Promotion
Approximation Algorithms for Geometrical Distance Problems that are not Solvable Exactly
- Betreuer
- Professor Dr. Jan Vahrenhold
- Promotionsfach
- Informatik
- Abschlussgrad
- Dr. rer. nat.
- Verleihender Fachbereich
- Fachbereich 10 – Mathematik und Informatik
Vita
Akademische Ausbildung
- Diplomstudiengang Informatik an der TU Dortmund
Beruflicher Werdegang
- Wissenschaftlicher Mitarbeiter am Institut für Informatik der WWU Münster (Arbeitsgruppe Effiziente Algorithmen und Algorithm Engineering)
- Wissenschaftlicher Mitarbeiter am Lehrstuhl 11 der Fakultät für Informatik der TU Dortmund
Publikationen
- . . ‘Worst-Case Optimal Squares Packing into Disks.’ In Proceedings of the 37th International Symposium on Computational Geometry (SoCG). [akzeptiert / in Druck (unveröffentlicht)]
- . . ‘Particle-Based Assembly Using Precise Global Control.’ In Proceedings of 17th International Symposium on Algorithms and Data Structures (WADS). [akzeptiert / in Druck (unveröffentlicht)]
- . . ‘Hard Instances of the Minimum-Weight Triangulation Problem.’ In Proceedings of the 36th European Workshop on Computational Geometry (EuroCG).
- . . ‘Connected Coordinated Motion Planning.’ In Proceedings of the 36th European Workshop on Computational Geometry (Euro{CG}).
- . . ‘Packing Squares into a Disk with Optimal Worst-Case Density.’ In Proceedings of the 36th European Workshop on Computational Geometry (EuroCG).
- . . ‘Train Scheduling: Hardness and Algorithms.’ In Proceedings of the 14th International Conference and Workshops on Algorithms and Computation (WALCOM). doi: 10.1007/978-3-030-39881-1_30.
- . . ‘Recognition and Reconfiguration of Lattice-Based Cellular Structures by Simple Robots.’ In Proceedings of the International Conference on Robotics and Automation (ICRA).
- . . ‘Worst-Case Optimal Covering of Rectangles by Disks.’ In Proceedings of the 36th International Symposium on Computational Geometry (SoCG).
- . . ‘Space Ants: Constructing and Reconfiguring Large-Scale Structures with Finite Automata.’ In Proceedings of the 36th International Symposium on Computational Geometry (SoCG).
- . . ‘Covering Rectangles by Disks: The Video.’ In Proceedings of the 36th International Symposium on Computational Geometry (SoCG). [akzeptiert / in Druck (unveröffentlicht)]
- . . ‘CADbots: Algorithmic Aspects of Manipulating Programmable Matter with Finite Automata.’ Algorithmica 2020. [akzeptiert / in Druck (unveröffentlicht)]
- . . ‘Scheduling Three Trains is NP-Complete.’ Contributed to the The 32nd Canadian Conference on Computational Geometry, Saskatoon, Saskatchewan, Canada. [akzeptiert / in Druck (unveröffentlicht)]
- . . ‘Connected reconfiguration of lattice-based cellular structures by finite-memory robots.’ Contributed to the 16th International Symposium on Algorithms for Sensor Systems and Experiments for Wireless Sensor Networks (ALGOSENSORS), Pisa, Italy. [akzeptiert / in Druck (unveröffentlicht)]
- . . Continuously Coordinating Geometric Degrees of Freedom: New Aspects and Approaches Habilitationsschrift, Technische Universität Braunschweig. [akzeptiert / in Druck (unveröffentlicht)]
- . . ‘Split Packing: Algorithms for Packing Circles with Optimal Worst-Case Density.’ Discrete & Computational Geometry 61, Nr. 3: 562–594. doi: 10.1007/s00454-018-0020-2.
- . . ‘Coordinated Motion Planning: Coordinating a Swarm of Labeled Robots with Bounded Stretch.’ SIAM Journal on Computing 48, Nr. 6: 1727–1762. doi: 10.1137/18M1194341.
- . . ‘Online Circle Packing.’ In Proceedings of the 16th International Symposium on Algorithms and Data Structures (WADS), 366–379. doi: 10.1007/978-3-030-24766-9_27.
- . . ‘The Prefix Fréchet Similarity.’ In Proceedings of the 13th International Conference and Workshops on Algorithms and Computation (WALCOM), 96–107.
- . . ‘Packing Geometric Objects with Optimal Worst-Case Density.’ In Proceedings of the 35th International Symposium on Computational Geometry, (SoCG), 63:1–63:6.
- . . ‘Packing Disks into Disks with Optimal Worst-Case Density.’ In Proceedings of the 35th International Symposium on Computational Geometry (SoCG), 35:1–35:19.
- . . ‘Universal Guard Problems.’ Int. J. Comput. Geometry Appl. 28, Nr. 2: 129–160. doi: 10.1142/S0218195918600038.
- . . ‘Approximating the Integral Fréchet Distance.’ Comput. Geom. 70: 13–30.
- . . ‘Tilt Assembly: Algorithms for Micro-Factories that Build Objects with Uniform External Forces.’ Algorithmica 2018. doi: 10.1007/s00453-018-0483-9.
- . . ‘Path Refinement in Weighted Regions.’ Algorithmica 80, Nr. 12: 3766–3802. doi: 10.1007/s00453-018-0414-9.
- . . ‘Don't Rock the Boat: Algorithms for Balanced Dynamic Loading and Unloading.’ In Proceedings of the 13th Latin American Symposium on Theoretical Informatics (LATIN), 448–460. doi: 10.1007/978-3-319-77404-6_33.
- . . ‘Coordinated Motion Planning: The Video.’ In Proceedings of the 34th International Symposium on Computational Geometry (SoCG), 74:1–74:5.
- . . ‘Coordinated Motion Planning: Reconfiguring a Swarm of Labeled Robots with Bounded Stretch.’ In Proceedings of the 34th International Symposium on Computational Geometry, (SoCG), 29:1–29:15.
- . . ‘Cadbots: Algorithmic aspects of manipulating programmable matter with finite automata.’ Contributed to the In Proceedings of the 13th International Workshop on the Algorithmic Foundations of Robotics (WAFR), Mérida, Mexiko.
- . . ‘Conflict-Free Coloring of Graphs.’ SIAM J. Discrete Math. 32, Nr. 4: 2675–2702. doi: 10.1137/17M1146579.
- . . ‘On the Traveling Salesman Problem in Solid Grid Graphs.’ In Proceedings of the 33rd European Workshop on Computational Geometry (Euro{CG}), 53–56.
- . . ‘An Efficient Data Structure for Dynamic Two-Dimensional Reconfiguration.’ Journal of Systems Architecture - Embedded Systems Design 75: 15–25.
- . . ‘New Geometric Algorithms for Fully Connected Staged Self-Assembly.’ Theor. Comput. Sci. 671: 4–18. doi: 10.1016/j.tcs.2016.11.020.
- . . ‘Resource-Efficient Dynamic Partial Reconfiguration on FPGAs for Space Instruments.’ In Proceedings of NASA/ESA Conference on Adaptive Hardware and Systems (AHS), 24–31.
- . . ‘Tilt Assembly: Algorithms for Micro-Factories that Build Objects with Uniform External Forces.’ In Proceedings of the 28th International Symposium on Algorithms and Computation (ISAAC), 11:1–11:13.
- . . ‘Split Packing: Packing Circles into Triangles with Optimal Worst-Case Density.’ In Proceedings of the 15th International Symposium on Algorithms and Data Structures (WADS), 373–384. doi: 10.1007/978-3-319-62127-2_32.
- . . ‘Three Colors Suffice: Conflict-Free Coloring of Planar Graphs.’ In Proceedings of the 28th ACM-SIAM Symposium on Discrete Algorithms (SODA), 1951–1963. doi: 10.1137/1.9781611974782.127.
- . . ‘Universal Guards: Guarding All Polygonalizations of a Point Set in the Plane.’ In Proceedings of the fifth Young Researchers Forum ({YRF}), 7–8.
- . . ‘An Efficient Data Structure for Dynamic Two-Dimensional Reconfiguration.’ In Proceedings of 29th International Conference on Architecture of Computing Systems (ARCS), 306–318. doi: 10.1007/978-3-319-30695-7_23.
- . . ‘Approximating the Integral Fréchet Distance.’ In Proceedings of the 15th Scandinavian Symposium and Workshops on Algorithm Theory (SWAT), 26:1–26:14.
- . . ‘Universal Guard Problems.’ In Proceedings of the 27th International Symposium on Algorithms and Computation (ISAAC), 32:1–32:13.
- . . ‘More Flexible Curve Matching via the Partial Fréchet Similarity.’ Int. J. Comput. Geometry Appl. 26, Nr. 1: 33–52.
- . . ‘Near-Linear Time Medial Axis Approximation of Smooth Curves in R^3.’ JoCG 7, Nr. 1: 360–429.
- . . ‘Subquadratic Medial-Axis Approximation in R^3.’ Journal of Computational Geometry 6, Nr. 1: 249–287. doi: 10.20382/jocg.v6i1a11.
- . . ‘New Geometric Algorithms for Fully Connected Staged Self-Assembly.’ In Proceedings of 21st International Conference on Computing and Molecular Programming (DNA), 104–116.
- . . ‘Approximating Geodesic Distances on 2-Manifolds in R^3: The Weighted Case.’ Computational Geometry: Theory & Applications 47, Nr. 8: 789–808. doi: 10.1016/j.comgeo.2014.04.003.
- . . ‘Similarity of polygonal curves in the presence of outliers.’ Computational Geometry: Theory & Applications 47. doi: 10.1016/j.comgeo.2014.01.002. [online first]
- . . ‘Approximating Geodesic Distances on 2-Manifolds in R^3.’ Computational Geometry: Theory & Applications 47, Nr. 2: 125–140. doi: 10.1016/j.comgeo.2012.05.001.
- . . Approximation algorithms for geometrical distance problems that are not solvable exactly Dissertationsschrift, Universität Münster.
- . . ‘Minimum Backward Fréchet Distance.’ In Proceedings of the 22nd ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, 381–388.
- . . ‘Approximating Weighted Geodesic Distances in R^3.’ In Proceedings of the 29th European Workshop on Computational Geometry, edited by , 107–110.
- . . ‘Simplified Medial-Axis Approximation with Guarantees.’ In 28th European Workshop on Computational Geometry, Booklet of Abstracts, edited by , 161–164.
- . . ‘Simplied Medial-Axis Approximation with Guarantees.’ In Proceedings of the first Young Researchers Forum (YRF), 9–10.
- . . ‘Learning a 2-Manifold with a Boundary in R^3.’ In Abstracts from EuroCG 2011, 27th European Workshop on Computational Geometry, edited by , 213–216.
- . . ‘Approximating Geodesic Distances on 2-Manifolds in R^3.’ In Proceedings of the 23rd Canadian Conference on Computational Geometry (CCCG 2011), edited by , 325–330.
Prof. Dr. Christian Scheffer
Einsteinstraße 62
48149 Münster
T: +49 (0)251/83-38412
christian.scheffer@uni-muenster.de