Deutsch Intern
Chair of Computer Science I - Algorithms and Complexity

Johannes Zink, M.Sc.

Johannes Zink

Lehrstuhl für Informatik I
Universität Würzburg
Am Hubland
97074 Würzburg
Deutschland
Building: M4
Room: 1.007

  • Theoretical and applied graph drawing
  • Algorithmic problems and their complexity

  • May 2023: Defense of my dissertation with the title Algorithms for Drawing Graphs and Polylines with Straight-Line Segments
  • Since 2018: Research assistant and PhD student at Chair of Computer Science I, University of Würzburg
  • 2015–2017: Master studies in computer science at the University of Würzburg
  • 2012–2015: Bachelor studies in computer science at the University of Würzburg

  • 2023: 1st place in the manual category of the Graph Drawing Live Challenge at the 31st International Symposium on Graph Drawing and Network Visualization (GD'23) in Palermo, together with Tim Hegemann and Florentina Voboril
  • 2022: 2nd place in the manual category of the Graph Drawing Live Challenge at the 30th International Symposium on Graph Drawing and Network Visualization (GD'22) in Tokyo, together with Felix Klesen
  • 2020: 1st place in the manual category of the Graph Drawing Live Challenge at the 28th International Symposium on Graph Drawing and Network Visualization (GD'20) in Vancouver (online), together with Jonathan Klawitter
  • 2018: 1st place in the manual category of the Graph Drawing Live Challenge at the 26th International Symposium on Graph Drawing and Network Visualization (GD'18) in Barcelona, together with Myroslav Kryven
  • 2015–2017: Deutschlandstipendium (“Germany-scholarship”)
  • 2016: Prize by the Institute of Computer Science, University of Würzburg for excellent academic achievements with an outstanding bachelor thesis (sponsored by denkbares GmbH)

  • Joshua Geis: Upward-Planar Drawings of Outerpaths with Three Slopes (Bachelor Thesis, in German), 2022
    [pdf]

  • Vasil Alistarov: Computing Tangles Using a SAT Solver (Master Project), 2022
    [pdf]

  • Jonas Barth: Clear Drawing of Literary Networks Using the Sugiyama Framework (Bachelor Thesis, in German), 2022
    [pdf]

  • Florian Mittelstädt: About Coloring of Generalized Interval Graphs (Master Thesis, in German), 2022
    [pdf]

  • Lukas Brückner: Orthogonal Drawing as a Coloring Problem in Perfect Graphs (Bachelor Thesis, in German), 2021
    [pdf]

  • Dominique Bau: Algorithm Engineering for a Geometric Set Cover Problem (Master Thesis, in German), 2021
    [pdf]

  • Julian Walter: A Variant of Sugiyama's Algorithm for Undirected Graphs with Port Constraints (Master Thesis, in German), 2020
    [pdf], [slides]

  • Julian Walter: Partial Zooming in Large Network Graphs (Master Project, in German), 2019
    [pdf], [slides]

  • Chris Rettner: Flipped Bitonic st-Orderings of Upward Plane Graphs (Bachelor Thesis), 2019
    [pdf]

2024[ to top ]
  • Simultaneous Drawing of Layered Trees. Julia Katheder, Stephen G. Kobourov, Axel Kuckuk, Maximilian Pfister, and Johannes Zink. In Proc. 18th International Conference and Workshops on Algorithms and Computation (WALCOM’24), pp. 47–61. Springer, 2024.
  • Morphing Graph Drawings in the Presence of Point Obstacles. Oksana Firman, Tim Hegemann, Boris Klemz, Felix Klesen, Marie Diana Sieper, Alexander Wolff, and Johannes Zink. In Proc. 49th International Conference on Current Trends in Theory and Practice of Computer Science (SOFSEM’24), pp. 240–254. Springer, 2024.
  • Outerplanar and Forest Storyplans. Jir’i}} Fiala, Oksana Firman, Giuseppe Liotta, Alexander Wolff, and Johannes Zink. In Proc. 49th International Conference on Current Trends in Theory and Practice of Computer Science (SOFSEM’24), pp. 211–225. Springer, 2024.
  • Constrained and Ordered Level Planarity Parameterized by the Number of Levels. Václav Blavz}}ej, Boris Klemz, Felix Klesen, Marie Diana Sieper, Alexander Wolff, and Johannes Zink. In Proc. 40th International Symposium on Computational Geometry (SoCG’24). Schloss Dagstuhl~-- Leibniz-Zentrum für Informatik, 2024.
    to appear
2023[ to top ]
  • The Complexity of Finding Tangles. Oksana Firman, Philipp Kindermann, Boris Klemz, Alexander Ravsky, Alexander Wolff, and Johannes Zink. In Proc. 48th International Conference on Current Trends in Theory and Practice of Computer Science (SOFSEM’23), of Lecture Notes in Computer Science, L. Gasieniec (ed.), pp. 3–17. Springer, 2023.
  • Optimal Polyline Simplification under the Local Fréchet Distance in (Near-)Quadratic Time. Peter Schäfer, Sabine Storandt, and Johannes Zink. In Proc. 35th Canadian Conference on Computational Geometry (CCCG’23), pp. 225–238. 2023.
  • Tree Drawings with Columns. Jonathan Klawitter and Johannes Zink. In Proc. 31st International Symposium on Graph Drawing and Network Visualization (GD’23), pp. 195–210. Springer, 2023.
  • Coloring and Recognizing Mixed Interval Graphs. Grzegorz Gutowski, Konstanty Junosza-Szaniawski, Felix Klesen, Pawel}} Rz\ka}}{.z}}ewski, Alexander Wolff, and Johannes Zink. In Proc. 34th International Symposium on Algorithms and Computation (ISAAC’23), pp. 36:1–36:14. Schloss Dagstuhl -- Leibniz-Zentrum für Informatik, 2023.
  • Upward Planar Drawings with Three and More Slopes. Jonathan Klawitter and Johannes Zink. Journal of Graph Algorithms and Applications, 27(2), pp. 49–70. 2023.
2022[ to top ]
  • Layered Drawing of Undirected Graphs with Generalized Port Constraints. Johannes Zink, Julian Walter, Joachim Baumeister, and Alexander Wolff. Computational Geometry: Theory and Applications, 105--106, p. 101886. 2022.
  • Polyline Simplification under the Local Fréchet Distance has Subcubic Complexity. Sabine Storandt and Johannes Zink. In Proc. 38th Europ. Workshop Comput. Geom. (EuroCG’22), pp. 18:1–7. 2022.
  • Universal Lower Bounds on the Segment Number of Some Classes of Planar Graphs. Jonathan Klawitter, Boris Klemz, Felix Klesen, Stephen Kobourov, Myroslav Kryven, Alexander Wolff, and Johannes Zink. In Proc. 38th Europ. Workshop Comput. Geom. (EuroCG’22), pp. 53:1–6. 2022.
  • Coloring Mixed and Directional Interval Graphs. Grzegorz Gutowski, Florian Mittelstädt, Ignaz Rutter, Joachim Spoerhase, Alexander Wolff, and Johannes Zink. In Proc. 30th International Symposium on Graph Drawing and Network Visualization (GD’22), P. Angelini, R. von Hanxleden (eds.). Springer, 2022.
  • The Segment Number: Algorithms and Universal Lower Bounds for Some Classes of Planar Graphs. Ina Goeßmann, Jonathan Klawitter, Boris Klemz, Felix Klesen, Stephen G. Kobourov, Myroslav Kryven, Alexander Wolff, and Johannes Zink. In Proc. 48th Int. Workshop on Graph-Theoretic Concepts in Computer Science (WG’22), M. Bekos, M. Kaufmann (eds.), p. 16 pages. Springer-Verlag, 2022.
2021[ to top ]
  • Consistent Simplification of Polyline Tree Bundles. Yannick Bosch, Peter Schäfer, Joachim Spoerhase, Sabine Storandt, and Johannes Zink. In Proc. 27th International Computing and Combinatorics Conference (COCOON’21), C.-Y. Chen, W.-K. Hon, L.-J. Hung, C.-W. Lee (eds.). 2021.
    to appear
  • Robust Gateway Placement for Scalable LoRaWAN. Frank Loh, Dominique Bau, Johannes Zink, Alexander Wolff, and Tobias Hoßfeld. In Proc. 13th IFIP Wireless and Mobile Networking Conference (WMNC’21), pp. 71–78. IEEE, 2021.
  • Upward Planar Drawings with Three and More Slopes. Jonathan Klawitter and Johannes Zink. In Proc. 29th International Symposium on Graph Drawing and Network Visualization (GD’21), of Lecture Notes in Computer Science, H. Purchase, I. Rutter (eds.). Springer, 2021.
  • Upward Planar Drawings with Three Slopes. Jonathan Klawitter and Johannes Zink. In Proc. 37th Europ. Workshop Comput. Geom. (EuroCG’21). 2021.
2020[ to top ]
  • Erratum: Fast and Simple Horizontal Coordinate Assignment. Ulrik Brandes, Julian Walter, and Johannes Zink. CoRR, abs/2008.01252. 2020.
  • Complexity of Scheduling Few Types of Jobs on Related and Unrelated Machines. Martin Koutecký and Johannes Zink. In Proc. 31st International Symposium on Algorithms and Computation (ISAAC’20), of LIPIcs. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020.
  • Layered Drawing of Undirected Graphs with Generalized Port Constraints. Julian Walter, Johannes Zink, Joachim Baumeister, and Alexander Wolff. In Proc. 28th International Symposium on Graph Drawing and Network Visualization (GD’20), of Lecture Notes in Computer Science, D. Auber, P. Valtr (eds.). Springer-Verlag, 2020.
  • The Complexity of Finding Tangles. Oksana Firman, Stefan Felsner, Philipp Kindermann, Alexander Ravsky, Alexander Wolff, and Johannes Zink. In Proc. 36th Europ. Workshop Comput. Geom. (EuroCG’20). 2020.
  • Simplification of Polyline Bundles. Joachim Spoerhase, Sabine Storandt, and Johannes Zink. In Proc. 17th Scandinavian Symposium and Workshops on Algorithm Theory (SWAT’20), Vol. 162 of LIPIcs, S. Albers (ed.), pp. 35:1–35:20. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020.
  • Recognizing Stick Graphs with and without Length Constraints. Steven Chaplick, Philipp Kindermann, Andre Löffler, Florian Thiele, Alexander Wolff, Alexander Zaft, and Johannes Zink. Journal of Graph Algorithms and Applications, 24(4), pp. 657–681. 2020.
2019[ to top ]
  • Stick Graphs with Length Constraints. Steven Chaplick, Philipp Kindermann, Andre Löffler, Florian Thiele, Alexander Wolff, Alexander Zaft, and Johannes Zink. In Proc. 27th International Symposium on Graph Drawing and Network Visualization (GD’19), of Lecture Notes in Computer Science, D. Archambault, C. D. Tóth (eds.). Springer-Verlag, 2019.
  • Computing Height-Optimal Tangles Faster. Oksana Firman, Philipp Kindermann, Alexander Ravsky, Alexander Wolff, and Johannes Zink. In Proc. 27th International Symposium on Graph Drawing and Network Visualization (GD’19), of Lecture Notes in Computer Science, D. Archambault, C. D. Tóth (eds.). Springer-Verlag, 2019.
  • Compact Drawings of 1-Planar Graphs with Right-Angle Crossings and Few Bends. Steven Chaplick, Fabian Lipp, Alexander Wolff, and Johannes Zink. Computational Geometry: Theory and Applications, 84, pp. 50–68. 2019.
  • Simplification of Polyline Bundles. Joachim Spoerhase, Sabine Storandt, and Johannes Zink. In Proc. 35th Europ. Workshop Comput. Geom. (EuroCG’19). 2019.
  • Computing Optimal Tangles Faster. Oksana Firman, Philipp Kindermann, Alexander Ravsky, Alexander Wolff, and Johannes Zink. In Proc. 35th Europ. Workshop Comput. Geom. (EuroCG’19). 2019.
2018[ to top ]
  • Compact Drawings of 1-Planar Graphs with Right-Angle Crossings and Few Bends. Steven Chaplick, Fabian Lipp, Alexander Wolff, and Johannes Zink. In Proc. 26th International Symposium on Graph Drawing and Network Visualization (GD’18), of Lecture Notes in Computer Science, T. Biedl, A. Kerren (eds.). Springer-Verlag, 2018.
  • 1-Bend RAC Drawings of NIC-Planar Graphs in Quadratic Area. Steven Chaplick, Fabian Lipp, Alexander Wolff, and Johannes Zink. In Proc. 34th Europ. Workshop Comput. Geom. (EuroCG’18), M. Korman, W. Mulzer (eds.), pp. 28:1–6. 2018.
  • Planar Steiner Orientation is NP-complete. Moritz Beck, Johannes Blum, Myroslav Kryven, Andre Löffler, and Johannes Zink. In Proc. 10th Int. Colloquium on Graph Theory and Combinatorics (ICGT’18). 2018.
2017[ to top ]
  • 1-Planar RAC Drawings with Bends. Johannes Zink. 2017.
2016[ to top ]
  • Faster Force-Directed Graph Drawing with the Well-Separated Pair Decomposition. Fabian Lipp, Alexander Wolff, and Johannes Zink. Algorithms, 9(3), p. article 53, 17 pages. 2016.
2015[ to top ]
  • Faster Force-Directed Graph Drawing with the Well-Separated Pair Decomposition. Fabian Lipp, Alexander Wolff, and Johannes Zink. In Proc. 23rd International Symposium on Graph Drawing and Network Visualization (GD’15), Vol. 9411 of Lecture Notes in Computer Science, E. Di Giacomo, A. Lubiw (eds.), pp. 52–59. Springer, 2015.
  • Beschleunigung von kräftebasierten Graphzeichenalgorithmen mittels wohlseparierten Paardekompositionen (Engl. Speeding up Force-Directed Graph Drawing Algorithms Using Well-Separated Pair Decompositions). Johannes Zink. 2015.
    In German