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The multi-deme structure of the strategy allows for both, intensive, relatively cheap exploration with a moderate accuracy and more accurate search many regions of Pareto set in parallel. The special type of selection operator prefers the coherent alternative solutions, eliminating artifacts appearing in the particular processes. The additional accuracy increment is obtained by the parallel convex searches applied to the local scalarizations of the misfit vector. The strategy is dedicated for solving ill-conditioned problems, for which inverting the single physical process can lead to the ambiguous results. The skill of the selection in artifact elimination is shown on the benchmark problem, while the whole strategy was applied for identification of oil deposits, where the misfits are related to various frequencies of the magnetic and electric waves of the magnetotelluric measurements. 2016 Elsevier B.V."}],"department":[{"_id":"ChWo"}],"month":"01","date_published":"2017-01-01T00:00:00Z","_id":"1152","publist_id":"6206","publication_status":"published","quality_controlled":"1","citation":{"chicago":"Gajda-Zagorska, Ewa P, Robert Schaefer, Maciej Smołka, David Pardo, and Julen Alvarez Aramberri. “A Multi Objective Memetic Inverse Solver Reinforced by Local Optimization Methods.” <i>Journal of Computational Science</i>. Elsevier, 2017. <a href=\"https://doi.org/10.1016/j.jocs.2016.06.007\">https://doi.org/10.1016/j.jocs.2016.06.007</a>.","mla":"Gajda-Zagorska, Ewa P., et al. “A Multi Objective Memetic Inverse Solver Reinforced by Local Optimization Methods.” <i>Journal of Computational Science</i>, vol. 18, Elsevier, 2017, pp. 85–94, doi:<a href=\"https://doi.org/10.1016/j.jocs.2016.06.007\">10.1016/j.jocs.2016.06.007</a>.","ista":"Gajda-Zagorska EP, Schaefer R, Smołka M, Pardo D, Alvarez Aramberri J. 2017. A multi objective memetic inverse solver reinforced by local optimization methods. Journal of Computational Science. 18, 85–94.","ama":"Gajda-Zagorska EP, Schaefer R, Smołka M, Pardo D, Alvarez Aramberri J. A multi objective memetic inverse solver reinforced by local optimization methods. <i>Journal of Computational Science</i>. 2017;18:85-94. doi:<a href=\"https://doi.org/10.1016/j.jocs.2016.06.007\">10.1016/j.jocs.2016.06.007</a>","apa":"Gajda-Zagorska, E. P., Schaefer, R., Smołka, M., Pardo, D., &#38; Alvarez Aramberri, J. (2017). A multi objective memetic inverse solver reinforced by local optimization methods. <i>Journal of Computational Science</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.jocs.2016.06.007\">https://doi.org/10.1016/j.jocs.2016.06.007</a>","ieee":"E. P. Gajda-Zagorska, R. Schaefer, M. Smołka, D. Pardo, and J. Alvarez Aramberri, “A multi objective memetic inverse solver reinforced by local optimization methods,” <i>Journal of Computational Science</i>, vol. 18. Elsevier, pp. 85–94, 2017.","short":"E.P. Gajda-Zagorska, R. Schaefer, M. Smołka, D. Pardo, J. Alvarez Aramberri, Journal of Computational Science 18 (2017) 85–94."},"isi":1,"intvolume":"        18","publication_identifier":{"issn":["1877-7503"]},"oa_version":"Submitted Version","publication":"Journal of Computational Science","has_accepted_license":"1","title":"A multi objective memetic inverse solver reinforced by local optimization methods"},{"language":[{"iso":"eng"}],"file_date_updated":"2020-07-14T12:44:47Z","date_created":"2018-12-11T11:51:37Z","scopus_import":"1","doi":"10.1111/cgf.12941","status":"public","external_id":{"isi":["000408634200019"]},"year":"2017","oa":1,"page":"312 - 337","type":"journal_article","publisher":"Wiley-Blackwell","acknowledgement":"This work was partly supported by the starting grants ADAPT and BigSplash, as well as the advanced grant EXPRESSIVE from the European Research Council (ERC-2012-StG_20111012, ERC-2014-StG_638176 and ERC-2011-ADG_20110209).","user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","day":"01","ddc":["000"],"date_updated":"2023-09-20T11:05:36Z","author":[{"full_name":"Manteaux, Pierre","last_name":"Manteaux","first_name":"Pierre"},{"full_name":"Wojtan, Christopher J","last_name":"Wojtan","orcid":"0000-0001-6646-5546","first_name":"Christopher J","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Narain, Rahul","first_name":"Rahul","last_name":"Narain"},{"full_name":"Redon, Stéphane","last_name":"Redon","first_name":"Stéphane"},{"full_name":"Faure, François","last_name":"Faure","first_name":"François"},{"full_name":"Cani, Marie","last_name":"Cani","first_name":"Marie"}],"article_processing_charge":"No","file":[{"file_size":1434439,"relation":"main_file","file_id":"5208","creator":"system","date_created":"2018-12-12T10:16:21Z","content_type":"application/pdf","date_updated":"2020-07-14T12:44:47Z","access_level":"open_access","checksum":"7676e9a9ead6d58c3000988c97deb2ef","file_name":"IST-2016-634-v1+1_starAdaptivity-cgf.pdf"}],"volume":36,"publication_identifier":{"issn":["01677055"]},"intvolume":"        36","citation":{"ista":"Manteaux P, Wojtan C, Narain R, Redon S, Faure F, Cani M. 2017. Adaptive physically based models in computer graphics. Computer Graphics Forum. 36(6), 312–337.","mla":"Manteaux, Pierre, et al. “Adaptive Physically Based Models in Computer Graphics.” <i>Computer Graphics Forum</i>, vol. 36, no. 6, Wiley-Blackwell, 2017, pp. 312–37, doi:<a href=\"https://doi.org/10.1111/cgf.12941\">10.1111/cgf.12941</a>.","chicago":"Manteaux, Pierre, Chris Wojtan, Rahul Narain, Stéphane Redon, François Faure, and Marie Cani. “Adaptive Physically Based Models in Computer Graphics.” <i>Computer Graphics Forum</i>. Wiley-Blackwell, 2017. <a href=\"https://doi.org/10.1111/cgf.12941\">https://doi.org/10.1111/cgf.12941</a>.","short":"P. Manteaux, C. Wojtan, R. Narain, S. Redon, F. Faure, M. Cani, Computer Graphics Forum 36 (2017) 312–337.","ieee":"P. Manteaux, C. Wojtan, R. Narain, S. Redon, F. Faure, and M. Cani, “Adaptive physically based models in computer graphics,” <i>Computer Graphics Forum</i>, vol. 36, no. 6. Wiley-Blackwell, pp. 312–337, 2017.","apa":"Manteaux, P., Wojtan, C., Narain, R., Redon, S., Faure, F., &#38; Cani, M. (2017). Adaptive physically based models in computer graphics. <i>Computer Graphics Forum</i>. Wiley-Blackwell. <a href=\"https://doi.org/10.1111/cgf.12941\">https://doi.org/10.1111/cgf.12941</a>","ama":"Manteaux P, Wojtan C, Narain R, Redon S, Faure F, Cani M. Adaptive physically based models in computer graphics. <i>Computer Graphics Forum</i>. 2017;36(6):312-337. doi:<a href=\"https://doi.org/10.1111/cgf.12941\">10.1111/cgf.12941</a>"},"isi":1,"quality_controlled":"1","oa_version":"Submitted Version","title":"Adaptive physically based models in computer graphics","has_accepted_license":"1","publication":"Computer Graphics Forum","date_published":"2017-09-01T00:00:00Z","month":"09","department":[{"_id":"ChWo"}],"abstract":[{"text":"One of the major challenges in physically based modelling is making simulations efficient. Adaptive models provide an essential solution to these efficiency goals. These models are able to self-adapt in space and time, attempting to provide the best possible compromise between accuracy and speed. This survey reviews the adaptive solutions proposed so far in computer graphics. Models are classified according to the strategy they use for adaptation, from time-stepping and freezing techniques to geometric adaptivity in the form of structured grids, meshes and particles. Applications range from fluids, through deformable bodies, to articulated solids.","lang":"eng"}],"issue":"6","_id":"1367","publication_status":"published","publist_id":"5873","pubrep_id":"634"},{"user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","publisher":"ACM","ddc":["006"],"date_updated":"2026-04-16T09:58:39Z","day":"01","author":[{"full_name":"Jeschke, Stefan","id":"44D6411A-F248-11E8-B48F-1D18A9856A87","last_name":"Jeschke","first_name":"Stefan","orcid":"0000-0003-4330-8884"},{"full_name":"Wojtan, Christopher J","orcid":"0000-0001-6646-5546","first_name":"Christopher J","last_name":"Wojtan","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87"}],"file":[{"file_name":"wavepackets_final.pdf","date_updated":"2020-07-14T12:46:34Z","checksum":"82a3b2bfeee4ddef16ecc21675d1a48a","access_level":"open_access","creator":"wojtan","content_type":"application/pdf","date_created":"2020-01-24T09:32:35Z","relation":"main_file","file_id":"7359","file_size":13131683}],"article_processing_charge":"Yes (in subscription journal)","volume":36,"language":[{"iso":"eng"}],"file_date_updated":"2020-07-14T12:46:34Z","date_created":"2018-12-11T11:46:39Z","doi":"10.1145/3072959.3073678","scopus_import":"1","oa":1,"year":"2017","external_id":{"isi":["000406432100071"]},"status":"public","type":"journal_article","date_published":"2017-07-01T00:00:00Z","month":"07","project":[{"call_identifier":"H2020","_id":"2533E772-B435-11E9-9278-68D0E5697425","grant_number":"638176","name":"Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large Scales"}],"abstract":[{"text":"This paper presents a method for simulating water surface waves as a displacement field on a 2D domain. Our method relies on Lagrangian particles that carry packets of water wave energy; each packet carries information about an entire group of wave trains, as opposed to only a single wave crest. Our approach is unconditionally stable and can simulate high resolution geometric details. This approach also presents a straightforward interface for artistic control, because it is essentially a particle system with intuitive parameters like wavelength and amplitude. Our implementation parallelizes well and runs in real time for moderately challenging scenarios.","lang":"eng"}],"department":[{"_id":"ChWo"}],"issue":"4","article_type":"original","_id":"470","ec_funded":1,"publist_id":"7350","publication_status":"published","intvolume":"        36","publication_identifier":{"issn":["0730-0301"]},"quality_controlled":"1","citation":{"mla":"Jeschke, Stefan, and Chris Wojtan. “Water Wave Packets.” <i>ACM Transactions on Graphics</i>, vol. 36, no. 4, 103, ACM, 2017, doi:<a href=\"https://doi.org/10.1145/3072959.3073678\">10.1145/3072959.3073678</a>.","chicago":"Jeschke, Stefan, and Chris Wojtan. “Water Wave Packets.” <i>ACM Transactions on Graphics</i>. ACM, 2017. <a href=\"https://doi.org/10.1145/3072959.3073678\">https://doi.org/10.1145/3072959.3073678</a>.","ista":"Jeschke S, Wojtan C. 2017. Water wave packets. ACM Transactions on Graphics. 36(4), 103.","ieee":"S. Jeschke and C. Wojtan, “Water wave packets,” <i>ACM Transactions on Graphics</i>, vol. 36, no. 4. ACM, 2017.","apa":"Jeschke, S., &#38; Wojtan, C. (2017). Water wave packets. <i>ACM Transactions on Graphics</i>. ACM. <a href=\"https://doi.org/10.1145/3072959.3073678\">https://doi.org/10.1145/3072959.3073678</a>","ama":"Jeschke S, Wojtan C. Water wave packets. <i>ACM Transactions on Graphics</i>. 2017;36(4). doi:<a href=\"https://doi.org/10.1145/3072959.3073678\">10.1145/3072959.3073678</a>","short":"S. Jeschke, C. Wojtan, ACM Transactions on Graphics 36 (2017)."},"isi":1,"acknowledged_ssus":[{"_id":"ScienComp"}],"oa_version":"Published Version","article_number":"103","title":"Water wave packets","publication":"ACM Transactions on Graphics","has_accepted_license":"1"},{"citation":{"ista":"Hahn D. 2017. Source codes: Brittle fracture simulation with boundary elements for computer graphics, Institute of Science and Technology Austria, <a href=\"https://doi.org/10.15479/AT:ISTA:73\">10.15479/AT:ISTA:73</a>.","chicago":"Hahn, David. “Source Codes: Brittle Fracture Simulation with Boundary Elements for Computer Graphics.” Institute of Science and Technology Austria, 2017. <a href=\"https://doi.org/10.15479/AT:ISTA:73\">https://doi.org/10.15479/AT:ISTA:73</a>.","mla":"Hahn, David. <i>Source Codes: Brittle Fracture Simulation with Boundary Elements for Computer Graphics</i>. Institute of Science and Technology Austria, 2017, doi:<a href=\"https://doi.org/10.15479/AT:ISTA:73\">10.15479/AT:ISTA:73</a>.","short":"D. Hahn, (2017).","ieee":"D. Hahn, “Source codes: Brittle fracture simulation with boundary elements for computer graphics.” Institute of Science and Technology Austria, 2017.","apa":"Hahn, D. (2017). Source codes: Brittle fracture simulation with boundary elements for computer graphics. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT:ISTA:73\">https://doi.org/10.15479/AT:ISTA:73</a>","ama":"Hahn D. Source codes: Brittle fracture simulation with boundary elements for computer graphics. 2017. doi:<a href=\"https://doi.org/10.15479/AT:ISTA:73\">10.15479/AT:ISTA:73</a>"},"file_date_updated":"2020-07-14T12:47:04Z","keyword":["Boundary elements","brittle fracture","computer graphics","fracture simulation"],"date_created":"2018-12-12T12:31:35Z","doi":"10.15479/AT:ISTA:73","oa_version":"Published Version","status":"public","year":"2017","oa":1,"title":"Source codes: Brittle fracture simulation with boundary elements for computer graphics","has_accepted_license":"1","type":"research_data","project":[{"name":"Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large Scales","call_identifier":"H2020","grant_number":"638176","_id":"2533E772-B435-11E9-9278-68D0E5697425"}],"month":"08","date_published":"2017-08-16T00:00:00Z","publisher":"Institute of Science and Technology Austria","department":[{"_id":"ChWo"}],"related_material":{"record":[{"id":"839","status":"public","relation":"research_paper"}]},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","abstract":[{"lang":"eng","text":"Includes source codes, test cases, and example data used in the thesis Brittle Fracture Simulation with Boundary Elements for Computer Graphics. Also includes pre-built binaries of the HyENA library, but not sources - please contact the HyENA authors to obtain these sources if required (https://mech.tugraz.at/hyena)"}],"day":"16","tmp":{"name":"Creative Commons Attribution-ShareAlike 4.0 International Public License (CC BY-SA 4.0)","legal_code_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","short":"CC BY-SA (4.0)","image":"/images/cc_by_sa.png"},"ddc":["004"],"date_updated":"2026-04-08T14:20:15Z","author":[{"id":"357A6A66-F248-11E8-B48F-1D18A9856A87","first_name":"David","last_name":"Hahn","full_name":"Hahn, David"}],"_id":"5568","article_processing_charge":"No","file":[{"file_name":"IST-2017-73-v1+1_FractureRB_v1.1_2017_07_20_final_public.zip","date_updated":"2020-07-14T12:47:04Z","checksum":"2323a755842a3399cbc47d76545fc9a0","access_level":"open_access","creator":"system","date_created":"2018-12-12T13:02:57Z","content_type":"application/zip","file_id":"5615","relation":"main_file","file_size":199353471}],"ec_funded":1,"datarep_id":"73"},{"supervisor":[{"full_name":"Wojtan, Christopher J","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","first_name":"Christopher J","orcid":"0000-0001-6646-5546","last_name":"Wojtan"}],"alternative_title":["ISTA Thesis"],"language":[{"iso":"eng"}],"date_created":"2018-12-11T11:48:47Z","file_date_updated":"2020-07-14T12:48:13Z","oa":1,"year":"2017","status":"public","doi":"10.15479/AT:ISTA:th_855","type":"dissertation","page":"124","degree_awarded":"PhD","user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","publisher":"Institute of Science and Technology Austria","acknowledgement":"ERC H2020 programme (grant agreement no. 638176)\r\nFirst of all, let me thank my committee members, especially my supervisor, Chris\r\nWojtan, for supporting me throughout my PhD. Obviously, none of this work would\r\nhave been possible without you.\r\nFurthermore, Thank You to all the people who have contributed to this work in various\r\nways, in particular Martin Schanz and his group for providing and supporting the\r\nHyENA boundary element library, as well as Eder Miguel and Morten Bojsen-Hansen\r\nfor (repeatedly) proof reading and providing valuable suggestions during the writing\r\nof this thesis.\r\nI would also like to thank Bernd Bickel, and all the members – past and present – of his\r\nand Chris’ research groups at IST Austria for always providing honest and insightful\r\nfeedback throughout many joint group meetings, as well as Christopher Batty, Eitan\r\nGrinspun, and Fang Da for many insights into boundary element methods during our\r\ncollaboration.\r\nAs only virtual objects have been harmed in the process of creating this work, I would\r\nlike to acknowledge the Stanford scanning repository for providing the “Bunny” and\r\n“Armadillo” models, the AIM@SHAPE repository for “Pierre’s hand, watertight”, and\r\nS. Gainsbourg for the “Column” via Archive3D.net. Sorry for breaking these models\r\nin many different ways.\r\n","author":[{"last_name":"Hahn","first_name":"David","id":"357A6A66-F248-11E8-B48F-1D18A9856A87","full_name":"Hahn, David"}],"day":"14","date_updated":"2026-04-08T14:20:16Z","ddc":["004","005","006","531","621"],"OA_place":"publisher","file":[{"date_created":"2018-12-12T10:14:46Z","content_type":"application/pdf","creator":"system","checksum":"6c1ae8c90bfaba5e089417fefbc4a272","access_level":"open_access","date_updated":"2020-07-14T12:48:13Z","file_name":"IST-2017-855-v1+1_thesis_online_pdfA.pdf","file_size":14596191,"file_id":"5100","relation":"main_file"},{"relation":"source_file","file_id":"6207","file_size":15060566,"file_name":"2017_thesis_Hahn_source.zip","date_updated":"2020-07-14T12:48:13Z","checksum":"421672f68d563b029869c5cf1713f919","access_level":"closed","creator":"dernst","date_created":"2019-04-05T08:40:30Z","content_type":"application/zip"}],"article_processing_charge":"No","citation":{"short":"D. Hahn, Brittle Fracture Simulation with Boundary Elements for Computer Graphics, Institute of Science and Technology Austria, 2017.","ama":"Hahn D. Brittle fracture simulation with boundary elements for computer graphics. 2017. doi:<a href=\"https://doi.org/10.15479/AT:ISTA:th_855\">10.15479/AT:ISTA:th_855</a>","apa":"Hahn, D. (2017). <i>Brittle fracture simulation with boundary elements for computer graphics</i>. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT:ISTA:th_855\">https://doi.org/10.15479/AT:ISTA:th_855</a>","ieee":"D. Hahn, “Brittle fracture simulation with boundary elements for computer graphics,” Institute of Science and Technology Austria, 2017.","ista":"Hahn D. 2017. Brittle fracture simulation with boundary elements for computer graphics. Institute of Science and Technology Austria.","mla":"Hahn, David. <i>Brittle Fracture Simulation with Boundary Elements for Computer Graphics</i>. Institute of Science and Technology Austria, 2017, doi:<a href=\"https://doi.org/10.15479/AT:ISTA:th_855\">10.15479/AT:ISTA:th_855</a>.","chicago":"Hahn, David. “Brittle Fracture Simulation with Boundary Elements for Computer Graphics.” Institute of Science and Technology Austria, 2017. <a href=\"https://doi.org/10.15479/AT:ISTA:th_855\">https://doi.org/10.15479/AT:ISTA:th_855</a>."},"publication_identifier":{"issn":["2663-337X"]},"oa_version":"Published Version","has_accepted_license":"1","corr_author":"1","title":"Brittle fracture simulation with boundary elements for computer graphics","related_material":{"record":[{"relation":"popular_science","status":"public","id":"5568"},{"relation":"part_of_dissertation","status":"public","id":"1362"},{"id":"1633","status":"public","relation":"part_of_dissertation"}]},"abstract":[{"text":"This thesis describes a brittle fracture simulation method for visual effects applications. Building upon a symmetric Galerkin boundary element method, we first compute stress intensity factors following the theory of linear elastic fracture mechanics. We then use these stress intensities to simulate the motion of a propagating crack front at a significantly higher resolution than the overall deformation of the breaking object. Allowing for spatial variations of the material's toughness during crack propagation produces visually realistic, highly-detailed fracture surfaces. Furthermore, we introduce approximations for stress intensities and crack opening displacements, resulting in both practical speed-up and theoretically superior runtime complexity compared to previous methods. While we choose a quasi-static approach to fracture mechanics, ignoring dynamic deformations, we also couple our fracture simulation framework to a standard rigid-body dynamics solver, enabling visual effects artists to simulate both large scale motion, as well as fracturing due to collision forces in a combined system. As fractures inside of an object grow, their geometry must be represented both in the coarse boundary element mesh, as well as at the desired fine output resolution. Using a boundary element method, we avoid complicated volumetric meshing operations. Instead we describe a simple set of surface meshing operations that allow us to progressively add cracks to the mesh of an object and still re-use all previously computed entries of the linear boundary element system matrix. On the high resolution level, we opt for an implicit surface representation. We then describe how to capture fracture surfaces during crack propagation, as well as separate the individual fragments resulting from the fracture process, based on this implicit representation. We show results obtained with our method, either solving the full boundary element system in every time step, or alternatively using our fast approximations. These results demonstrate that both of these methods perform well in basic test cases and produce realistic fracture surfaces. Furthermore we show that our fast approximations substantially out-perform the standard approach in more demanding scenarios. Finally, these two methods naturally combine, using the full solution while the problem size is manageably small and switching to the fast approximations later on. The resulting hybrid method gives the user a direct way to choose between speed and accuracy of the simulation. ","lang":"eng"}],"department":[{"_id":"ChWo"}],"date_published":"2017-08-14T00:00:00Z","month":"08","project":[{"name":"Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large Scales","grant_number":"638176","_id":"2533E772-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"}],"tmp":{"name":"Creative Commons Attribution-ShareAlike 4.0 International Public License (CC BY-SA 4.0)","legal_code_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","short":"CC BY-SA (4.0)","image":"/images/cc_by_sa.png"},"ec_funded":1,"_id":"839","pubrep_id":"855","publist_id":"6809","publication_status":"published"},{"oa_version":"Published Version","title":"Interactive paper tearing","publication":"Computer Graphics Forum","intvolume":"        36","publication_identifier":{"issn":["01677055"]},"quality_controlled":"1","isi":1,"citation":{"short":"C. Schreck, D. Rohmer, S. Hahmann, Computer Graphics Forum 36 (2017) 95–106.","ama":"Schreck C, Rohmer D, Hahmann S. Interactive paper tearing. <i>Computer Graphics Forum</i>. 2017;36(2):95-106. doi:<a href=\"https://doi.org/10.1111/cgf.13110\">10.1111/cgf.13110</a>","ieee":"C. Schreck, D. Rohmer, and S. Hahmann, “Interactive paper tearing,” <i>Computer Graphics Forum</i>, vol. 36, no. 2. Wiley, pp. 95–106, 2017.","apa":"Schreck, C., Rohmer, D., &#38; Hahmann, S. (2017). Interactive paper tearing. <i>Computer Graphics Forum</i>. Wiley. <a href=\"https://doi.org/10.1111/cgf.13110\">https://doi.org/10.1111/cgf.13110</a>","ista":"Schreck C, Rohmer D, Hahmann S. 2017. Interactive paper tearing. Computer Graphics Forum. 36(2), 95–106.","chicago":"Schreck, Camille, Damien Rohmer, and Stefanie Hahmann. “Interactive Paper Tearing.” <i>Computer Graphics Forum</i>. Wiley, 2017. <a href=\"https://doi.org/10.1111/cgf.13110\">https://doi.org/10.1111/cgf.13110</a>.","mla":"Schreck, Camille, et al. “Interactive Paper Tearing.” <i>Computer Graphics Forum</i>, vol. 36, no. 2, Wiley, 2017, pp. 95–106, doi:<a href=\"https://doi.org/10.1111/cgf.13110\">10.1111/cgf.13110</a>."},"article_type":"original","_id":"670","publication_status":"published","publist_id":"7056","date_published":"2017-05-01T00:00:00Z","month":"05","project":[{"name":"Deep Pictures: Creating Visual and Haptic Vector Images","call_identifier":"FWF","_id":"25357BD2-B435-11E9-9278-68D0E5697425","grant_number":"P 24352-N23"}],"abstract":[{"text":"We propose an efficient method to model paper tearing in the context of interactive modeling. The method uses geometrical information to automatically detect potential starting points of tears. We further introduce a new hybrid geometrical and physical-based method to compute the trajectory of tears while procedurally synthesizing high resolution details of the tearing path using a texture based approach. The results obtained are compared with real paper and with previous studies on the expected geometric paths of paper that tears.","lang":"eng"}],"department":[{"_id":"ChWo"}],"issue":"2","doi":"10.1111/cgf.13110","scopus_import":"1","year":"2017","oa":1,"external_id":{"isi":["000404474000011"]},"status":"public","type":"journal_article","page":"95 - 106","language":[{"iso":"eng"}],"date_created":"2018-12-11T11:47:49Z","article_processing_charge":"No","main_file_link":[{"url":"https://hal.inria.fr/hal-01647113/file/eg_2017_schreck_paper_tearing.pdf","open_access":"1"}],"volume":36,"user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","publisher":"Wiley","date_updated":"2025-09-11T07:02:03Z","day":"01","ddc":["000"],"author":[{"full_name":"Schreck, Camille","first_name":"Camille","last_name":"Schreck","id":"2B14B676-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Rohmer","first_name":"Damien","full_name":"Rohmer, Damien"},{"full_name":"Hahmann, Stefanie","first_name":"Stefanie","last_name":"Hahmann"}]},{"author":[{"full_name":"Rebuffi, Sylvestre Alvise","last_name":"Rebuffi","first_name":"Sylvestre Alvise"},{"full_name":"Kolesnikov, Alexander","first_name":"Alexander","last_name":"Kolesnikov","id":"2D157DB6-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Sperl, Georg","first_name":"Georg","last_name":"Sperl","id":"4DD40360-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Lampert, Christoph","last_name":"Lampert","orcid":"0000-0001-8622-7887","first_name":"Christoph","id":"40C20FD2-F248-11E8-B48F-1D18A9856A87"}],"date_updated":"2025-06-04T08:18:32Z","day":"14","publisher":"IEEE","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","volume":2017,"main_file_link":[{"url":"https://arxiv.org/abs/1611.07725","open_access":"1"}],"article_processing_charge":"No","date_created":"2018-12-11T11:49:37Z","language":[{"iso":"eng"}],"page":"5533 - 5542","type":"conference","external_id":{"arxiv":["1611.07725"],"isi":["000418371405066"]},"status":"public","conference":{"end_date":"2017-07-26","name":"CVPR: Computer Vision and Pattern Recognition","start_date":"2017-07-21","location":"Honolulu, HA, United States"},"year":"2017","oa":1,"scopus_import":"1","doi":"10.1109/CVPR.2017.587","department":[{"_id":"ChLa"},{"_id":"ChWo"}],"abstract":[{"lang":"eng","text":"A major open problem on the road to artificial intelligence is the development of incrementally learning systems that learn about more and more concepts over time from a stream of data. In this work, we introduce a new training strategy, iCaRL, that allows learning in such a class-incremental way: only the training data for a small number of classes has to be present at the same time and new classes can be added progressively. iCaRL learns strong classifiers and a data representation simultaneously. This distinguishes it from earlier works that were fundamentally limited to fixed data representations and therefore incompatible with deep learning architectures. We show by experiments on CIFAR-100 and ImageNet ILSVRC 2012 data that iCaRL can learn many classes incrementally over a long period of time where other strategies quickly fail. "}],"project":[{"name":"Lifelong Learning of Visual Scene Understanding","grant_number":"308036","_id":"2532554C-B435-11E9-9278-68D0E5697425","call_identifier":"FP7"}],"month":"04","date_published":"2017-04-14T00:00:00Z","publication_status":"published","publist_id":"6400","ec_funded":1,"_id":"998","citation":{"short":"S.A. Rebuffi, A. Kolesnikov, G. Sperl, C. Lampert, in:, IEEE, 2017, pp. 5533–5542.","ieee":"S. A. Rebuffi, A. Kolesnikov, G. Sperl, and C. Lampert, “iCaRL: Incremental classifier and representation learning,” presented at the CVPR: Computer Vision and Pattern Recognition, Honolulu, HA, United States, 2017, vol. 2017, pp. 5533–5542.","apa":"Rebuffi, S. A., Kolesnikov, A., Sperl, G., &#38; Lampert, C. (2017). iCaRL: Incremental classifier and representation learning (Vol. 2017, pp. 5533–5542). Presented at the CVPR: Computer Vision and Pattern Recognition, Honolulu, HA, United States: IEEE. <a href=\"https://doi.org/10.1109/CVPR.2017.587\">https://doi.org/10.1109/CVPR.2017.587</a>","ama":"Rebuffi SA, Kolesnikov A, Sperl G, Lampert C. iCaRL: Incremental classifier and representation learning. In: Vol 2017. IEEE; 2017:5533-5542. doi:<a href=\"https://doi.org/10.1109/CVPR.2017.587\">10.1109/CVPR.2017.587</a>","ista":"Rebuffi SA, Kolesnikov A, Sperl G, Lampert C. 2017. iCaRL: Incremental classifier and representation learning. CVPR: Computer Vision and Pattern Recognition vol. 2017, 5533–5542.","chicago":"Rebuffi, Sylvestre Alvise, Alexander Kolesnikov, Georg Sperl, and Christoph Lampert. “ICaRL: Incremental Classifier and Representation Learning,” 2017:5533–42. IEEE, 2017. <a href=\"https://doi.org/10.1109/CVPR.2017.587\">https://doi.org/10.1109/CVPR.2017.587</a>.","mla":"Rebuffi, Sylvestre Alvise, et al. <i>ICaRL: Incremental Classifier and Representation Learning</i>. Vol. 2017, IEEE, 2017, pp. 5533–42, doi:<a href=\"https://doi.org/10.1109/CVPR.2017.587\">10.1109/CVPR.2017.587</a>."},"isi":1,"quality_controlled":"1","publication_identifier":{"isbn":["978-153860457-1"]},"intvolume":"      2017","arxiv":1,"title":"iCaRL: Incremental classifier and representation learning","oa_version":"Submitted Version"},{"oa_version":"Published Version","has_accepted_license":"1","title":"Tracking, correcting and absorbing water surface waves","corr_author":"1","citation":{"ista":"Bojsen-Hansen M. 2016. Tracking, correcting and absorbing water surface waves. Institute of Science and Technology Austria.","chicago":"Bojsen-Hansen, Morten. “Tracking, Correcting and Absorbing Water Surface Waves.” Institute of Science and Technology Austria, 2016. <a href=\"https://doi.org/10.15479/AT:ISTA:th_640\">https://doi.org/10.15479/AT:ISTA:th_640</a>.","mla":"Bojsen-Hansen, Morten. <i>Tracking, Correcting and Absorbing Water Surface Waves</i>. Institute of Science and Technology Austria, 2016, doi:<a href=\"https://doi.org/10.15479/AT:ISTA:th_640\">10.15479/AT:ISTA:th_640</a>.","short":"M. Bojsen-Hansen, Tracking, Correcting and Absorbing Water Surface Waves, Institute of Science and Technology Austria, 2016.","ama":"Bojsen-Hansen M. Tracking, correcting and absorbing water surface waves. 2016. doi:<a href=\"https://doi.org/10.15479/AT:ISTA:th_640\">10.15479/AT:ISTA:th_640</a>","apa":"Bojsen-Hansen, M. (2016). <i>Tracking, correcting and absorbing water surface waves</i>. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT:ISTA:th_640\">https://doi.org/10.15479/AT:ISTA:th_640</a>","ieee":"M. Bojsen-Hansen, “Tracking, correcting and absorbing water surface waves,” Institute of Science and Technology Austria, 2016."},"publication_identifier":{"issn":["2663-337X"]},"_id":"1122","publication_status":"published","publist_id":"6238","department":[{"_id":"ChWo"}],"abstract":[{"text":"Computer graphics is an extremely exciting field for two reasons. On the one hand,\r\nthere is a healthy injection of pragmatism coming from the visual effects industry\r\nthat want robust algorithms that work so they can produce results at an increasingly\r\nfrantic pace. On the other hand, they must always try to push the envelope and\r\nachieve the impossible to wow their audiences in the next blockbuster, which means\r\nthat the industry has not succumb to conservatism, and there is plenty of room to\r\ntry out new and crazy ideas if there is a chance that it will pan into something\r\nuseful.\r\nWater simulation has been in visual effects for decades, however it still remains\r\nextremely challenging because of its high computational cost and difficult artdirectability.\r\nThe work in this thesis tries to address some of these difficulties.\r\nSpecifically, we make the following three novel contributions to the state-of-the-art\r\nin water simulation for visual effects.\r\nFirst, we develop the first algorithm that can convert any sequence of closed\r\nsurfaces in time into a moving triangle mesh. State-of-the-art methods at the time\r\ncould only handle surfaces with fixed connectivity, but we are the first to be able to\r\nhandle surfaces that merge and split apart. This is important for water simulation\r\npractitioners, because it allows them to convert splashy water surfaces extracted\r\nfrom particles or simulated using grid-based level sets into triangle meshes that can\r\nbe either textured and enhanced with extra surface dynamics as a post-process.\r\nWe also apply our algorithm to other phenomena that merge and split apart, such\r\nas morphs and noisy reconstructions of human performances.\r\nSecond, we formulate a surface-based energy that measures the deviation of a\r\nwater surface froma physically valid state. Such discrepancies arise when there is a\r\nmismatch in the degrees of freedom between the water surface and the underlying\r\nphysics solver. This commonly happens when practitioners use a moving triangle\r\nmesh with a grid-based physics solver, or when high-resolution grid-based surfaces\r\nare combined with low-resolution physics. Following the direction of steepest\r\ndescent on our surface-based energy, we can either smooth these artifacts or turn\r\nthem into high-resolution waves by interpreting the energy as a physical potential.\r\nThird, we extend state-of-the-art techniques in non-reflecting boundaries to handle spatially and time-varying background flows. This allows a novel new\r\nworkflow where practitioners can re-simulate part of an existing simulation, such\r\nas removing a solid obstacle, adding a new splash or locally changing the resolution.\r\nSuch changes can easily lead to new waves in the re-simulated region that would\r\nreflect off of the new simulation boundary, effectively ruining the illusion of a\r\nseamless simulation boundary between the existing and new simulations. Our\r\nnon-reflecting boundaries makes sure that such waves are absorbed.","lang":"eng"}],"related_material":{"record":[{"id":"5558","relation":"other","status":"public"}]},"date_published":"2016-07-15T00:00:00Z","month":"07","tmp":{"short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"status":"public","year":"2016","oa":1,"doi":"10.15479/AT:ISTA:th_640","page":"114","type":"dissertation","degree_awarded":"PhD","language":[{"iso":"eng"}],"supervisor":[{"full_name":"Wojtan, Christopher J","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","first_name":"Christopher J","orcid":"0000-0001-6646-5546","last_name":"Wojtan"}],"alternative_title":["ISTA Thesis"],"date_created":"2018-12-11T11:50:16Z","file_date_updated":"2018-12-12T10:13:02Z","OA_place":"publisher","article_processing_charge":"No","file":[{"relation":"main_file","file_id":"4982","file_size":13869345,"file_name":"IST-2016-640-v1+1_2016_Bojsen-Hansen_TCaAWSW.pdf","access_level":"open_access","date_updated":"2018-12-12T10:13:02Z","content_type":"application/pdf","date_created":"2018-12-12T10:13:02Z","creator":"system"}],"publisher":"Institute of Science and Technology Austria","acknowledgement":"First and foremost I would like to thank Chris. I have been incredibly lucky to have\r\nyou as my advisor. Your integrity and aspiration to do the right thing in all walks of\r\nlife is something I admire and aspire to. I also really appreciate the fact that when\r\nworking with you it felt like we were equals. I think we had a very synergetic work\r\nrelationship: I learned immensely from you, but I dare say that you learned a few\r\nthings from me as well. ;)\r\nNext, I would like to thank my amazing committee. Hao, it was a fantastic\r\nexperience working with you. You showed me how to persevere and keep morale\r\nhigh when things were looking the most bleak before the deadline. You are an\r\nincredible motivator and super fun to be around! Vladimir, thanks for the shared\r\nlunches and the poker games. Sorry for not bringing them back when I got busy.\r\nAlso, sorry for embarrassing you by asking about your guitar playing that one\r\ntime. You really are quite awesome! Nils, one of the friendliest and most humble\r\npeople you will meet and a top notch researcher to boot! Thank you for joining\r\nmy committee late!\r\nI would also like to acknowledge the Visual Computing group at IST Austria\r\nfrom whom I have learned so much. The excellent discussions we had in reading\r\ngroups and research meetings really helped me become a better researcher!\r\nNext, I would like to thank all the amazing people that I met during my PhD\r\nstudies, both at IST Austria, in Vienna and elsewhere. ","user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","author":[{"last_name":"Bojsen-Hansen","first_name":"Morten","orcid":"0000-0002-4417-3224","id":"439F0C8C-F248-11E8-B48F-1D18A9856A87","full_name":"Bojsen-Hansen, Morten"}],"ddc":["004","005","006","532","621"],"date_updated":"2026-04-08T14:24:06Z","day":"15"},{"quality_controlled":"1","citation":{"short":"P. Manteaux, U. Vimont, C. Wojtan, D. Rohmer, M. Cani, in:, Proceedings of the 9th International Conference on Motion in Games , ACM, 2016.","ama":"Manteaux P, Vimont U, Wojtan C, Rohmer D, Cani M. Space-time sculpting of liquid animation. In: <i>Proceedings of the 9th International Conference on Motion in Games </i>. ACM; 2016. doi:<a href=\"https://doi.org/10.1145/2994258.2994261\">10.1145/2994258.2994261</a>","ieee":"P. Manteaux, U. Vimont, C. Wojtan, D. Rohmer, and M. Cani, “Space-time sculpting of liquid animation,” in <i>Proceedings of the 9th International Conference on Motion in Games </i>, San Francisco, CA, USA, 2016.","apa":"Manteaux, P., Vimont, U., Wojtan, C., Rohmer, D., &#38; Cani, M. (2016). Space-time sculpting of liquid animation. In <i>Proceedings of the 9th International Conference on Motion in Games </i>. San Francisco, CA, USA: ACM. <a href=\"https://doi.org/10.1145/2994258.2994261\">https://doi.org/10.1145/2994258.2994261</a>","ista":"Manteaux P, Vimont U, Wojtan C, Rohmer D, Cani M. 2016. Space-time sculpting of liquid animation. Proceedings of the 9th International Conference on Motion in Games . MIG: Motion in Games, 2994261.","chicago":"Manteaux, Pierre, Ulysse Vimont, Chris Wojtan, Damien Rohmer, and Marie Cani. “Space-Time Sculpting of Liquid Animation.” In <i>Proceedings of the 9th International Conference on Motion in Games </i>. ACM, 2016. <a href=\"https://doi.org/10.1145/2994258.2994261\">https://doi.org/10.1145/2994258.2994261</a>.","mla":"Manteaux, Pierre, et al. “Space-Time Sculpting of Liquid Animation.” <i>Proceedings of the 9th International Conference on Motion in Games </i>, 2994261, ACM, 2016, doi:<a href=\"https://doi.org/10.1145/2994258.2994261\">10.1145/2994258.2994261</a>."},"publication":"Proceedings of the 9th International Conference on Motion in Games ","has_accepted_license":"1","title":"Space-time sculpting of liquid animation","article_number":"2994261","oa_version":"Submitted Version","abstract":[{"text":"We propose an interactive sculpting system for seamlessly editing pre-computed animations of liquid, without the need for any resimulation. The input is a sequence of meshes without correspondences representing the liquid surface over time. Our method enables the efficient selection of consistent space-time parts of this animation, such as moving waves or droplets, which we call space-time features. Once selected, a feature can be copied, edited, or duplicated and then pasted back anywhere in space and time in the same or in another liquid animation sequence. Our method circumvents tedious user interactions by automatically computing the spatial and temporal ranges of the selected feature. We also provide space-time shape editing tools for non-uniform scaling, rotation, trajectory changes, and temporal editing to locally speed up or slow down motion. Using our tools, the user can edit and progressively refine any input simulation result, possibly using a library of precomputed space-time features extracted from other animations. In contrast to the trial-and-error loop usually required to edit animation results through the tuning of indirect simulation parameters, our method gives the user full control over the edited space-time behaviors. © 2016 Copyright held by the owner/author(s).","lang":"eng"}],"department":[{"_id":"ChWo"}],"date_published":"2016-10-10T00:00:00Z","month":"10","project":[{"name":"Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large Scales","_id":"2533E772-B435-11E9-9278-68D0E5697425","grant_number":"638176","call_identifier":"H2020"}],"publication_status":"published","publist_id":"6222","ec_funded":1,"_id":"1136","date_created":"2018-12-11T11:50:20Z","language":[{"iso":"eng"}],"type":"conference","conference":{"end_date":"2016-10-12","name":"MIG: Motion in Games","location":"San Francisco, CA, USA","start_date":"2016-10-10"},"oa":1,"year":"2016","status":"public","doi":"10.1145/2994258.2994261","scopus_import":"1","author":[{"full_name":"Manteaux, Pierre","last_name":"Manteaux","first_name":"Pierre"},{"full_name":"Vimont, Ulysse","last_name":"Vimont","first_name":"Ulysse"},{"orcid":"0000-0001-6646-5546","first_name":"Christopher J","last_name":"Wojtan","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","full_name":"Wojtan, Christopher J"},{"full_name":"Rohmer, Damien","first_name":"Damien","last_name":"Rohmer"},{"full_name":"Cani, Marie","first_name":"Marie","last_name":"Cani"}],"ddc":["004"],"day":"10","date_updated":"2024-10-22T09:58:18Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publisher":"ACM","acknowledgement":"This work was partly supported by the starting grant BigSplash, as well as the advanced grant EXPRESSIVE from the European Research Council (ERC-2014-StG 638176 , and ERC-2011-ADG 20110209).","main_file_link":[{"url":"https://hal.inria.fr/hal-01367181","open_access":"1"}],"article_processing_charge":"No"},{"date_created":"2018-12-11T11:50:22Z","language":[{"iso":"eng"}],"page":"249 - 260","type":"journal_article","external_id":{"isi":["000390625600021"]},"status":"public","year":"2016","scopus_import":"1","doi":"10.1016/j.jocs.2016.03.004","author":[{"last_name":"Łazarz","first_name":"Radosław","full_name":"Łazarz, Radosław"},{"last_name":"Idzik","first_name":"Michał","full_name":"Idzik, Michał"},{"full_name":"Gądek, Konrad","last_name":"Gądek","first_name":"Konrad"},{"full_name":"Gajda-Zagorska, Ewa P","last_name":"Gajda-Zagorska","first_name":"Ewa P","id":"47794CF0-F248-11E8-B48F-1D18A9856A87"}],"day":"01","date_updated":"2025-09-22T14:11:23Z","acknowledgement":"The work presented in this paper was partially supported by Polish National Science Centre grant nos. DEC-2012/05/N/ST6/03433 and DEC-2011/03/B/ST6/01393. Radosław Łazarz was supported by Polish National Science Centre grant no. DEC-2013/10/M/ST6/00531.","publisher":"Elsevier","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","volume":17,"article_processing_charge":"No","isi":1,"citation":{"short":"R. Łazarz, M. Idzik, K. Gądek, E.P. Gajda-Zagorska, Journal of Computational Science 17 (2016) 249–260.","ieee":"R. Łazarz, M. Idzik, K. Gądek, and E. P. Gajda-Zagorska, “Hierarchic genetic strategy with maturing as a generic tool for multiobjective optimization,” <i>Journal of Computational Science</i>, vol. 17, no. 1. Elsevier, pp. 249–260, 2016.","apa":"Łazarz, R., Idzik, M., Gądek, K., &#38; Gajda-Zagorska, E. P. (2016). Hierarchic genetic strategy with maturing as a generic tool for multiobjective optimization. <i>Journal of Computational Science</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.jocs.2016.03.004\">https://doi.org/10.1016/j.jocs.2016.03.004</a>","ama":"Łazarz R, Idzik M, Gądek K, Gajda-Zagorska EP. Hierarchic genetic strategy with maturing as a generic tool for multiobjective optimization. <i>Journal of Computational Science</i>. 2016;17(1):249-260. doi:<a href=\"https://doi.org/10.1016/j.jocs.2016.03.004\">10.1016/j.jocs.2016.03.004</a>","ista":"Łazarz R, Idzik M, Gądek K, Gajda-Zagorska EP. 2016. Hierarchic genetic strategy with maturing as a generic tool for multiobjective optimization. Journal of Computational Science. 17(1), 249–260.","chicago":"Łazarz, Radosław, Michał Idzik, Konrad Gądek, and Ewa P Gajda-Zagorska. “Hierarchic Genetic Strategy with Maturing as a Generic Tool for Multiobjective Optimization.” <i>Journal of Computational Science</i>. Elsevier, 2016. <a href=\"https://doi.org/10.1016/j.jocs.2016.03.004\">https://doi.org/10.1016/j.jocs.2016.03.004</a>.","mla":"Łazarz, Radosław, et al. “Hierarchic Genetic Strategy with Maturing as a Generic Tool for Multiobjective Optimization.” <i>Journal of Computational Science</i>, vol. 17, no. 1, Elsevier, 2016, pp. 249–60, doi:<a href=\"https://doi.org/10.1016/j.jocs.2016.03.004\">10.1016/j.jocs.2016.03.004</a>."},"quality_controlled":"1","intvolume":"        17","publication":"Journal of Computational Science","title":"Hierarchic genetic strategy with maturing as a generic tool for multiobjective optimization","oa_version":"None","issue":"1","department":[{"_id":"ChWo"}],"abstract":[{"text":"In this paper we introduce the Multiobjective Optimization Hierarchic Genetic Strategy with maturing (MO-mHGS), a meta-algorithm that performs evolutionary optimization in a hierarchy of populations. The maturing mechanism improves growth and reduces redundancy. The performance of MO-mHGS with selected state-of-the-art multiobjective evolutionary algorithms as internal algorithms is analysed on benchmark problems and their modifications for which single fitness evaluation time depends on the solution accuracy. We compare the proposed algorithm with the Island Model Genetic Algorithm as well as with single-deme methods, and discuss the impact of internal algorithms on the MO-mHGS meta-algorithm. © 2016 Elsevier B.V.","lang":"eng"}],"month":"11","date_published":"2016-11-01T00:00:00Z","publist_id":"6217","publication_status":"published","_id":"1141"},{"volume":35,"file":[{"file_name":"IST-2016-637-v1+1_2016_Da_SOL.pdf","date_updated":"2020-07-14T12:44:46Z","access_level":"open_access","checksum":"6d662893bd447d4f575b4961a2247811","creator":"system","date_created":"2018-12-12T10:08:01Z","content_type":"application/pdf","relation":"main_file","file_id":"4660","file_size":10561865}],"article_processing_charge":"No","author":[{"first_name":"Fang","last_name":"Da","full_name":"Da, Fang"},{"full_name":"Hahn, David","last_name":"Hahn","first_name":"David","id":"357A6A66-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Batty","first_name":"Christopher","full_name":"Batty, Christopher"},{"full_name":"Wojtan, Christopher J","orcid":"0000-0001-6646-5546","first_name":"Christopher J","last_name":"Wojtan","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Grinspun, Eitan","last_name":"Grinspun","first_name":"Eitan"}],"date_updated":"2025-09-22T07:44:26Z","ddc":["000"],"day":"11","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","publisher":"ACM","type":"conference","year":"2016","conference":{"end_date":"2016-07-28","name":"ACM SIGGRAPH","location":"Anaheim, CA, USA","start_date":"2016-07-24"},"oa":1,"external_id":{"isi":["000380112400048"]},"status":"public","doi":"10.1145/2897824.2925899","scopus_import":"1","date_created":"2018-12-11T11:51:35Z","file_date_updated":"2020-07-14T12:44:46Z","language":[{"iso":"eng"}],"alternative_title":["ACM Transactions on Graphics"],"pubrep_id":"637","publist_id":"5881","publication_status":"published","ec_funded":1,"_id":"1361","issue":"4","abstract":[{"text":"We propose a novel surface-only technique for simulating incompressible, inviscid and uniform-density liquids with surface tension in three dimensions. The liquid surface is captured by a triangle mesh on which a Lagrangian velocity field is stored. Because advection of the velocity field may violate the incompressibility condition, we devise an orthogonal projection technique to remove the divergence while requiring the evaluation of only two boundary integrals. The forces of surface tension, gravity, and solid contact are all treated by a boundary element solve, allowing us to perform detailed simulations of a wide range of liquid phenomena, including waterbells, droplet and jet collisions, fluid chains, and crown splashes.","lang":"eng"}],"department":[{"_id":"ChWo"}],"month":"07","date_published":"2016-07-11T00:00:00Z","project":[{"name":"Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large Scales","grant_number":"638176","_id":"2533E772-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"}],"has_accepted_license":"1","title":"Surface only liquids","article_number":"a78","oa_version":"Published Version","quality_controlled":"1","citation":{"chicago":"Da, Fang, David Hahn, Christopher Batty, Chris Wojtan, and Eitan Grinspun. “Surface Only Liquids,” Vol. 35. ACM, 2016. <a href=\"https://doi.org/10.1145/2897824.2925899\">https://doi.org/10.1145/2897824.2925899</a>.","mla":"Da, Fang, et al. <i>Surface Only Liquids</i>. Vol. 35, no. 4, a78, ACM, 2016, doi:<a href=\"https://doi.org/10.1145/2897824.2925899\">10.1145/2897824.2925899</a>.","ista":"Da F, Hahn D, Batty C, Wojtan C, Grinspun E. 2016. Surface only liquids. ACM SIGGRAPH, ACM Transactions on Graphics, vol. 35, a78.","ama":"Da F, Hahn D, Batty C, Wojtan C, Grinspun E. Surface only liquids. In: Vol 35. ACM; 2016. doi:<a href=\"https://doi.org/10.1145/2897824.2925899\">10.1145/2897824.2925899</a>","apa":"Da, F., Hahn, D., Batty, C., Wojtan, C., &#38; Grinspun, E. (2016). Surface only liquids (Vol. 35). Presented at the ACM SIGGRAPH, Anaheim, CA, USA: ACM. <a href=\"https://doi.org/10.1145/2897824.2925899\">https://doi.org/10.1145/2897824.2925899</a>","ieee":"F. Da, D. Hahn, C. Batty, C. Wojtan, and E. Grinspun, “Surface only liquids,” presented at the ACM SIGGRAPH, Anaheim, CA, USA, 2016, vol. 35, no. 4.","short":"F. Da, D. Hahn, C. Batty, C. Wojtan, E. Grinspun, in:, ACM, 2016."},"isi":1,"intvolume":"        35"},{"pubrep_id":"632","publist_id":"5880","publication_status":"published","_id":"1362","ec_funded":1,"issue":"4","tmp":{"short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"date_published":"2016-07-01T00:00:00Z","month":"07","project":[{"call_identifier":"H2020","_id":"2533E772-B435-11E9-9278-68D0E5697425","grant_number":"638176","name":"Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large Scales"}],"abstract":[{"text":"We present a boundary element based method for fast simulation of brittle fracture. By introducing simplifying assumptions that allow us to quickly estimate stress intensities and opening displacements during crack propagation, we build a fracture algorithm where the cost of each time step scales linearly with the length of the crackfront. The transition from a full boundary element method to our faster variant is possible at the beginning of any time step. This allows us to build a hybrid method, which uses the expensive but more accurate BEM while the number of degrees of freedom is low, and uses the fast method once that number exceeds a given threshold as the crack geometry becomes more complicated. Furthermore, we integrate this fracture simulation with a standard rigid-body solver. Our rigid-body coupling solves a Neumann boundary value problem by carefully separating translational, rotational and deformational components of the collision forces and then applying a Tikhonov regularizer to the resulting linear system. We show that our method produces physically reasonable results in standard test cases and is capable of dealing with complex scenes faster than previous finite- or boundary element approaches.","lang":"eng"}],"related_material":{"record":[{"relation":"dissertation_contains","status":"public","id":"839"}]},"department":[{"_id":"ChWo"}],"corr_author":"1","title":"Fast approximations for boundary element based brittle fracture simulation","has_accepted_license":"1","oa_version":"Published Version","article_number":"104","intvolume":"        35","quality_controlled":"1","isi":1,"citation":{"ama":"Hahn D, Wojtan C. Fast approximations for boundary element based brittle fracture simulation. In: Vol 35. ACM; 2016. doi:<a href=\"https://doi.org/10.1145/2897824.2925902\">10.1145/2897824.2925902</a>","apa":"Hahn, D., &#38; Wojtan, C. (2016). Fast approximations for boundary element based brittle fracture simulation (Vol. 35). Presented at the ACM SIGGRAPH, Anaheim, CA, USA: ACM. <a href=\"https://doi.org/10.1145/2897824.2925902\">https://doi.org/10.1145/2897824.2925902</a>","ieee":"D. Hahn and C. Wojtan, “Fast approximations for boundary element based brittle fracture simulation,” presented at the ACM SIGGRAPH, Anaheim, CA, USA, 2016, vol. 35, no. 4.","short":"D. Hahn, C. Wojtan, in:, ACM, 2016.","mla":"Hahn, David, and Chris Wojtan. <i>Fast Approximations for Boundary Element Based Brittle Fracture Simulation</i>. Vol. 35, no. 4, 104, ACM, 2016, doi:<a href=\"https://doi.org/10.1145/2897824.2925902\">10.1145/2897824.2925902</a>.","chicago":"Hahn, David, and Chris Wojtan. “Fast Approximations for Boundary Element Based Brittle Fracture Simulation,” Vol. 35. ACM, 2016. <a href=\"https://doi.org/10.1145/2897824.2925902\">https://doi.org/10.1145/2897824.2925902</a>.","ista":"Hahn D, Wojtan C. 2016. Fast approximations for boundary element based brittle fracture simulation. ACM SIGGRAPH, ACM Transactions on Graphics, vol. 35, 104."},"volume":35,"file":[{"file_size":12453704,"file_id":"5121","relation":"main_file","date_updated":"2020-07-14T12:44:46Z","checksum":"943712d9c9dc8bb5048d4adc561d7d38","access_level":"open_access","creator":"system","date_created":"2018-12-12T10:15:04Z","content_type":"application/pdf","file_name":"IST-2016-632-v1+2_a104-hahn.pdf"}],"article_processing_charge":"No","date_updated":"2026-04-08T14:20:15Z","day":"01","ddc":["000"],"author":[{"id":"357A6A66-F248-11E8-B48F-1D18A9856A87","first_name":"David","last_name":"Hahn","full_name":"Hahn, David"},{"full_name":"Wojtan, Christopher J","last_name":"Wojtan","orcid":"0000-0001-6646-5546","first_name":"Christopher J","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87"}],"user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","publisher":"ACM","type":"conference","doi":"10.1145/2897824.2925902","scopus_import":"1","year":"2016","conference":{"location":"Anaheim, CA, USA","name":"ACM SIGGRAPH","start_date":"2016-07-24","end_date":"2016-07-28"},"oa":1,"status":"public","external_id":{"isi":["000380112400074"]},"file_date_updated":"2020-07-14T12:44:46Z","date_created":"2018-12-11T11:51:35Z","alternative_title":["ACM Transactions on Graphics"],"language":[{"iso":"eng"}]},{"volume":35,"file":[{"file_name":"IST-2016-631-v1+2_a96-bojsen-hansen.pdf","access_level":"open_access","checksum":"140b5532f0a2a006a0149cab7c73c17c","date_updated":"2020-07-14T12:44:47Z","content_type":"application/pdf","date_created":"2018-12-12T10:13:00Z","creator":"system","file_id":"4981","relation":"main_file","file_size":12422760}],"article_processing_charge":"No","date_updated":"2025-09-22T07:43:01Z","day":"11","ddc":["000"],"author":[{"id":"439F0C8C-F248-11E8-B48F-1D18A9856A87","first_name":"Morten","orcid":"0000-0002-4417-3224","last_name":"Bojsen-Hansen","full_name":"Bojsen-Hansen, Morten"},{"orcid":"0000-0001-6646-5546","first_name":"Christopher J","last_name":"Wojtan","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","full_name":"Wojtan, Christopher J"}],"user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","acknowledgement":"We thank the IST Austria Visual Computing group for helpful feedback throughout the project. ","publisher":"ACM","type":"conference","doi":"10.1145/2897824.2925963","scopus_import":"1","year":"2016","oa":1,"conference":{"end_date":"2016-07-28","name":"ACM SIGGRAPH","location":"Anaheim, CA, USA","start_date":"2016-07-24"},"status":"public","external_id":{"isi":["000380112400066"]},"file_date_updated":"2020-07-14T12:44:47Z","date_created":"2018-12-11T11:51:35Z","language":[{"iso":"eng"}],"alternative_title":["ACM Transactions on Graphics"],"pubrep_id":"631","publication_status":"published","publist_id":"5879","_id":"1363","ec_funded":1,"issue":"4","tmp":{"short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"date_published":"2016-07-11T00:00:00Z","month":"07","project":[{"call_identifier":"H2020","_id":"2533E772-B435-11E9-9278-68D0E5697425","grant_number":"638176","name":"Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large Scales"}],"abstract":[{"text":"When aiming to seamlessly integrate a fluid simulation into a larger scenario (like an open ocean), careful attention must be paid to boundary conditions. In particular, one must implement special &quot;non-reflecting&quot; boundary conditions, which dissipate out-going waves as they exit the simulation. Unfortunately, the state of the art in non-reflecting boundary conditions (perfectly-matched layers, or PMLs) only permits trivially simple inflow/outflow conditions, so there is no reliable way to integrate a fluid simulation into a more complicated environment like a stormy ocean or a turbulent river. This paper introduces the first method for combining nonreflecting boundary conditions based on PMLs with inflow/outflow boundary conditions that vary arbitrarily throughout space and time. Our algorithm is a generalization of stateof- the-art mean-flow boundary conditions in the computational fluid dynamics literature, and it allows for seamless integration of a fluid simulation into much more complicated environments. Our method also opens the door for previously-unseen postprocess effects like retroactively changing the location of solid obstacles, and locally increasing the visual detail of a pre-existing simulation.","lang":"eng"}],"department":[{"_id":"ChWo"}],"corr_author":"1","title":"Generalized non-reflecting boundaries for fluid re-simulation","has_accepted_license":"1","oa_version":"Published Version","article_number":"96","acknowledged_ssus":[{"_id":"ScienComp"}],"intvolume":"        35","quality_controlled":"1","isi":1,"citation":{"short":"M. Bojsen-Hansen, C. Wojtan, in:, ACM, 2016.","ama":"Bojsen-Hansen M, Wojtan C. Generalized non-reflecting boundaries for fluid re-simulation. In: Vol 35. ACM; 2016. doi:<a href=\"https://doi.org/10.1145/2897824.2925963\">10.1145/2897824.2925963</a>","apa":"Bojsen-Hansen, M., &#38; Wojtan, C. (2016). Generalized non-reflecting boundaries for fluid re-simulation (Vol. 35). Presented at the ACM SIGGRAPH, Anaheim, CA, USA: ACM. <a href=\"https://doi.org/10.1145/2897824.2925963\">https://doi.org/10.1145/2897824.2925963</a>","ieee":"M. Bojsen-Hansen and C. Wojtan, “Generalized non-reflecting boundaries for fluid re-simulation,” presented at the ACM SIGGRAPH, Anaheim, CA, USA, 2016, vol. 35, no. 4.","ista":"Bojsen-Hansen M, Wojtan C. 2016. Generalized non-reflecting boundaries for fluid re-simulation. ACM SIGGRAPH, ACM Transactions on Graphics, vol. 35, 96.","chicago":"Bojsen-Hansen, Morten, and Chris Wojtan. “Generalized Non-Reflecting Boundaries for Fluid Re-Simulation,” Vol. 35. ACM, 2016. <a href=\"https://doi.org/10.1145/2897824.2925963\">https://doi.org/10.1145/2897824.2925963</a>.","mla":"Bojsen-Hansen, Morten, and Chris Wojtan. <i>Generalized Non-Reflecting Boundaries for Fluid Re-Simulation</i>. Vol. 35, no. 4, 96, ACM, 2016, doi:<a href=\"https://doi.org/10.1145/2897824.2925963\">10.1145/2897824.2925963</a>."}},{"file_date_updated":"2020-07-14T12:44:53Z","date_created":"2018-12-11T11:51:52Z","language":[{"iso":"eng"}],"type":"journal_article","page":"233 - 242","doi":"10.1111/cgf.12826","scopus_import":"1","year":"2016","oa":1,"status":"public","external_id":{"isi":["000377222200022"]},"day":"27","date_updated":"2025-09-18T14:26:23Z","ddc":["000"],"author":[{"full_name":"Goldade, Ryan","last_name":"Goldade","first_name":"Ryan"},{"full_name":"Batty, Christopher","last_name":"Batty","first_name":"Christopher"},{"full_name":"Wojtan, Christopher J","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","last_name":"Wojtan","first_name":"Christopher J","orcid":"0000-0001-6646-5546"}],"user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","publisher":"Wiley-Blackwell","acknowledgement":"This research was supported by NSERC (RGPIN-04360-2014) and IST Austria. ","volume":35,"file":[{"file_name":"IST-2016-612-v1+2_Wojtan_APracticalMethod_PostPrint_2016.pdf","content_type":"application/pdf","date_created":"2018-12-12T10:13:18Z","creator":"system","checksum":"8e61387ee2e3bd0e776fbe301629bfd9","access_level":"open_access","date_updated":"2020-07-14T12:44:53Z","file_id":"5000","relation":"main_file","file_size":15873858}],"article_processing_charge":"No","intvolume":"        35","quality_controlled":"1","isi":1,"citation":{"ama":"Goldade R, Batty C, Wojtan C. A practical method for high-resolution embedded liquid surfaces. <i>Computer Graphics Forum</i>. 2016;35(2):233-242. doi:<a href=\"https://doi.org/10.1111/cgf.12826\">10.1111/cgf.12826</a>","apa":"Goldade, R., Batty, C., &#38; Wojtan, C. (2016). A practical method for high-resolution embedded liquid surfaces. <i>Computer Graphics Forum</i>. Wiley-Blackwell. <a href=\"https://doi.org/10.1111/cgf.12826\">https://doi.org/10.1111/cgf.12826</a>","ieee":"R. Goldade, C. Batty, and C. Wojtan, “A practical method for high-resolution embedded liquid surfaces,” <i>Computer Graphics Forum</i>, vol. 35, no. 2. Wiley-Blackwell, pp. 233–242, 2016.","short":"R. Goldade, C. Batty, C. Wojtan, Computer Graphics Forum 35 (2016) 233–242.","chicago":"Goldade, Ryan, Christopher Batty, and Chris Wojtan. “A Practical Method for High-Resolution Embedded Liquid Surfaces.” <i>Computer Graphics Forum</i>. Wiley-Blackwell, 2016. <a href=\"https://doi.org/10.1111/cgf.12826\">https://doi.org/10.1111/cgf.12826</a>.","mla":"Goldade, Ryan, et al. “A Practical Method for High-Resolution Embedded Liquid Surfaces.” <i>Computer Graphics Forum</i>, vol. 35, no. 2, Wiley-Blackwell, 2016, pp. 233–42, doi:<a href=\"https://doi.org/10.1111/cgf.12826\">10.1111/cgf.12826</a>.","ista":"Goldade R, Batty C, Wojtan C. 2016. A practical method for high-resolution embedded liquid surfaces. Computer Graphics Forum. 35(2), 233–242."},"title":"A practical method for high-resolution embedded liquid surfaces","publication":"Computer Graphics Forum","has_accepted_license":"1","oa_version":"Submitted Version","issue":"2","month":"05","date_published":"2016-05-27T00:00:00Z","project":[{"name":"Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large Scales","_id":"2533E772-B435-11E9-9278-68D0E5697425","grant_number":"638176","call_identifier":"H2020"}],"abstract":[{"lang":"eng","text":"Combining high-resolution level set surface tracking with lower resolution physics is an inexpensive method for achieving highly detailed liquid animations. Unfortunately, the inherent resolution mismatch introduces several types of disturbing visual artifacts. We identify the primary sources of these artifacts and present simple, efficient, and practical solutions to address them. First, we propose an unconditionally stable filtering method that selectively removes sub-grid surface artifacts not seen by the fluid physics, while preserving fine detail in dynamic splashing regions. It provides comparable results to recent error-correction techniques at lower cost, without substepping, and with better scaling behavior. Second, we show how a modified narrow-band scheme can ensure accurate free surface boundary conditions in the presence of large resolution mismatches. Our scheme preserves the efficiency of the narrow-band methodology, while eliminating objectionable stairstep artifacts observed in prior work. Third, we demonstrate that the use of linear interpolation of velocity during advection of the high-resolution level set surface is responsible for visible grid-aligned kinks; we therefore advocate higher-order velocity interpolation, and show that it dramatically reduces this artifact. While these three contributions are orthogonal, our results demonstrate that taken together they efficiently address the dominant sources of visual artifacts arising with high-resolution embedded liquid surfaces; the proposed approach offers improved visual quality, a straightforward implementation, and substantially greater scalability than competing methods."}],"department":[{"_id":"ChWo"}],"pubrep_id":"612","publist_id":"5795","publication_status":"published","_id":"1412","ec_funded":1},{"date_updated":"2025-09-18T14:25:33Z","day":"01","author":[{"full_name":"Jeschke, Stefan","id":"44D6411A-F248-11E8-B48F-1D18A9856A87","last_name":"Jeschke","first_name":"Stefan"}],"publisher":"Wiley-Blackwell","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","volume":35,"article_processing_charge":"No","date_created":"2018-12-11T11:51:53Z","language":[{"iso":"eng"}],"page":"71 - 79","type":"journal_article","scopus_import":"1","doi":"10.1111/cgf.12812","external_id":{"isi":["000377222200008"]},"status":"public","year":"2016","issue":"2","project":[{"name":"Deep Pictures: Creating Visual and Haptic Vector Images","call_identifier":"FWF","grant_number":"P 24352-N23","_id":"25357BD2-B435-11E9-9278-68D0E5697425"}],"date_published":"2016-05-01T00:00:00Z","month":"05","department":[{"_id":"ChWo"}],"abstract":[{"lang":"eng","text":"This paper generalizes the well-known Diffusion Curves Images (DCI), which are composed of a set of Bezier curves with colors specified on either side. These colors are diffused as Laplace functions over the image domain, which results in smooth color gradients interrupted by the Bezier curves. Our new formulation allows for more color control away from the boundary, providing a similar expressive power as recent Bilaplace image models without introducing associated issues and computational costs. The new model is based on a special Laplace function blending and a new edge blur formulation. We demonstrate that given some user-defined boundary curves over an input raster image, fitting colors and edge blur from the image to the new model and subsequent editing and animation is equally convenient as with DCIs. Numerous examples and comparisons to DCIs are presented."}],"publist_id":"5794","publication_status":"published","_id":"1413","intvolume":"        35","citation":{"chicago":"Jeschke, Stefan. “Generalized Diffusion Curves: An Improved Vector Representation for Smooth-Shaded Images.” <i>Computer Graphics Forum</i>. Wiley-Blackwell, 2016. <a href=\"https://doi.org/10.1111/cgf.12812\">https://doi.org/10.1111/cgf.12812</a>.","mla":"Jeschke, Stefan. “Generalized Diffusion Curves: An Improved Vector Representation for Smooth-Shaded Images.” <i>Computer Graphics Forum</i>, vol. 35, no. 2, Wiley-Blackwell, 2016, pp. 71–79, doi:<a href=\"https://doi.org/10.1111/cgf.12812\">10.1111/cgf.12812</a>.","ista":"Jeschke S. 2016. Generalized diffusion curves: An improved vector representation for smooth-shaded images. Computer Graphics Forum. 35(2), 71–79.","ieee":"S. Jeschke, “Generalized diffusion curves: An improved vector representation for smooth-shaded images,” <i>Computer Graphics Forum</i>, vol. 35, no. 2. Wiley-Blackwell, pp. 71–79, 2016.","apa":"Jeschke, S. (2016). Generalized diffusion curves: An improved vector representation for smooth-shaded images. <i>Computer Graphics Forum</i>. Wiley-Blackwell. <a href=\"https://doi.org/10.1111/cgf.12812\">https://doi.org/10.1111/cgf.12812</a>","ama":"Jeschke S. Generalized diffusion curves: An improved vector representation for smooth-shaded images. <i>Computer Graphics Forum</i>. 2016;35(2):71-79. doi:<a href=\"https://doi.org/10.1111/cgf.12812\">10.1111/cgf.12812</a>","short":"S. Jeschke, Computer Graphics Forum 35 (2016) 71–79."},"isi":1,"quality_controlled":"1","title":"Generalized diffusion curves: An improved vector representation for smooth-shaded images","corr_author":"1","publication":"Computer Graphics Forum","oa_version":"None"},{"type":"journal_article","page":"225 - 232","scopus_import":"1","doi":"10.1111/cgf.12825","external_id":{"isi":["000377222200021"]},"status":"public","oa":1,"year":"2016","file_date_updated":"2020-07-14T12:44:53Z","date_created":"2018-12-11T11:51:53Z","language":[{"iso":"eng"}],"volume":35,"article_processing_charge":"No","file":[{"date_updated":"2020-07-14T12:44:53Z","checksum":"984afbe510ed48019025dff1dcc7baad","access_level":"open_access","creator":"system","content_type":"application/pdf","date_created":"2018-12-12T10:12:22Z","file_name":"IST-2016-611-v1+3_CW_nbflip_postprint_2016.pdf","file_size":5938324,"file_id":"4940","relation":"main_file"}],"ddc":["000"],"day":"01","date_updated":"2025-09-18T14:25:04Z","author":[{"full_name":"Ferstl, Florian","first_name":"Florian","last_name":"Ferstl"},{"last_name":"Ando","first_name":"Ryoichi","full_name":"Ando, Ryoichi"},{"full_name":"Wojtan, Christopher J","last_name":"Wojtan","first_name":"Christopher J","orcid":"0000-0001-6646-5546","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Westermann","first_name":"Rüdiger","full_name":"Westermann, Rüdiger"},{"last_name":"Thuerey","first_name":"Nils","full_name":"Thuerey, Nils"}],"publisher":"Wiley-Blackwell","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","title":"Narrow band FLIP for liquid simulations","has_accepted_license":"1","publication":"Computer Graphics Forum","oa_version":"Submitted Version","intvolume":"        35","citation":{"short":"F. Ferstl, R. Ando, C. Wojtan, R. Westermann, N. Thuerey, Computer Graphics Forum 35 (2016) 225–232.","ama":"Ferstl F, Ando R, Wojtan C, Westermann R, Thuerey N. Narrow band FLIP for liquid simulations. <i>Computer Graphics Forum</i>. 2016;35(2):225-232. doi:<a href=\"https://doi.org/10.1111/cgf.12825\">10.1111/cgf.12825</a>","ieee":"F. Ferstl, R. Ando, C. Wojtan, R. Westermann, and N. Thuerey, “Narrow band FLIP for liquid simulations,” <i>Computer Graphics Forum</i>, vol. 35, no. 2. Wiley-Blackwell, pp. 225–232, 2016.","apa":"Ferstl, F., Ando, R., Wojtan, C., Westermann, R., &#38; Thuerey, N. (2016). Narrow band FLIP for liquid simulations. <i>Computer Graphics Forum</i>. Wiley-Blackwell. <a href=\"https://doi.org/10.1111/cgf.12825\">https://doi.org/10.1111/cgf.12825</a>","ista":"Ferstl F, Ando R, Wojtan C, Westermann R, Thuerey N. 2016. Narrow band FLIP for liquid simulations. Computer Graphics Forum. 35(2), 225–232.","mla":"Ferstl, Florian, et al. “Narrow Band FLIP for Liquid Simulations.” <i>Computer Graphics Forum</i>, vol. 35, no. 2, Wiley-Blackwell, 2016, pp. 225–32, doi:<a href=\"https://doi.org/10.1111/cgf.12825\">10.1111/cgf.12825</a>.","chicago":"Ferstl, Florian, Ryoichi Ando, Chris Wojtan, Rüdiger Westermann, and Nils Thuerey. “Narrow Band FLIP for Liquid Simulations.” <i>Computer Graphics Forum</i>. Wiley-Blackwell, 2016. <a href=\"https://doi.org/10.1111/cgf.12825\">https://doi.org/10.1111/cgf.12825</a>."},"isi":1,"quality_controlled":"1","publication_status":"published","publist_id":"5793","pubrep_id":"611","_id":"1415","issue":"2","month":"05","date_published":"2016-05-01T00:00:00Z","department":[{"_id":"ChWo"}],"abstract":[{"text":"The Fluid Implicit Particle method (FLIP) for liquid simulations uses particles to reduce numerical dissipation and provide important visual cues for events like complex splashes and small-scale features near the liquid surface. Unfortunately, FLIP simulations can be computationally expensive, because they require a dense sampling of particles to fill the entire liquid volume. Furthermore, the vast majority of these FLIP particles contribute nothing to the fluid's visual appearance, especially for larger volumes of liquid. We present a method that only uses FLIP particles within a narrow band of the liquid surface, while efficiently representing the remaining inner volume on a regular grid. We show that a naïve realization of this idea introduces unstable and uncontrollable energy fluctuations, and we propose a novel coupling scheme between FLIP particles and regular grid which overcomes this problem. Our method drastically reduces the particle count and simulation times while yielding results that are nearly indistinguishable from regular FLIP simulations. Our approach is easy to integrate into any existing FLIP implementation.","lang":"eng"}]},{"datarep_id":"48","article_processing_charge":"No","_id":"5558","file":[{"file_name":"IST-2016-48-v1+1_2016_Bojsen-Hansen_TCaAWSW.tar.bz2","content_type":"application/x-bzip2","date_created":"2018-12-12T13:02:18Z","creator":"system","access_level":"open_access","checksum":"5b1b256ad796fbddb4b7729f5e45e444","date_updated":"2020-07-14T12:47:02Z","file_id":"5589","relation":"main_file","file_size":55237885}],"publist_id":"6238","pubrep_id":"640","department":[{"_id":"ChWo"}],"publisher":"Institute of Science and Technology Austria","related_material":{"record":[{"id":"1122","status":"public","relation":"other"}]},"abstract":[{"text":"PhD thesis LaTeX source code","lang":"eng"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","month":"09","date_published":"2016-09-23T00:00:00Z","author":[{"full_name":"Bojsen-Hansen, Morten","last_name":"Bojsen-Hansen","orcid":"0000-0002-4417-3224","first_name":"Morten","id":"439F0C8C-F248-11E8-B48F-1D18A9856A87"}],"day":"23","tmp":{"short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"date_updated":"2026-04-08T14:24:05Z","ddc":["004"],"status":"public","year":"2016","oa":1,"doi":"10.15479/AT:ISTA:48","oa_version":"Published Version","has_accepted_license":"1","type":"research_data","title":"Tracking, Correcting and Absorbing Water Surface Waves","citation":{"mla":"Bojsen-Hansen, Morten. <i>Tracking, Correcting and Absorbing Water Surface Waves</i>. Institute of Science and Technology Austria, 2016, doi:<a href=\"https://doi.org/10.15479/AT:ISTA:48\">10.15479/AT:ISTA:48</a>.","chicago":"Bojsen-Hansen, Morten. “Tracking, Correcting and Absorbing Water Surface Waves.” Institute of Science and Technology Austria, 2016. <a href=\"https://doi.org/10.15479/AT:ISTA:48\">https://doi.org/10.15479/AT:ISTA:48</a>.","ista":"Bojsen-Hansen M. 2016. Tracking, Correcting and Absorbing Water Surface Waves, Institute of Science and Technology Austria, <a href=\"https://doi.org/10.15479/AT:ISTA:48\">10.15479/AT:ISTA:48</a>.","ama":"Bojsen-Hansen M. Tracking, Correcting and Absorbing Water Surface Waves. 2016. doi:<a href=\"https://doi.org/10.15479/AT:ISTA:48\">10.15479/AT:ISTA:48</a>","ieee":"M. Bojsen-Hansen, “Tracking, Correcting and Absorbing Water Surface Waves.” Institute of Science and Technology Austria, 2016.","apa":"Bojsen-Hansen, M. (2016). Tracking, Correcting and Absorbing Water Surface Waves. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT:ISTA:48\">https://doi.org/10.15479/AT:ISTA:48</a>","short":"M. Bojsen-Hansen, (2016)."},"date_created":"2018-12-12T12:31:31Z","file_date_updated":"2020-07-14T12:47:02Z"},{"file_date_updated":"2020-07-14T12:45:07Z","date_created":"2018-12-11T11:53:08Z","language":[{"iso":"eng"}],"type":"conference","scopus_import":"1","doi":"10.1145/2766933","status":"public","external_id":{"isi":["000358786600074"]},"year":"2015","conference":{"start_date":"2015-08-09","name":"SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques","location":"Los Angeles, CA, United States","end_date":"2015-08-13"},"oa":1,"day":"27","ddc":["000"],"date_updated":"2025-09-23T09:26:17Z","author":[{"full_name":"Guerrero, Paul","last_name":"Guerrero","first_name":"Paul"},{"full_name":"Jeschke, Stefan","id":"44D6411A-F248-11E8-B48F-1D18A9856A87","last_name":"Jeschke","first_name":"Stefan"},{"full_name":"Wimmer, Michael","first_name":"Michael","last_name":"Wimmer"},{"last_name":"Wonka","first_name":"Peter","full_name":"Wonka, Peter"}],"acknowledgement":"This publication is based upon work supported by the KAUST Office of Competitive Research Funds (OCRF) under Award No. 62140401, the KAUST Visual Computing Center and the Austrian Science Fund (FWF) projects DEEP PICTURES (no. P24352-N23) and Data-Driven Procedural Modeling of Interiors (no. P24600-N23).","publisher":"ACM","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","volume":34,"article_processing_charge":"No","file":[{"file_name":"IST-2016-576-v1+1_guerrero-2015-lsp-paper.pdf","date_created":"2018-12-12T10:07:49Z","content_type":"application/pdf","creator":"system","checksum":"8b05a51e372c9b0b5af9a00098a9538b","access_level":"open_access","date_updated":"2020-07-14T12:45:07Z","file_id":"4647","relation":"main_file","file_size":11902290}],"intvolume":"        34","citation":{"mla":"Guerrero, Paul, et al. <i>Learning Shape Placements by Example</i>. Vol. 34, no. 4, 108, ACM, 2015, doi:<a href=\"https://doi.org/10.1145/2766933\">10.1145/2766933</a>.","chicago":"Guerrero, Paul, Stefan Jeschke, Michael Wimmer, and Peter Wonka. “Learning Shape Placements by Example,” Vol. 34. ACM, 2015. <a href=\"https://doi.org/10.1145/2766933\">https://doi.org/10.1145/2766933</a>.","ista":"Guerrero P, Jeschke S, Wimmer M, Wonka P. 2015. Learning shape placements by example. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques vol. 34, 108.","ama":"Guerrero P, Jeschke S, Wimmer M, Wonka P. Learning shape placements by example. In: Vol 34. ACM; 2015. doi:<a href=\"https://doi.org/10.1145/2766933\">10.1145/2766933</a>","apa":"Guerrero, P., Jeschke, S., Wimmer, M., &#38; Wonka, P. (2015). Learning shape placements by example (Vol. 34). Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States: ACM. <a href=\"https://doi.org/10.1145/2766933\">https://doi.org/10.1145/2766933</a>","ieee":"P. Guerrero, S. Jeschke, M. Wimmer, and P. Wonka, “Learning shape placements by example,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States, 2015, vol. 34, no. 4.","short":"P. Guerrero, S. Jeschke, M. Wimmer, P. Wonka, in:, ACM, 2015."},"isi":1,"quality_controlled":"1","title":"Learning shape placements by example","has_accepted_license":"1","oa_version":"Submitted Version","article_number":"108","issue":"4","project":[{"name":"Deep Pictures: Creating Visual and Haptic Vector Images","call_identifier":"FWF","_id":"25357BD2-B435-11E9-9278-68D0E5697425","grant_number":"P 24352-N23"}],"date_published":"2015-07-27T00:00:00Z","month":"07","department":[{"_id":"ChWo"}],"abstract":[{"lang":"eng","text":"We present a method to learn and propagate shape placements in 2D polygonal scenes from a few examples provided by a user. The placement of a shape is modeled as an oriented bounding box. Simple geometric relationships between this bounding box and nearby scene polygons define a feature set for the placement. The feature sets of all example placements are then used to learn a probabilistic model over all possible placements and scenes. With this model, we can generate a new set of placements with similar geometric relationships in any given scene. We introduce extensions that enable propagation and generation of shapes in 3D    scenes, as well as the application of a learned modeling session to large scenes without additional user interaction. These concepts allow us to generate complex scenes with thousands of objects with relatively little user interaction."}],"publication_status":"published","publist_id":"5525","pubrep_id":"576","_id":"1630"},{"file":[{"relation":"main_file","file_id":"4909","file_size":21831121,"file_name":"IST-2016-610-v1+1_vecpotential.pdf","date_updated":"2020-07-14T12:45:07Z","checksum":"7a9afdfaba9209157ce19376e15bc90b","access_level":"open_access","creator":"system","content_type":"application/pdf","date_created":"2018-12-12T10:11:52Z"}],"article_processing_charge":"No","volume":34,"user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","acknowledgement":"The first author was supported by a JSPS Postdoctoral Fellowship for Research Abroad. This work was also supported by the ERC projects ERC-2014-StG-637014 realFlow and ERC-2014- StG-638176 BigSplash.","publisher":"ACM","author":[{"full_name":"Ando, Ryoichi","first_name":"Ryoichi","last_name":"Ando"},{"first_name":"Nils","last_name":"Thuerey","full_name":"Thuerey, Nils"},{"first_name":"Christopher J","orcid":"0000-0001-6646-5546","last_name":"Wojtan","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","full_name":"Wojtan, Christopher J"}],"day":"27","date_updated":"2025-09-23T07:27:29Z","ddc":["000"],"oa":1,"conference":{"end_date":"2015-08-13","name":"SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques","start_date":"2015-08-09","location":"Los Angeles, CA, USA"},"year":"2015","external_id":{"isi":["000358786600019"]},"status":"public","doi":"10.1145/2766935","scopus_import":"1","type":"conference","language":[{"iso":"eng"}],"alternative_title":["ACM Transactions on Graphics"],"date_created":"2018-12-11T11:53:09Z","file_date_updated":"2020-07-14T12:45:07Z","_id":"1632","pubrep_id":"610","publication_status":"published","publist_id":"5523","abstract":[{"lang":"eng","text":"This paper presents a liquid simulation technique that enforces the incompressibility condition using a stream function solve instead of a pressure projection. Previous methods have used stream function techniques for the simulation of detailed single-phase flows, but a formulation for liquid simulation has proved elusive in part due to the free surface boundary conditions. In this paper, we introduce a stream function approach to liquid simulations with novel boundary conditions for free surfaces, solid obstacles, and solid-fluid coupling.\r\n\r\nAlthough our approach increases the dimension of the linear system necessary to enforce incompressibility, it provides interesting and surprising benefits. First, the resulting flow is guaranteed to be divergence-free regardless of the accuracy of the solve. Second, our free-surface boundary conditions guarantee divergence-free motion even in the un-simulated air phase, which enables two-phase flow simulation by only computing a single phase. We implemented this method using a variant of FLIP simulation which only samples particles within a narrow band of the liquid surface, and we illustrate the effectiveness of our method for detailed two-phase flow simulations with complex boundaries, detailed bubble interactions, and two-way solid-fluid coupling."}],"department":[{"_id":"ChWo"}],"date_published":"2015-07-27T00:00:00Z","month":"07","issue":"4","article_number":"53","oa_version":"Submitted Version","has_accepted_license":"1","title":"A stream function solver for liquid simulations","quality_controlled":"1","citation":{"chicago":"Ando, Ryoichi, Nils Thuerey, and Chris Wojtan. “A Stream Function Solver for Liquid Simulations,” Vol. 34. ACM, 2015. <a href=\"https://doi.org/10.1145/2766935\">https://doi.org/10.1145/2766935</a>.","mla":"Ando, Ryoichi, et al. <i>A Stream Function Solver for Liquid Simulations</i>. Vol. 34, no. 4, 53, ACM, 2015, doi:<a href=\"https://doi.org/10.1145/2766935\">10.1145/2766935</a>.","ista":"Ando R, Thuerey N, Wojtan C. 2015. A stream function solver for liquid simulations. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, ACM Transactions on Graphics, vol. 34, 53.","apa":"Ando, R., Thuerey, N., &#38; Wojtan, C. (2015). A stream function solver for liquid simulations (Vol. 34). Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, USA: ACM. <a href=\"https://doi.org/10.1145/2766935\">https://doi.org/10.1145/2766935</a>","ieee":"R. Ando, N. Thuerey, and C. Wojtan, “A stream function solver for liquid simulations,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, USA, 2015, vol. 34, no. 4.","ama":"Ando R, Thuerey N, Wojtan C. A stream function solver for liquid simulations. In: Vol 34. ACM; 2015. doi:<a href=\"https://doi.org/10.1145/2766935\">10.1145/2766935</a>","short":"R. Ando, N. Thuerey, C. Wojtan, in:, ACM, 2015."},"isi":1,"intvolume":"        34"},{"language":[{"iso":"eng"}],"date_created":"2018-12-11T11:53:09Z","file_date_updated":"2020-07-14T12:45:07Z","external_id":{"isi":["000358786600117"]},"status":"public","oa":1,"conference":{"start_date":"2015-08-09","location":"Los Angeles, CA, United States","name":"SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques","end_date":"2015-08-13"},"year":"2015","scopus_import":"1","doi":"10.1145/2766896","type":"conference","publisher":"ACM","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","author":[{"last_name":"Hahn","first_name":"David","id":"357A6A66-F248-11E8-B48F-1D18A9856A87","full_name":"Hahn, David"},{"id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","last_name":"Wojtan","orcid":"0000-0001-6646-5546","first_name":"Christopher J","full_name":"Wojtan, Christopher J"}],"ddc":["000"],"date_updated":"2026-04-08T14:20:15Z","day":"27","article_processing_charge":"No","file":[{"file_id":"5131","relation":"main_file","file_size":20154270,"file_name":"IST-2016-609-v1+1_FractureBEM.pdf","date_updated":"2020-07-14T12:45:07Z","access_level":"open_access","checksum":"955aee971983f6b6152bcc1c9b4a7c20","creator":"system","date_created":"2018-12-12T10:15:13Z","content_type":"application/pdf"}],"volume":34,"citation":{"ista":"Hahn D, Wojtan C. 2015. High-resolution brittle fracture simulation with boundary elements. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques vol. 34, 151.","chicago":"Hahn, David, and Chris Wojtan. “High-Resolution Brittle Fracture Simulation with Boundary Elements,” Vol. 34. ACM, 2015. <a href=\"https://doi.org/10.1145/2766896\">https://doi.org/10.1145/2766896</a>.","mla":"Hahn, David, and Chris Wojtan. <i>High-Resolution Brittle Fracture Simulation with Boundary Elements</i>. Vol. 34, no. 4, 151, ACM, 2015, doi:<a href=\"https://doi.org/10.1145/2766896\">10.1145/2766896</a>.","short":"D. Hahn, C. Wojtan, in:, ACM, 2015.","ieee":"D. Hahn and C. Wojtan, “High-resolution brittle fracture simulation with boundary elements,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States, 2015, vol. 34, no. 4.","apa":"Hahn, D., &#38; Wojtan, C. (2015). High-resolution brittle fracture simulation with boundary elements (Vol. 34). Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States: ACM. <a href=\"https://doi.org/10.1145/2766896\">https://doi.org/10.1145/2766896</a>","ama":"Hahn D, Wojtan C. High-resolution brittle fracture simulation with boundary elements. In: Vol 34. ACM; 2015. doi:<a href=\"https://doi.org/10.1145/2766896\">10.1145/2766896</a>"},"isi":1,"quality_controlled":"1","intvolume":"        34","article_number":"151","oa_version":"Submitted Version","has_accepted_license":"1","title":"High-resolution brittle fracture simulation with boundary elements","corr_author":"1","department":[{"_id":"ChWo"}],"related_material":{"record":[{"id":"839","relation":"dissertation_contains","status":"public"}]},"abstract":[{"lang":"eng","text":"We present a method for simulating brittle fracture under the assumptions of quasi-static linear elastic fracture mechanics (LEFM). Using the boundary element method (BEM) and Lagrangian crack-fronts, we produce highly detailed fracture surfaces. The computational cost of the BEM is alleviated by using a low-resolution mesh and interpolating the resulting stress intensity factors when propagating the high-resolution crack-front.\r\n\r\nOur system produces physics-based fracture surfaces with high spatial and temporal resolution, taking spatial variation of material toughness and/or strength into account. It also allows for crack initiation to be handled separately from crack propagation, which is not only more reasonable from a physics perspective, but can also be used to control the simulation.\r\n\r\nSeparating the resolution of the crack-front from the resolution of the computational mesh increases the efficiency and therefore the amount of visual detail on the resulting fracture surfaces. The BEM also allows us to re-use previously computed blocks of the system matrix."}],"project":[{"name":"Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large Scales","grant_number":"638176","_id":"2533E772-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"}],"date_published":"2015-07-27T00:00:00Z","month":"07","issue":"4","ec_funded":1,"_id":"1633","publication_status":"published","publist_id":"5522","pubrep_id":"609"}]