, Luca E. Schäfer, Britta Schulze, Michael Stiglmayr, Margaret M. Wiecek
Introducing multiobjective complex systems. Eur. J. Oper. Res. 280 (2) (2020)
Britta Schulze, Michael Stiglmayr, Luís Paquete, Carlos M. Fonseca, David Willems, Stefan Ruzika
On the rectangular knapsack problem: approximation of a specific quadratic knapsack problem. Math. Methods Oper. Res. 92 (1) (2020)
Florian Gensheimer, Tobias Dietz, Kira Kraft, Stefan Ruzika, Norbert Wehn
A Reduced-Complexity Projection Algorithm for ADMM-Based LP Decoding. IEEE Trans. Inf. Theory 66 (8) (2020)
Arne Herzel, Cristina Bazgan, Stefan Ruzika, Clemens Thielen, Daniel Vanderpooten
One-Exact Approximate Pareto Sets. CoRR (2019)
Florian Gensheimer, Tobias Dietz, Kira Kraft, Stefan Ruzika, Norbert Wehn
A Reduced-Complexity Projection Algorithm for ADMM-based LP Decoding. CoRR (2019)
Luca E. Schäfer, Tobias Dietz, Marco V. Natale, Stefan Ruzika, Sven O. Krumke, Carlos M. Fonseca
-Planar Graphs. OR (2019)
Cristina Bazgan, Stefan Ruzika, Clemens Thielen, Daniel Vanderpooten
The Power of the Weighted Sum Scalarization for Approximating Multiobjective Optimization Problems. CoRR (2019)
Luca E. Schäfer, Andrea Maier, Stefan Ruzika
On the Universal Near-Shortest Simple Paths Problem. CoRR (2019)
Cristina Bazgan, Arne Herzel, Stefan Ruzika, Clemens Thielen, Daniel Vanderpooten
An FPTAS for a General Class of Parametric Optimization Problems. COCOON (2019)
Florian Gensheimer, Tobias Dietz, Stefan Ruzika, Kira Kraft, Norbert Wehn
A Low-Complexity Projection Algorithm for ADMM-Based LP Decoding. ISTC (2018)
Florian Gensheimer, Tobias Dietz, Stefan Ruzika, Kira Kraft, Norbert Wehn
Improved Maximum-Likelihood Decoding Using Sparse Parity-Check Matrices. ICT (2018)
Luca E. Schäfer, Tobias Dietz, Nicolas Fröhlich, Stefan Ruzika, José Rui Figueira
Shortest Paths with Ordinal Weights. CoRR (2018)
Pascal Halffmann, Stefan Ruzika, Clemens Thielen, David Willems
A general approximation method for bicriteria minimization problems. Theor. Comput. Sci. 695 (2017)
Tobias Kuhn, Stefan Ruzika
A coverage-based Box-Algorithm to compute a representation for optimization problems with three objective functions. J. Glob. Optim. 67 (3) (2017)
David Willems, Oliver Zehner, Stefan Ruzika
On a Technique for Finding Running Tracks of Specific Length in a Road Network. OR (2017)
Carolin Torchiani, Jan Ohst, David Willems, Stefan Ruzika
Shortest Paths with Shortest Detours - A Biobjective Routing Problem. J. Optim. Theory Appl. 174 (3) (2017)
Pascal Halffmann, Stefan Ruzika, Clemens Thielen, David Willems
A General Approximation Method for Bicriteria Minimization Problems. CoRR (2017)
Alberto Giudici, Pascal Halffmann, Stefan Ruzika, Clemens Thielen
Approximation schemes for the parametric knapsack problem. Inf. Process. Lett. 120 (2017)
Simone Göttlich, Sebastian Kühn, Jan Peter Ohst, Stefan Ruzika
Evacuation modeling: a case study on linear and nonlinear network flow models. EURO J. Comput. Optim. 4 (3-4) (2016)
Tobias Kuhn, Carlos M. Fonseca, Luís Paquete, Stefan Ruzika, Miguel Duarte, José Rui Figueira
Hypervolume Subset Selection in Two Dimensions: Formulations and Algorithms. Evol. Comput. 24 (3) (2016)
Florian Gensheimer, Stefan Ruzika, Stefan Scholl, Norbert Wehn
ADMM versus simplex algorithm for LP decoding. ISTC (2016)
Michael Helmling, Eirik Rosnes, Stefan Ruzika, Stefan Scholl
Efficient Maximum-Likelihood Decoding of Linear Block Codes on Binary Memoryless Channels. CoRR (2014)
Michael Helmling, Eirik Rosnes, Stefan Ruzika, Stefan Scholl
Efficient maximum-likelihood decoding of linear block codes on binary memoryless channels. ISIT (2014)
Florian Gensheimer, Stefan Ruzika, Stefan Scholl, Norbert Wehn
A simplex algorithm for LP decoding hardware. PIMRC (2014)
Michael Helmling, Stefan Ruzika
Towards An Exact Combinatorial Algorithm for LP Decoding of Turbo Codes CoRR (2013)
Michael Helmling, Stefan Ruzika
Towards combinatorial LP turbo decoding. ISIT (2013)
Thomas Vincent, Florian Seipp, Stefan Ruzika, Anthony Przybylski, Xavier Gandibleux
Multiple objective branch and bound for mixed 0-1 linear programming: Corrections and improvements for the biobjective case. Comput. Oper. Res. 40 (1) (2013)
Michael Helmling, Stefan Ruzika, Akin Tanatmis
Mathematical Programming Decoding of Binary Linear Codes: Theory and Algorithms. IEEE Trans. Inf. Theory 58 (7) (2012)
Christian Klamler, Ulrich Pferschy, Stefan Ruzika
Committee selection under weight constraints. Math. Soc. Sci. 64 (1) (2012)
Stefan Ruzika, Markus Thiemann
Min-Max quickest path problems. Networks 60 (4) (2012)
Stefan Scholl, Frank Kienle, Michael Helmling, Stefan Ruzika
ML vs. BP decoding of binary and non-binary LDPC codes. ISTC (2012)
Jochen Gorski, Kathrin Klamroth, Stefan Ruzika
Generalized multiple objective bottleneck problems. Oper. Res. Lett. 40 (4) (2012)
Simone Göttlich, Sebastian Kühn, Jan Peter Ohst, Stefan Ruzika, Markus Thiemann
Evacuation dynamics influenced by spreading hazardous material. Networks Heterog. Media 6 (3) (2011)
Michael Helmling, Stefan Ruzika, Akin Tanatmis
Mathematical Programming Decoding of Binary Linear Codes: Theory and Algorithm CoRR (2011)
Jochen Gorski, Kathrin Klamroth, Stefan Ruzika
Connectedness of Efficient Solutions in Multiple Objective Combinatorial Optimization. J. Optim. Theory Appl. 150 (3) (2011)
Stefan Ruzika, Markus Thiemann
Reliable and Restricted Quickest Path Problems. INOC (2011)
Kathrin Leiner, Stefan Ruzika
Quickest Cluster Flow Problems on Tree Networks. INOC (2011)
Stefan Ruzika, Heike Sperber, Mechthild Steiner
Earliest arrival flows on series-parallel graphs. Networks 57 (2) (2011)
Akin Tanatmis, Stefan Ruzika, Horst W. Hamacher, Mayur Punekar, Frank Kienle, Norbert Wehn
A separation algorithm for improved LP-decoding of linear block codes. IEEE Trans. Inf. Theory 56 (7) (2010)
Akin Tanatmis, Stefan Ruzika, Mayur Punekar, Frank Kienle
Numerical Comparison of IP Formulations as ML Decoders. ICC (2010)
Jochen Gorski, Stefan Ruzika
On k-max-optimization. Oper. Res. Lett. 37 (1) (2009)
Christian Klamler, Ulrich Pferschy, Stefan Ruzika
Committee Selection with a Weight Constraint Based on Lexicographic Rankings of Individuals. ADT (2009)
Stefan Ruzika, Akin Tanatmis, Frank Kienle, Horst W. Hamacher, Norbert Wehn, Mayur Punekar
Valid inequalities for binary linear codes. ISIT (2009)
Stefan Ruzika, Horst W. Hamacher
A Survey on Multiple Objective Minimum Spanning Tree Problems. Algorithmics of Large and Complex Networks (2009)
Akin Tanatmis, Stefan Ruzika, Horst W. Hamacher, Mayur Punekar, Frank Kienle, Norbert Wehn
A Separation Algorithm for Improved LP-Decoding of Linear Block Codes CoRR (2008)
Horst W. Hamacher, Christian Roed Pedersen, Stefan Ruzika
Finding representative systems for discrete bicriterion optimization problems. Oper. Res. Lett. 35 (3) (2007)
Horst W. Hamacher, Christian Roed Pedersen, Stefan Ruzika
Multiple objective minimum cost flow problems: A review. Eur. J. Oper. Res. 176 (3) (2007)
Horst W. Hamacher, Stefan Ruzika, Stevanus A. Tjandra
Algorithms for time-dependent bicriteria shortest path problems. Discret. Optim. 3 (3) (2006)
Stefan Ruzika
An Exact Algorithm for Solving Weight-Constrained Combinatorial Optimization Problems. Electron. Notes Discret. Math. 25 (2006)