AG Optimierung

Prof. Dr. Stefan Ruzika

Anschrift

Paul-Ehrlich-Straße
Gebäude: 14
Raum: 457
67663 Kaiserslautern

Postfach: 3049
67653 Kaiserslautern

Kontakt

Tel.: +49 631 205 4423

Fax: +49 631 205 4737

E-Mail: stefan.ruzika@math.rptu.de

Ich leite das Kompetenzzentrum für mathematische Modellierung in MINT-Projekten in der Schule (KOMMS). Besuchen Sie auch die Webseite von KOMMS.

Außerdem bin ich Sprecher des von der Deutschen Forschungsgemeinschaft geförderten Graduiertenkollegs Mathematics of Interdisciplinary Multiobjective Optimization (MIMO), das im Oktober 2024 seine Forschungsarbeit aufnehmen wird. Informationen zum neuen Graduiertenkolleg finden Sie hier.

Aktuelle Lehrveranstaltungen

Im Wintersemester 2024/25 biete ich folgende Vorlesungen und Seminare an:

Ich betreue außerdem Bachelor- und Masterarbeiten. Wenn Sie hieran Interesse haben, melden Sie sich bitte per E-Mail bei mir.

Forschungsinteressen

  • Multikriterielle Optimierung
  • Ganzzahlige und kombinatorische Optimierung
  • Mathematische Modellierung
  • Optimierungsprobleme auf Netzwerken
  • Approximationsalgorithmen

Forschungsprojekte

Ageing Smart

Entscheidungsunterstützung zur Steigerung der Lebensqualität der Generation Baby-Boomer

Weiterlesen
AMPaPro

Approximation von multiparametrischen Optimierungsproblemen

Weiterlesen
GRK 2982: MIMO

Mathematics of Interdisciplinary Multiobjective Optimization

Weiterlesen
MAL-i

Mathematical Adaptive Learningsystems Enhanced by Eye-Tracking

Weiterlesen
SchuMaMoMINT

Schulentwicklung für Mathematische Modellierung in MINT-Fächern

Weiterlesen
WebStuPlan

Instrument zur Darstellung von Studienverläufen und Studierendenberatung

Weiterlesen

Funktionen (Auswahl)

Curriculum Vitae

  • seit 2017: Professor (W3) im Fachbereich Mathematik an der Rheinland-Pfälzischen Technischen Universität Kaiserslautern-Landau (RPTU), ehemals: TU Kaiserslautern
     
  • 2012-2017: Professor für Mathematik (W3), Universität Koblenz-Landau
     
  • 2009-2010: Vertretungsprofessur am Lehrstuhl für Optimierung, Bergische Universität Wuppertal
     
  • 2008-2012: Juniorprofessor für mathematische Optimierung und Anwendungen, TU Kaiserslautern
     
  • 2007: Promotion (Dr.rer.nat.), TU Kaiserslautern
    Thesis: On Multiple Objective Combinatorial Optimization
     
  • 2003-2007: Wissenschaftlicher Mitarbeiter, TU Kaiserslautern
     
  • 2003: Diplom in Mathematik, TU Kaiserslautern
     
  • 2002: Master of Science, Clemson University, South Carolina, USA
     
  • 2001-2002: Studium der Mathematik, Clemson University, South Carolina, USA
     
  • 1998-2003: Studium der Mathematik und Informatik, TU Kaiserslautern

Veröffentlichungen

  • A. Herzel, S. Helfrich, S. Ruzika, C. Thielen
    Approximating biobjective minimization problems using general ordering cones
    Journal of Global Optimization (2023)

  • P. Halffmann, L. E. Schäfer, K. Dächert, K. Klamroth, S. Ruzika
    Exact algorithms for multiobjective linear optimization problems with integer variables: A state of the art survey
    Journal of Multi-Criteria Decision Analysis 29, pp. 341-363 (2022)

  • K. Küfer, K. Miettinen, S. Ruzika, S. Sayin
    Multi-criteria optimization in industry
    OR Spectrum 44, pp. 303-305 (2022)

  • C. Bazgan, S. Ruzika, C. Thielen, D. Vanderpooten
    The power of the weighted sum scalarization for approximating multiobjective optimization problems
    Theory of Computing Systems 66, pp. 395-415 (2022)

  • N. Fröhlich, S. Ruzika
    Interdicting facilities in tree networks
    Top 30, pp. 95-118 (2022)

  • S. Helfrich, A. Herzel, S. Ruzika, C. Thielen
    An Approximation Algorithm for a General Class of Multi-Parametric Optimization Problems
    Journal of Combinatorial Optimization 44, pp. 1459-1494 (2022)

  • M. Bracke, S. Ruzika
    Wie gut ist mein Timing? Modellieren mit realen, selbst erzeugten Daten
    MATHEMATIK 5-10 2021, pp. 38-41 (2021)

  • A. Herzel, S. Ruzika, C. Thielen
    Approximation methods for multiobjective optimization problems: A survey
    INFORMS Journal on Computing 33, pp. 1284-1299 (2021)

  • L. Schneider, R. B. Ferri, S. Ruzika
    On the influence of knowledge about the ideal-typical modelling processes on individuals’ modelling routes
    Quadrante 30, pp. 220-241 (2021)

  • N. Fröhlich, S. Ruzika
    Interdicting facilities in tree networks
    TOP, pp. 1-24 (2021)

  • N. Fröhlich, S. Ruzika
    On the hardness of covering-interdiction problems
    Theoretical Computer Science 871, pp. 1-15 (2021)

  • L. E. Schäfer, T. Dietz, M. Barbati, J. R. Figueira, S. Greco, S. Ruzika
    The binary knapsack problem with qualitative levels
    European Journal of Operational Research (2020)

  • T. Ullmert, S. Ruzika, A. Schöbel
    On the p-hub interdiction problem
    Computers & Operations Research 124, pp. 105056 (2020)

  • T. Dietz, K. Klamroth, K. Kraus, S. Ruzika, L. E. Schäfer, B. Schulze, M. Stiglmayr, M. M. Wiecek
    Introducing multiobjective complex systems
    European Journal of Operational Research 280, pp. 581-596 (2020)

  • L. E. Schäfer, T. Dietz, N. Fröhlich, S. Ruzika, J. R. Figueira
    Shortest paths with ordinal weights
    European Journal of Operational Research 280, pp. 1160-1170 (2020)

  • L. Streib, M. Kattwinkel, H. Heer, S. Ruzika, R. B. Schäfer
    How does habitat connectivity influence the colonization success of a hemimetabolous aquatic insect? - A modeling approach
    Ecological Modelling 416, pp. 108909 (2020)

  • B. Schulze, M. Stiglmayr, L. Paquete, C. M. Fonseca, D. Willems, S. Ruzika
    On the rectangular knapsack problem: approximation of a specific quadratic knapsack problem
    Mathematical Methods of Operations Research, pp. 1-26 (2020)

  • F. Gensheimer, T. Dietz, K. Kraft, S. Ruzika, N. Wehn
    A Reduced-Complexity Projection Algorithm for ADMM-based LP Decoding
    IEEE Transactions on Information Theory (2020)

  • P. Halffmann, T. Dietz, A. Przybylski, S. Ruzika
    An inner approximation method to compute the weight set decomposition of a triobjective mixed-integer problem
    Journal of Global Optimization (2020)

  • A. Herzel, C. Bazgan, S. Ruzika, C. Thielen, D. Vanderpooten
    One-exact approximate Pareto sets
    Journal of Global Optimization, pp. 1-29 (2020)

  • L. M. Russo, T. Dietz, J. R. Figueira, A. P. Francisco, S. Ruzika
    Sparsifying parity-check matrices
    Applied Soft Computing 96, pp. 106601 (2020)

  • H. Heer, L. Streib, R. B. Schäfer, S. Ruzika
    Maximising the clustering coefficient of networks and the effects on habitat network robustness
    Plos one 15, pp. e0240940 (2020)

  • C. Bazgan, A. Herzel, S. Ruzika, C. Thielen, D. Vanderpooten
    An approximation algorithm for a general class of parametric optimization problems
    Journal of Combinatorial Optimization, pp. 1-31 (2020)

  • M. Bracke, C. Gomez-Tutor, J. Kuhn, S. Ruzika
    Unified Education: Medienbildung entlang der Lehrerbildungskette-Maßnahmen im Rahmen der Qualitätsoffensive Lehrerbildung der TU Kaiserslautern
    Mitteilungen der Gesellschaft für Didaktik der Mathematik 45, pp. 33-38 (2019)

  • H. Heer, L. Streib, M. Kattwinkel, R. B. Schäfer, S. Ruzika
    Optimisation Model of Dispersal Simulations on a Dendritic Habitat Network
    Scientific Reports 9, pp. 1-11 (2019)

  • J. R. Figueira, C. M. Fonseca, P. Halffmann, K. Klamroth, L. Paquete, S. Ruzika, B. Schulze, M. Stiglmayr, D. Willems
    Easy to say they are Hard, but Hard to see they are Easy - Towards a Categorization of Tractable Multiobjective Combinatorial Optimization Problems
    Journal of Multi-Criteria Decision Analysis 24, pp. 82-98 (2017)

  • T. Kuhn, S. Ruzika
    A coverage-based Box-Algorithm to compute a representation for optimization problems with three objective functions
    Journal of Global Optimization 67, pp. 581-600 (2017)

  • P. Halffmann, S. Ruzika, C. Thielen, D. Willems
    A General Approximation Method for Bicriteria Minimization Problems
    Theoretical Computer Science 695, pp. 1-15 (2017)

  • A. Giudici, P. Halffmann, S. Ruzika, C. Thielen
    Approximation Schemes For the Parametric Knapsack Problem
    Information Processing Letters 120, pp. 11-15 (2017)

  • K. Klamroth, S. Mostaghim, B. Naujoks, S. Poles, R. Purshouse, G. Rudolph, S. Ruzika, S. Sayin, M. M. Wiecek, X. Yao
    Multiobjective optimization for interwoven systems
    Journal of Multi-Criteria Decision Analysis 24, pp. 71-81 (2017)

  • C. Torchiani, J. Ohst, D. Willems, S. Ruzika
    Shortest Paths with Shortest Detours
    Journal of Optimization Theory and Applications 174, pp. 858-874 (2017)

  • D. H. Biedermann, C. Torchiani, P. M. Kielar, D. Willems, O. Handel, S. Ruzika, A. Borrmann
    A hybrid and multiscale approach to model and simulate mobility in the context of public events
    Transportation Research Procedia 19, pp. 350-363 (2016)

  • S. Göttlich, S. Kühn, J. P. Ohst, S. Ruzika
    Evacuation modeling: a case study on linear and nonlinear network flow models
    EURO journal on computational optimization 4, pp. 219-239 (2016)

  • T. Kuhn, C. M. Fonseca, L. Paquete, S. Ruzika, M. M. Duarte, J. R. Figueira
    Hypervolume subset selection in two dimensions: Formulations and algorithms
    Evolutionary Computation 24, pp. 411-425 (2016)

  • S. Ruzika, C. Torchiani
    Comments on: Static and dynamic source locations in undirected networks
    TOP 23, pp. 655-659 (2015)

  • C. Torchiani, M. J. Seitz, D. Willems, S. Ruzika, G. Köster
    Fahrgastwechselzeiten von Shuttlebussen
    H. TUM-I1517. TU München: Universität Koblenz-Landau 2015 (2015)

  • T. Vincent, F. Seipp, S. Ruzika, A. Przybylski, X. Gandibleux
    Multiple objective branch and bound for mixed 0-1 linear programming: Corrections and improvements for the biobjective case
    Computers & Operations Research 40, pp. 498-509 (2013)

  • A. Borrmann, A. Kneidl, G. Köster, S. Ruzika, M. Thiemann
    Bidirectional coupling of macroscopic and microscopic pedestrian evacuation models
    Safety science 50, pp. 1695-1703 (2012)

  • C. Klamler, U. Pferschy, S. Ruzika
    Committee selection under weight constraints
    Mathematical Social Sciences 64, pp. 48-56 (2012)

  • J. Gorski, K. Klamroth, S. Ruzika
    Generalized multiple objective bottleneck problems
    Operations Research Letters 40, pp. 276-281 (2012)

  • M. Helmling, S. Ruzika, A. Tanatmis
    Mathematical programming decoding of binary linear codes: Theory and algorithms
    IEEE Transactions on Information Theory 58, pp. 4753-4769 (2012)

  • S. Ruzika, M. Thiemann
    Min-Max quickest path problems
    Networks 60, pp. 253-258 (2012)

  • J. Gorski, K. Klamroth, S. Ruzika
    Connectedness of efficient solutions in multiple objective combinatorial optimization
    Journal of Optimization Theory and Applications 150, pp. 475-497 (2011)

  • S. Ruzika, H. Sperber, M. Steiner
    Earliest arrival flows on series-parallel graphs
    Networks 57, pp. 169-173 (2011)

  • S. Göttlich, S. Kühn, J. P. Ohst, S. Ruzika, M. Thiemann
    Evacuation dynamics influenced by spreading hazardous material
    Networks & Heterogeneous Media 6, pp. 443-464 (2011)

  • J. Gorski, S. Ruzika
    On k-max-optimization
    Operations Research Letters 37, pp. 23-26 (2009)

  • M. Ehrgott, S. Ruzika
    Improved epsilon-constraint method for multiobjective programming
    Journal of Optimization Theory and Applications 138, pp. 375 (2008)

  • H. W. Hamacher, C. R. Pedersen, S. Ruzika
    Finding representative systems for discrete bicriterion optimization problems
    Operations Research Letters 35, pp. 336-344 (2007)

  • H. W. Hamacher, C. R. Pedersen, S. Ruzika
    Multiple objective minimum cost flow problems: A review
    European Journal of Operational Research 176, pp. 1404-1422 (2007)

  • H. W. Hamacher, S. Ruzika, S. A. Tjandra
    Algorithms for time-dependent bicriteria shortest path problems
    Discrete optimization 3, pp. 238-254 (2006)

  • S. Ruzika
    An Exact Algorithm for Solving Weight-Constrained Combinatorial Optimization Problems
    Electronic Notes in Discrete Mathematics, pp. 143-144 (2006)

  • S. Ruzika, M. M. Wiecek
    Approximation methods in multiobjective programming
    Journal of optimization theory and applications 126, pp. 473-501 (2005)

  • G. Fadel, Y. Li, S. Konda, M. M. Wiecek, S. Ruzika
    Detecting local convexity on the Pareto surface
    Journal of Multi-Criteria Decision Analysis 11, pp. 45-54 (2002)
  • J. Andersen, M. Baum, C. Dictus, A. Greubel, L. Knippertz, J. Krüger, I. Neumann, B. Priemer, S. Ruzika, J. Schulz, others
    Critical Thinking--Gelegenheit für MINT-Lernen in der Zukunft?
    Die Zukunft des MINT-Lernens--Band 1: Perspektiven auf (digitalen) MINT-Unterricht und Lehrkräftebildung, Springer Berlin Heidelberg Berlin, Heidelberg, pp. 43-57 (2022)

  • S. Becker, L. Knippertz, J. Kuhn, L. Kuntz, S. Ruzika
    Blickdatenanalyse bei der Interpretation linearer Graphen im mathematischen und physikalischen Kontext
    Die Zukunft des MINT-Lernens--Band 1: Perspektiven auf (digitalen) MINT-Unterricht und Lehrkräftebildung, Springer Berlin Heidelberg Berlin, Heidelberg, pp. 181-192 (2022)

  • K. Kennel, S. Becker, P. Klein, S. Küchemann, J. Kuhn, S. Ruzika
    Blickbewegungen beim grafischen Ableiten--Lassen sich Fehler durch Eye-Tracking-Daten vorhersagen und elaborieren?
    Eye-Tracking in der Mathematik-und Naturwissenschaftsdidaktik: Forschung und Praxis, Springer, pp. 125-143 (2022)

  • S. Küchemann, N. Cullmann, S. Kovac, S. Becker, P. Klein, K. Kennel, S. Ruzika, J. Kuhn
    Blickverhalten beim Lernen und Problemlösen mit Graphen--Ein Literaturüberblick bis 2020
    Eye-Tracking in der Mathematik-und Naturwissenschaftsdidaktik, Springer, pp. 177-192 (2022)

  • L. E. Schäfer, S. Ruzika
    On Variants of the Single-criterion and Multiobjective Near-Shortest Paths Problem
    Multikriterielle Optimierung und Entscheidungsunterstützung, Springer Fachmedien Wiesbaden, pp. 17-30 (2019)

  • K. Küfer, S. Ruzika, P. Halffmann
    Multikriterielle Optimierung und Entscheidungsunterstützung: Tagungsband GOR Entscheidungstheorie und-praxis 2018
    Springer-Verlag (2019)

  • S. Ruzika, V. Klöckner, S. Gecks
    Wie man einen Testsieger kürt
    Digitale Werkzeuge, Simulationen und mathematisches Modellieren, Springer, pp. 229-252 (2018)

  • D. Willems, O. Zehner, S. Ruzika
    On a Technique for Finding Running Tracks of Specific Length in a Road Network
    Operations Research Proceedings 2017, Springer, pp. 333-338 (2018)

  • S. Ruzika, H. Siller, M. Bracke
    Evakuierungsszenarien in Modellierungswochen - ein interessantes und spannendes Thema für den Mathematikunterricht
    Neue Materialien für einen realitätsbezogenen Mathematikunterricht 3, Springer, pp. 181-190 (2017)

  • S. Ruzika, H. Siller, M. Bracke
    Evakuierungsszenarien in Modellierungswochen--ein interessantes und spannendes Thema für den Mathematikunterricht
    Neue Materialien für einen realitätsbezogenen Mathematikunterricht 3, Springer, pp. 181-190 (2017)

  • S. Göttlich, S. Kühn, J. P. Ohst, S. Ruzika
    Influence of Spreading Hazardous Material in Macroscopic Evacuation Dynamics: A Proof of Concept
    Pedestrian and Evacuation Dynamics 2012, Springer, pp. 275-282 (2014)

  • A. Kneidl, M. Thiemann, A. Borrmann, S. Ruzika, H. W. Hamacher, G. Köster, E. Rank
    Bidirectional coupling of macroscopic and microscopic approaches for pedestrian behavior prediction
    Pedestrian and Evacuation Dynamics, Springer, pp. 459-470 (2011)

  • K. Leiner, S. Ruzika
    Quickest cluster flow problems on tree networks
    Network Optimization, Springer, pp. 243-255 (2011)

  • S. Ruzika, M. Thiemann
    Reliable and restricted quickest path problems
    Network Optimization, Springer, pp. 309-314 (2011)

  • H. W. Hamacher, S. Heller, W. Klein, G. Köster, S. Ruzika
    A sandwich approach for evacuation time bounds
    Pedestrian and Evacuation Dynamics, Springer, pp. 503-513 (2011)

  • H. W. Hamacher, K. Leiner, S. Ruzika
    Quickest cluster flow problems
    Pedestrian and Evacuation Dynamics, Springer, pp. 327-336 (2011)

  • H. W. Hamacher, S. Ruzika
    Flach spielen, hoch gewinnen: Fußball und Wissenschaft
    Shaker (2010)

  • S. Ruzika, H. W. Hamacher
    A survey on multiple objective minimum spanning tree problems
    Algorithmics of Large and Complex Networks, Springer, pp. 104-116 (2009)

  • S. Ruzika
    On multiple objective combinatorial optimization
    Verlag Dr. Hut (2007)
  • L. Knippertz, S. Becker, J. Kuhn, S. Ruzika
    Gaze pattern analysis to reveal student difficulties in interpreting kinematic graphs
    Twelfth Congress of the European Society of Research in Mathematics Education (CERME12) (2022)

  • A. Greubel, H. Siller, S. Ruzika, L. Knippertz
    Teaching Mathematical Modeling with Computing Technology: Presentation of a Course based on Evacuations
    Proceedings of the 17th Workshop in Primary and Secondary Computing Education, pp. 1-6 (2022)

  • L. Albert, N. Fröhlich, N. Hausbrand, S. Henninger, T. Maurer, S. Ruzika
    Human-biometeorologisch angepasste Routenführungen durch mathematische Optimierung
    Mobility, Knowledge and Innovation Hubs in Urban and Regional Development. Proceedings of REAL CORP 2022, 27th International Conference on Urban Development, Regional Planning and Information Society, pp. 427-435 (2022)

  • M. Stiewing, T. Weber, K. Mangels, S. Ruzika, N. Fröhlich, N. Hausbrandt
    „Black Box Babyboomer”--Was kommt auf Kommunen zu? Decision Support System mit Hilfe mathematischer Erreichbarkeitsmodellierung medizinischer Versorgungsstandorte
    Mobility, Knowledge and Innovation Hubs in Urban and Regional Development. Proceedings of REAL CORP 2022, 27th International Conference on Urban Development, Regional Planning and Information Society, pp. 131-141 (2022)

  • L. Schneider, R. B. Ferri, S. Ruzika
    How knowledge about ideal-typical modelling processes affects phase transitions in individual modelling routes
    Twelfth Congress of the European Society for Research in Mathematics Education (2022)

  • L. E. Schäfer, T. Dietz, M. V. Natale, S. Ruzika, S. O. Krumke, C. M. Fonseca
    The Bicriterion Maximum Flow Network Interdiction Problem in s-t-Planar Graphs
    Operations Research Proceedings 2019, pp. 133-139 (2020)

  • P. Schiewe, A. Schöbel, S. Ruzika
    Kosten oder Reisezeit? Bikriterielle Optimierung der integrierten Fahr- und Umlaufplanung
    Preprint Heureka'21 (2020)

  • C. Bazgan, A. Herzel, S. Ruzika, C. Thielen, D. Vanderpooten
    An FPTAS for a General Class of Parametric Optimization Problems
    International Computing and Combinatorics Conference, pp. 25-37 (2019)

  • S. Ruzika, L. Schneider
    On the role of multicriteria decision support in mathematical modelling
    Eleventh Congress of the European Society for Research in Mathematics Education 24 (2019)

  • F. Gensheimer, T. Dietz, S. Ruzika, K. Kraft, N. Wehn
    Improved Maximum-Likelihood Decoding Using Sparse Parity-Check Matrices
    2018 25th International Conference on Telecommunications (ICT), pp. 236-240 (2018)

  • F. Gensheimer, T. Dietz, S. Ruzika, K. Kraft, N. Wehn
    A Low-Complexity Projection Algorithm for ADMM-Based LP Decoding
    2018 IEEE 10th International Symposium on Turbo Codes & Iterative Information Processing (ISTC), pp. 1-5 (2018)

  • D. H. Biedermann, C. Torchiani, P. M. Kielar, D. Willems, O. Handel, S. Ruzika, A. Borrmann
    A hybrid and multiscale approach to model and simulate mobility in the context of public events
    Transportation Research Procedia (19), pp. 350-363 (2016)

  • F. Gensheimer, S. Ruzika, S. Scholl, N. Wehn
    ADMM versus simplex algorithm for LP decoding
    9th International Symposium on Turbo Codes and Iterative Information Processing (ISTC), 2016, pp. 211-215 (2016)

  • F. Gensheimer, S. Ruzika, S. Scholl, N. Wehn
    A simplex algorithm for LP decoding hardware
    Personal, Indoor, and Mobile Radio Communication (PIMRC), 2014 IEEE 25th Annual International Symposium on, pp. 790-794 (2014)

  • M. Helmling, E. Rosnes, S. Ruzika, S. Scholl
    Efficient maximum-likelihood decoding of linear block codes on binary memoryless channels
    Information Theory (ISIT), 2014 IEEE International Symposium on, pp. 2589-2593 (2014)

  • S. Scholl, F. Kienle, M. Helmling, S. Ruzika
    Integer programming as a tool for analysis of channel codes
    Systems, Communication and Coding (SCC), Proceedings of 2013 9th International ITG Conference on, pp. 1-6 (2013)

  • M. Helmling, S. Ruzika
    Towards combinatorial LP turbo decoding
    2013 IEEE International Symposium on Information Theory Proceedings (ISIT), pp. 1491-1495 (2013)

  • S. Scholl, F. Kienle, M. Helmling, S. Ruzika
    ML vs. BP decoding of binary and non-binary LDPC codes
    Turbo Codes and Iterative Information Processing (ISTC), 2012 7th International Symposium on, pp. 71-75 (2012)

  • A. Tanatmis, S. Ruzika, F. Kienle
    A Lagrangian relaxation based decoding algorithm for LTE turbo codes
    Turbo Codes and Iterative Information Processing (ISTC), 2010 6th International Symposium on, pp. 369-373 (2010)

  • M. Punekar, F. Kienle, N. Wehn, A. Tanatmis, S. Ruzika, H. W. Hamacher
    Calculating the minimum distance of linear block codes via integer programming
    Turbo Codes and Iterative Information Processing (ISTC), 2010 6th International Symposium on, pp. 329-333 (2010)

  • Y. Ji, F. Seipp, A. Borrmann, S. Ruzika, E. Rank
    Mathematical modeling of earthwork optimization problems
    Proc. of the International Conference on Computing in Civil and Building Engineering (ICCCBE) (2010)

  • A. Tanatmis, S. Ruzika, M. Punekar, F. Kienle
    Numerical comparison of IP formulations as ML decoders
    Communications (ICC), 2010 IEEE International Conference on, pp. 1-5 (2010)

  • C. Klamler, U. Pferschy, S. Ruzika
    Committee selection with a weight constraint based on lexicographic rankings of individuals
    International Conference on Algorithmic DecisionTheory, pp. 50-61 (2009)

  • A. Tanatmis, S. Ruzika, H. W. Hamacher, M. Punekar, F. Kienle, N. Wehn
    Valid inequalities for binary linear codes
    IEEE International Symposium on Information Theory, 2009. ISIT 2009., pp. 2216-2220 (2009)

  • A. Tanatmis, S. Ruzika, H. W. Hamacher, M. Punekar, F. Kienle, N. Wehn
    A separation algorithm for improved LP-decoding of linear block codes
    5th International Symposium on Turbo Codes and Related Topics, 2008, pp. 37-42 (2008)

  • S. Baumgartner, E. O. Gavriliouk, H. W. Hamacher, T. Meyer, S. Ruzika
    Hub location's tool box: Integer programming, heuristics, aggregation, multiobjective optimization
    Extended Abstract, ISOLDE X Meeting, Sevilla, Spain (2005)