@misc{FuegenschuhStieber, author = {F{\"u}genschuh, Armin and Stieber, Anke}, title = {The Multiple Traveling Salesmen Problem with Moving Targets and Nonlinear Trajectories}, series = {Operations Research Proceedings 2017 : Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Freie Universi{\"a}t Berlin, Germany, September 6-8, 2017}, journal = {Operations Research Proceedings 2017 : Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Freie Universi{\"a}t Berlin, Germany, September 6-8, 2017}, editor = {Kliewer, Natalia and Ehmke, Jan Fabian and Bornd{\"o}rfer, Ralf}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-89920-6}, issn = {0721-5924}, doi = {10.1007/978-3-319-89920-6_65}, pages = {489 -- 494}, abstract = {We consider the multiple traveling salesmen problem with moving targets (MTSPMT), which is a generalization of the classical traveling salesman problem (TSP). Here the nodes (objects, targets) are not static, they are moving over time on trajectories. Moreover, each target has a visibility time window and it can be reached by a salesman only within that time window. The objective function is to minimize the total traveled distances of all salesmen. We recall the time-discrete model formulation from Stieber et al. [9]. This model is applicable to arbitrarily shaped trajectories. Thus, we generated non-linear trajectories based on polynomials, trigonometric functions and their combinations. Computational experiments are carried out with up to 16 trajectories and the results are compared to the ones obtained with linear trajectories.}, language = {en} } @misc{FuegenschuhCraparo, author = {F{\"u}genschuh, Armin and Craparo, Emily M.}, title = {The Multistatic Sonar Location Problem and Mixed-Integer Programming}, series = {Operations Research Proceedings 2017 : Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Freie Universi{\"a}t Berlin, Germany, September 6-8, 2017}, journal = {Operations Research Proceedings 2017 : Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Freie Universi{\"a}t Berlin, Germany, September 6-8, 2017}, editor = {Kliewer, Natalia and Ehmke, Jan Fabian and Bornd{\"o}rfer, Ralf}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-89919-0}, doi = {10.1007/978-3-319-89920-6_67}, pages = {503 -- 508}, abstract = {A multistatic sonar system consists of one or more sources that are able to emit underwater sound, and receivers that listen to the direct sound as well as its reflected sound waves. From the differences in the arrival times of these sounds, it is possible to determine the location of surrounding objects. The propagation of underwater sound is a complex issue that involves several factors, such as the density and pressure of the water, the salinity and temperature level, as well as the pulse length and volume and the reflection properties of the surface. These effects can be approximated by nonlinear equations. Furthermore, natural obstacles in the water, such as the coastline, need to be taken into consideration. Given a certain area of the ocean that should be endowed with a sonar system for surveillance, we consider the task of determining how many sources and receivers need to be deployed, and where they should be located. We give an integer nonlinear formulation for this problem, and several ways to derive an integer linear formulation from it. These formulations are numerically compared using a test bed from coastlines around the world and a state-of-the-art MIP solver (CPLEX).}, language = {en} } @techreport{AmayaMorenoFuegenschuhKaieretal., author = {Amaya Moreno, Liana and F{\"u}genschuh, Armin and Kaier, Anton and Schlobach, Swen}, title = {A Nonlinear Model for Vertical Free-flight Trajectory Planning}, editor = {F{\"u}genschuh, Armin}, publisher = {Helmut-Schmidt-Universit{\"a}t / Universit{\"a}t der Bundeswehr}, address = {Hamburg}, issn = {2199-1928}, pages = {8}, language = {en} } @misc{FuegenschuhBuhlBambach, author = {F{\"u}genschuh, Armin and Buhl, Johannes and Bambach, Markus}, title = {Trajectory Optimization for Wire-Arc Additive Manufacturing}, series = {Operations Research Proceedings 2018 ; selected papers of the Annual International Conference of the German Operations Research Society (GOR), Brussels, Belgium, September 12-14, 2018}, journal = {Operations Research Proceedings 2018 ; selected papers of the Annual International Conference of the German Operations Research Society (GOR), Brussels, Belgium, September 12-14, 2018}, editor = {Fortz, Bernard and Labb{\´e}, Martine}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-18499-5}, doi = {10.1007/978-3-030-18500-8}, pages = {331 -- 337}, language = {en} } @misc{BaehrRadowBreussetal., author = {B{\"a}hr, Martin and Radow, Georg and Breuß, Michael and F{\"u}genschuh, Armin}, title = {Computation of Stable Honeycomb Structures for Additive Manufacturing}, series = {Operations Research Proceedings 2018, Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Brussels, Belgium, September 12-14, 2018}, journal = {Operations Research Proceedings 2018, Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Brussels, Belgium, September 12-14, 2018}, editor = {Fortz, Bernard and Labb{\´e}, Martine}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-18499-5}, issn = {978-3-030-18500-8}, doi = {10.1007/978-3-030-18500-8_45}, pages = {363 -- 369}, abstract = {In certain additive manufacturing processes of industrial interest, the task arises to build up structures layer-wise in a purely vertical manner. The question arises how to construct such a structure in a convenient way so that it is structurally as stable as possible. In this paper, we consider the automatic construction of a honeycomb structure, given the boundary of a shape of interest. In doing this we employ Lloyd's algorithm in two different realisations. For computing the incorporated Voronoi tessellation we consider the use of a Delaunay triangulation or the Eikonal equation. As a main point of our paper, we give a comparison of these two methods. We show that one can make use of the arising graph of the honeycomb structure as input for a specific routing scheme that enhances printability when the printing material stays soft for some time during the printing process.}, language = {en} } @misc{AmayaMorenoYuanFuegenschuhetal., author = {Amaya Moreno, Liana and Yuan, Zhi and F{\"u}genschuh, Armin and Kaier, Anton and Schlobach, Swen}, title = {Combining NLP and MILP in Vertical Flight Planning}, series = {Operations Research Proceedings 2015 : Selected Papers of the International Conference of the German, Austrian and Swiss Operations Research Societies GOR, {\"O}GOR, SVOR/ASRO), University of Vienna, Austria, September 1-4, 2015}, journal = {Operations Research Proceedings 2015 : Selected Papers of the International Conference of the German, Austrian and Swiss Operations Research Societies GOR, {\"O}GOR, SVOR/ASRO), University of Vienna, Austria, September 1-4, 2015}, editor = {Doerner, Karl Franz and Ljubic, Ivana and Pflug, Georg and Tragler, Gernot}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-42901-4}, issn = {0721-5924}, doi = {10.1007/978-3-319-42902-1_37}, pages = {273 -- 278}, language = {en} } @misc{ButzFuegenschuhWoodetal., author = {Butz, Franz-Friedrich and F{\"u}genschuh, Armin and Wood, Jens Nikolas and Breuer, Michael}, title = {Particle-Image Velocimetry and the Assignment Problem}, series = {Operations Research Proceedings 2016 : Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Helmut Schmidt University Hamburg, Germany, August 30 - September 2, 2016}, journal = {Operations Research Proceedings 2016 : Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Helmut Schmidt University Hamburg, Germany, August 30 - September 2, 2016}, editor = {Fink, A. and F{\"u}genschuh, Armin and Geiger, M.-J.}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-55701-4}, issn = {0721-5924}, doi = {10.1007/978-3-319-55702-1_33}, pages = {243 -- 249}, language = {en} } @misc{AmayaMorenoFuegenschuhKaieretal., author = {Amaya Moreno, Liana and F{\"u}genschuh, Armin and Kaier, Anton and Schlobach, Swen}, title = {A Nonlinear Model for Vertical Free-Flight Trajectory Planning}, series = {Operations Research Proceedings 2017 : Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Freie Universi{\"a}t Berlin, Germany, September 6-8, 2017}, journal = {Operations Research Proceedings 2017 : Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Freie Universi{\"a}t Berlin, Germany, September 6-8, 2017}, editor = {Kliewer, Natalia and Bornd{\"o}rfer, Ralf and Ehmke, Jan Fabian}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-89919-0}, issn = {0721-5924}, doi = {10.1007/978-3-319-89920-6_59}, pages = {445 -- 450}, language = {en} } @misc{GnegelDudzinkiFuegenschuhetal., author = {Gnegel, Fabian and Dudzinki, Michael and F{\"u}genschuh, Armin and Striemer, Markus}, title = {Mixed Integer PDE Constrained Optimization for the Control of a Wildfire Hazard}, series = {Operations Research Proceedings 2017 : Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Freie Universi{\"a}t Berlin, Germany, September 6-8, 2017}, journal = {Operations Research Proceedings 2017 : Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Freie Universi{\"a}t Berlin, Germany, September 6-8, 2017}, editor = {Kliewer, Natalia and Bornd{\"o}rfer, Ralf and Ehmke, Jan Fabian}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-89919-0}, issn = {0721-5924}, doi = {10.1007/978-3-319-89920-6_64}, pages = {483 -- 488}, language = {en} } @misc{OeztuerkBonfertTaylorFuegenschuh, author = {{\"O}zt{\"u}rk, Alisan and Bonfert-Taylor, Petra and F{\"u}genschuh, Armin}, title = {Using Data to Improve Programming Instruction}, series = {DeLFI 2018 : die 16. E-Learning Fachtagung Informatik der Gesellschaft f{\"u}r Informatik e. V. : 10.-12. September 2018 Frankfurt am Main, Deutschland}, journal = {DeLFI 2018 : die 16. E-Learning Fachtagung Informatik der Gesellschaft f{\"u}r Informatik e. V. : 10.-12. September 2018 Frankfurt am Main, Deutschland}, editor = {Kr{\"o}mker, Detlef and Schroeder, Ulrik}, publisher = {Gesellschaft f{\"u}r Informatik e.V.}, address = {Bonn}, isbn = {978-3-88579-678-7}, pages = {23 -- 32}, language = {en} }