# Conference Papers

- J. Y. Zhang and M. Ohsaki, Generation of planar quadrilateral mesh using tensegrity model, Proc. IASS Symposium 2024, Zurich, Switzerland, Int. Assoc. Shell and Spatial Struct., Paper No. 111, 2024.
- K. Hayakawa and M. Ohsaki, Origami-based flat foldable structure with non-flat singular point of rigid folding mechanism, Proc. IASS Symposium 2024, Zurich, Switzerland, Int. Assoc. Shell and Spatial Struct., Paper No. 133, 2024.
- K. Kabaki, K. Hayakawa, M. Ohsaki, Y. Jikumaru and Y. Yokosuka, Design of gridshells consisting of planar curves using Laguerre geometry, Proc. IASS Symposium 2024, Zurich, Switzerland, Int. Assoc. Shell and Spatial Struct., Paper No. 340, 2024.
- R. Watada and M. Ohsaki, Sequential generation method for hexagonal lattice shells with edge offset mesh, Proc. IASS Symposium 2024, Zurich, Switzerland, Int. Assoc. Shell and Spatial Struct., Paper No. 365, 2024.
- Z. He, K. Hayakawa and M. Ohsaki, When will the existence of a non-trivial state guarantee a continuous motion for a quad-mesh rigid origami?, Proc. 8th International Meeting on Origami in Science, Mathematics and Education (8OSME), Melbourne, Australia, 2024.
- K. Hayakawa and M. Ohsaki, Shape optimization of rigid origami for approximate self-foldability under gravity, Proc. 8th International Meeting on Origami in Science, Mathematics and Education (8OSME), Melbourne, Australia, 2024.
- T. Oba, K. Hayakawa and M. Ohsaki, Higher-order inﬁnitesimal mechanism of rigid origami and polynomial approximation of its folding path, Proc. 8th International Meeting on Origami in Science, Mathematics and Education (8OSME), Melbourne, Australia, 2024.
- M. Ohsaki, K. Hayakawa and J. Y. Zhang, Non-parametric structural shape optimization of piecewise developable surfaces using discrete differential geometry, Proc. Asian Congress of Structural and Multidisciplinary Optimization (ACSMO 2024), Zhengzhou, China, Paper B40314, 2024.
- T. Matsuoka, M. Ohsaki and K. Hayashi, Topology optimization of periodic lattice structures for specified mechanical properties considering member connectivity, Proc. Asian Congress of Structural and Multidisciplinary Optimization (ACSMO 2024), Zhengzhou, China, Paper B60370, 2024.
- M. Ohsaki, K. Hayakawa and J. Y. Zhang, Nonparametric shape optimization of piecewise developable surfaces for maximum stiffness using discrete differential geometry, Proc. IASS Symposium 2023, Melbourne, Australia, Int. Assoc. Shell and Spatial Struct., pp. 1452-1456, 2023.
- T. Nakajima and M. Ohsaki, Form finding and structural analysis of free-form shells with specified horizontal projected stress distribution, Proc. IASS Symposium 2023, Melbourne, Australia, Int. Assoc. Shell and Spatial Struct., pp. 1351-1360, 2023.
- C. Kupwiwat, K. Hayashi and M. Ohsaki, Sizing optimization of free-form lattice shells using deep deterministic policy gradient and graph convolutional networks, Proc. IASS Symposium 2023, Melbourne, Australia, Int. Assoc. Shell and Spatial Struct., pp. 1458-1468, 2023.
- R. Watada and M. Ohsaki, Shape generation of hexagonal lattice shell consisting of edge offset mesh Proc. IASS Symposium 2023, Melbourne, Australia, Int. Assoc. Shell and Spatial Struct., pp. 244-250, 2023.
- K. Hayashi and M. Ohsaki, Isogeometric deep learning framework to predict the structural performance of free-form surfaces, Proc. IASS Symposium 2023, Melbourne, Australia, Int. Assoc. Shell and Spatial Struct., pp. 1361-1369, 2023.
- M. Ohsaki, K. Hayashi, Y. Jikumaru, T. Kagaya and Y. Yokosuka,Gaussian curvature flow for constant Gaussian curvature surface with triangular mesh, Proc. IASS 2022 and APCS 2022, Beijing, Int. Assoc. Shell and Spatial Struct., Paper ID 28, pp. 1847-1855, 2022.
- Y. Sakai and M. Ohsaki, A shape design method of discrete cylindrical structures tiled with auxetic hexagonal units, Proc. IASS 2022 and APCS 2022, Beijing, Int. Assoc. Shell and Spatial Struct., Paper ID 116, pp. 1924-1935, 2022.
- K. Hayakawa and M. Ohsaki, Form generation of rigid origami reflecting the mean curvature and feature lines of target surface, Proc. IASS 2022 and APCS 2022, Beijing, Int. Assoc. Shell and Spatial Struct., Paper ID 225, pp. 2382--2393, 2022.
- R. Watada and M. Ohsaki, Design of N-fold-symmetric multi-layered hinge frame deployable from bundle to arbitrary surface of revolution, Proc. IASS 2022 and APCS 2022, Beijing, Int. Assoc. Shell and Spatial Struct., Paper ID 74, pp. 2294-2301, 2022.
- J. Y. Zhang and M. Ohsaki, An efficient method for design of discrete developable surfaces by Ricci flow, Proc. IASS Symposium 2021, Surrey, UK, Int. Assoc. Shell and Spatial Struct., pp. 2096-2101, 2021.
- J. Cui, Y. Luo and M. Ohsaki, Morphological research on developable free-form surface structure composed of plates, Proc. IASS Symposium 2021, Surrey, UK, Int. Assoc. Shell and Spatial Struct., pp. 2525-2531, 2021.
- S. Fujita and M. Ohsaki, Development of OpenSees component for Grasshopper for various types of computational morphogenesis, Proc. IASS Symposium 2021, Surrey, UK,Int. Assoc. Shell and Spatial Struct., pp. 2194-2204, 2021.
- K. Hayakawa and M. Ohsaki, Form generation of rigid origami by multiobjective optimization for approximating curved surface, Proc. IASS Symposium 2021, Surrey, UK, Int. Assoc. Shell and Spatial Struct., pp. 2743-2754, 2021.
- Y. Yokosuka, J. Inoguchi, M. Ohsaki and T. Honma, Gridshell structures with discrete curvature lines: Modelling technique and evaluation of mechanical performance, Proc. IASS Symposium 2021, Surrey, UK, Int. Assoc. Shell and Spatial Struct., pp. 821-833, 2021.
- K. Hayashi and M. Ohsaki, Reinforcement learning for optimal topology design of 3D trusses, Proc. IASS Symposium 2021, Surrey, UK, Int. Assoc. Shell and Spatial Struct., pp. 2261-2273, 2021.
- M. Ohsaki and K. Hayakawa, Non-parametric shape design of free-form shells using fairness metrics and discrete differential geometry, Proc. IASS Symposium 2021, Surrey, UK, Int. Assoc. Shell and Spatial Struct., pp. 2474-2479, 2021.
- M. Yamakawa and M. Ohsaki, Fail-safe topology optimization via order statistics with stochastic gradient descent, Proc. Asian Congress of Structural and Multidisciplinary Optimization (ACSMO 2020), Online, Paper W1D-2, pp. 254-259, 2020.
- M. Ohsaki, T. Mikami, H. Tagawa and J. Fujiwara, Topology optimization of latticed steel wall with contact to existing beams and columns of RC frame, Proc. 17th World Conf. on Earthquake Eng. (17WCEE), Sendai, Japan, Paper No. 2c-0067, 2020.
- J. Takagi and M. Ohsaki, Comparison of sperior steel building design solutions for different lateral frame systems and column shapes, Proc. 17th World Conf. on Earthquake Eng. (17WCEE), Sendai, Japan, Paper No. 2c-0085, 2020.
- Y. Kanno, M. Ohsaki and J. K. Guest, Unified treatment of some different fabrication-cost functions in truss topology optimization, Proc. IASS Symposium 2019, Barcelona, Spain, Int. Assoc. Shell and Spatial Struct., pp. 2100--2107, Paper No. 166, 2019.
- M. Ohsaki, J. Y. Zhang, K. Kogiso and J. J. Rimoli, Optimization of tensegrity lattice with truncated octahedral units, Proc. IASS Symposium 2019, Barcelona, Spain, Int. Assoc. Shell and Spatial Struct., pp. 658--665, Paper No. 186, 2019.
- K. Hayakawa and M. Ohsaki, Frame model for analysis and form generation of rigid origami for deployable roof structures, Proc. IASS Symposium 2019, Barcelona, Spain, Int. Assoc. Shell and Spatial Struct., pp. 1061--1068, Paper No. 177, 2019.
- K. Hayakawa and M. Ohsaki, Optimization approach to form generation of rigid-foldable origami for deployable roof structure, Proc. 13th World Congress of Structural and Multidisciplinary Optimization (WCSMO13), Beijing, Paper No. A050332, 2019.
- R. Watada, M. Ohsaki and Y. Kanno, Group theoretic approach to detecting finite mechanisms of bar-hinge models of retractable structures, Proc. 12th Asian Pacific Conf. on Shell and Spatial Struct. (APCS 2018), pp. 165-173, 2018.
- M. Ohsaki, T. Kimura and Y. Otsuka, Optimization of support structure for reduction of reaction force of roof of a school gymnasium, Proc. 12th Asian Pacific Conf. on Shell and Spatial Struct. (APCS 2018), pp. 348-353, 2018.
- K. Hayashi and M. Ohsaki, Structural performance of triangular latticed shells with regularized panels for Bezier design surface, Proc. 12th Asian Pacific Conf. on Shell and Spatial Struct. (APCS 2018), pp. 337-347, 2018.
- T. Kimura, M. Ohsaki and Y. Yamaoka, Shape and topology optimization of shear wall considering of latticed blocks, Proc. IASS Symposium 2018, Boston, USA, Int. Assoc. Shell and Spatial Struct., Paper No. 234, 2018.
- J. Zhang and M. Ohsaki, Free-form design of tensegrity -- inspired by Slelson's works, Proc. IASS Symposium 2018, Boston, USA, Int. Assoc. Shell and Spatial Struct., Paper No. 42, 2018.
- Y. Sakai and M. Ohsaki, Approximate shape design of gridshells using spatial elastica, Proc. IASS Symposium 2018, Boston, USA, Int. Assoc. Shell and Spatial Struct., Paper No. 143, 2018.
- M. Ohsaki, K. Hayashi and C. Mueller, FDMOPT: A new tool for simultaneous optimization of geometry and topology of truss structures, Proc. IASS Symposium 2018, Boston, USA, Int. Assoc. Shell and Spatial Struct., Paper No. 249, 2018.
- R. Watada and M. Ohsaki, Series expansion of regular 2N-gonal frame with inclined joints foldable into straight shape, Proc. IASS Symposium 2018, Boston, USA, Int. Assoc. Shell and Spatial Struct., Paper No. 270, 2018.
- K. Hayashi and M. Ohsaki, Regularization of latticed shell panels for Bezier surfaces, Proc. IASS Symposium 2018, Boston, USA, Int. Assoc. Shell and Spatial Struct., Paper No. 088 2018.
- Q. Ma, M. Ohsaki, Z. Chen and X. Yan, Step-bystep unbalanced force iteration for asymmetric cable dome structures, Proc. IASS Symposium 2018, Boston, USA, Int. Assoc. Shell and Spatial Struct., Paper No. 252, 2018.
- K. Watanabe, M. Yamakawa, K. Yamada and M. Ohsaki, Robust design optimization of moment-registing steel frame considering uncertain properties of surface ground based on order statistics, Proc. Asian Congress of Structural and Multidisciplinary Optimization (ACSMO 2018), Dalian, China, Paper No. A030071, 2018.
- K. Hayashi, M. Ohsaki and C. Mueller, Force density method for simultaneous optimization of geometry and topology of spatial trusses, Proc. IASS Symposium 2017, Hamburg, Germany, Int. Assoc. Shell and Spatial Struct., Paper No. 9493, 2017.
- M. Ohsaki, S. Saburi and F. Takeda, Approximate method for cutting pattern optimization of membrane structures, Proc. IASS Symposium 2017, Hamburg, Germany, Int. Assoc. Shell and Spatial Struct., Paper No. 9503, 2017.
- J. Y. Zhang, M. Ohsaki and Z. Li, Optimization of large-scale transmission tower using simulated annealing, Proc. IASS Symposium 2017, Hamburg, Germany, Int. Assoc. Shell and Spatial Struct., Paper No. 9554, 2017.
- Y. Sakai and M. Ohsaki, Discrete elastica model for shape design of grid shells, Proc. IASS Symposium 2017, Hamburg, Germany, Int. Assoc. Shell and Spatial Struct., Paper No. 9557, 2017.
- J. Cui and M. Ohsaki, An optimization method for generating self-equilibrium shape of curved surface from developable surface, Proc. IASS Symposium 2017, Hamburg, Germany, Int. Assoc. Shell and Spatial Struct., Paper No. 9574, 2017.
- Y. Miyazu, M. Ohsaki and S. Tsusa, Topology optimization of supporting structures for seismic response reduction of spatial structures, Proc. IASS Symposium 2016, Tokyo, Int. Assoc. Shell and Spatial Struct., Paper No. CS1F-1069, 2016.
- K. Nakamura, M. Ohsaki and J. Cui, Shape optimization of free-form shells consisting of developable surfaces, Proc. IASS Symposium 2016, Tokyo, Int. Assoc. Shell and Spatial Struct., Paper No. CS2E-1057, 2016.
- J. Cui, G. Zhou and M. Ohsaki, Design of tree-type support structure of free-form shell generated using fractal geometry, Proc. IASS Symposium 2016, Tokyo, Int. Assoc. Shell and Spatial Struct., Paper No. CS3Y-1031, 2016.
- R. Watada and M. Ohsaki, Series expansion method for determination of order of mechanism with partially rigid joints, Proc. IASS Symposium 2016, Tokyo, Int. Assoc. Shell and Spatial Struct., Paper No. CS5G-1330, 2016.
- M. Ohsaki, K. Seki and Y. Miyazu, Optimization of locations of slot connections of gridshells modeled using elastica, Proc. IASS Symposium 2016, Tokyo, Int. Assoc. Shell and Spatial Struct., Paper No. CS5A-1012, 2016.
- S, Fujita, M. Ohsaki and K. Seki, Shape optimization of latticed shells consisting of ruled surface, Proc. IASS Symposium 2016, Tokyo, Int. Assoc. Shell and Spatial Struct., Paper No. CS6M-1251, 2016.
- M. Yamakawa and M. Ohsaki, Worst-case analysis with linear constraints based on the k-th order statistics, Proc. Asian Congress of Structural and Multidisciplinary Optimization (ACSMO 2016), Nagasaki, Japan, Paper No. 3E-1, 2016.
- Y. Yamaoka, M. Ohsaki and Y.b Kanno, Optimization approach to design of linkage mechanisms with arbitrarily inclined hinges, Proc. Asian Congress of Structural and Multidisciplinary Optimization (ACSMO 2016), Nagasaki, Japan, Paper No. 1D2-3, 2016.
- J. Takagi and M. Ohsaki, Simulated annealing for evaluation of structural characteristics of steel buildings with different lateral frame systems, Proc. Asian Congress of Structural and Multidisciplinary o Otimization (ACSMO 2016), Nagasaki, Japan, Paper No. 2D3-4, 2016.
- Y.Miyazu, A.Itou, S.Soda and M.Ohsaki, Seismic response control of buildings using mechanical linkages with passive dampers, Proc. Tenth Pacific Conference on Earthquake Engineering, Sydney, Australia, Paper No. 49, 2015.
- M. Ohsaki, Y. Miyazu, S. Tomoda and S. Tsusa, Design of deployable structures using limit analysis of partially rigid frames with quadratic yield functions, Proc. IASS Symposium 2015, Amsterdam, Netherlands, Int. Assoc. Shell and Spatial Struct., Paper No. 498683, 2015.
- S. Tsuda, Y. Nakahara and M. Ohsaki, Deployable bar structure with partially rigid connection developed from origami, Proc. IASS Symposium 2015, Amsterdam, Netherlands, Int. Assoc. Shell and Spatial Struct., Paper No. 500881, 2015.
- T. Mikami, M. Ohsaki and K. Fukushima, Shape optimization of latticed blocks for seismic retrofit of building frames, Proc. IABSE Conference Nara 2015, Int. Assoc., Bridge and Struct. Eng., Paper No. IA-10, 2015.
- K. Seki, M. Ohsaki and S. Fujita, Shape optimization of ruled surface considering static stiffness, Proc. 11th Asian Pacific Conf. on Shell and Spatial Struct (APCS 2015), pp. 269-274, 2015.
- J. Y. Zhang and M. Ohsaki, Free-form design of tensegrity structures by combination of non-linear analysis and optimization techniques, Proc. 11th Asian Pacific Conf. on Shell and Spatial Struct (APCS 2015), pp. 339-344, 2015.
- A. Matsuo, M. Ohsaki, Y. Miyazu, Optimization of elastically deformed gridshell with partially released joints, Proc. IASS WG. 12+18 International Colloquium 2015, Tokyo, Paper No. 15T-03, 2015.
- M. Kohiyama, M. Ohsaki, T. Miyamura and T. Yamashita, Finite element analysis of damping mechanism of autoclaved lightweight aerated concrete panels for exterior walls of steel structures, Proc. 11th World Congress of Computational Mechanics (WCCM11), Barcelona, Spain, Paper No. 1137, 2014.
- M. Ohsaki, J. Y. Zhang and T. Taguchi, Form-finding and stability analysis of tensegrity structures using nonlinear programming and fictitious material properties, Proc. 5th Int. Conf. on Computational Mechanics (ICCM2014), Cambridge, UK, Paper No. 89, 2014.
- M. Yamakawa, M. Tatibana, K. Hukazawa, M. Nihei, M. Ohsaki, T. Nakamura and H. Yamanouchi, Parameter identification and numerical analysis of spring steel damper with a heuristic optimization approach, Proc. 8th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM8), Gyeongju, Korea, Paper No. 0104, 2014.
- Y. Taniguchi, M. Ohsaki and M. Yamakawa, Robust design optimization of building frames using order statistics and local search, Proc. 8th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM8), Gyeongju, Korea, Paper No. 0059, 2014.
- T. Hasegawa, M. Ohsaki and S. Tsuda, Parameter optimization of three-directional tuned mass damper for seismic response control, Proc. 8th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM8), Gyeongju, Korea, Paper No. 0058, 2014.
- M. Ohsaki, J. Nozoe and H. Watanabe, FE-analysis and experiment of optimized and standard link members of K-brace for passive seismic energy dissipation, Proc. Computational Engineering and Science for Safety and Environmental Problems (COMPSAFE2014), Sendai, Japan, pp. 606-609, 2014.
- S. Tsuda, M. Ohsaki and Y. Kanno, Analysis and design of deployable frames with partially rigid connections, Proc. IASS Symposium 2013, Wroclaw, Poland, Int. Assoc. Shell and Spatial Struct., Paper No. 1206, 2013.
- J. Y. Zhang and M. Ohsaki, Free-form design of tensegrity structures by non-rigid-body motion analysis, Proc. IASS Symposium 2013, Wroclaw, Poland, Int. Assoc. Shell and Spatial Struct., Paper No. 1306, 2013.
- M. Ohsaki, S. Tsuda and N. Sugiyama, Parameter optimization of geometrically nonlinear tuned mass damper for multi-directional seismic vibration control, Proc. 13th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC13), Sapporo, Japan, Paper No. A-1-1, 2013.
- T. Miyamura, M. Ohsaki, T. Yamashita, D. Isobe and M. Kohiyama, Dynamic collapse analysis of four-story steel frame using E-Simulator, Proc. 4th Int. Conf. on Computational Methods in Structural Dynamics and Earthquake Engineering (CompDyn2013), Kos, Greece, Paper No. 1494, 2013.
- M. Ohsaki, T. Miyamura, M. Kohiyama, T. Yamashita, M. Yamamoto and N. Nakamura, High-precision finite-element analysis of rubber bearing for base-isolation of building structures, Proc. 4th Int. Conf. on Computational Methods in Structural Dynamics and Earthquake Engineering (CompDyn2013), Kos, Greece, Paper No. 1205, 2013.
- M. Ohsaki, Y. Kanno and S. Tsuda, linear programming approach to design of link mechanisms of partially rigid frames, Proc. 10th World Congress of Structural and Multidisciplinary Optimization (WCSMO10), Orlando, Paper No. 5137, 2013.
- R. Kohta, M. Yamakawa, N. Katoh, Y. Araki and M. Ohsaki, A Design method for optimal truss structures with certain redundancy based on combinatorial rigidity theory, Proc. 10th World Congress of Structural and Multidisciplinary Optimization (WCSMO10), Orlando, Paper No. 5163, 2013.
- M. Yamakawa and M. Ohsaki, Worst-case design of structures using stopping rules in k-adaptive random sampling approach, Proc. 10th World Congress of Structural and Multidisciplinary Optimization (WCSMO10), Orlando, Paper No. 5314, 2013.
- H. Watanabe, M. Ohsaki and J. Nozoe, Shape optimization of energy dissipation devices for passive seismic control of building frames, Structures Congress 2013, ASCE, Pittsburg, Paper No. 2487, 2013.
- M. Katsura, M. Ohsaki and H. Watanabe, Optimization of an arch-type truss under seismic excitations considering uncertainties of geometrical and material parameters, Proc. Int. Symp. Reliability Eng. Risk Management (ISRERM'2012), Yokohama, Paper No. P092, 2012.
- M. Ohsaki, M. Kohiyama, T. Miyamura, T. Yamashita and H. Akiba, High-precision FE-analysis for global and local elastoplastic responses of building frames, Proc. Int. Symp. Reliability Eng. Risk Management (ISRERM'2012), Yokohama, Paper No. P093, 2012.
- H. Watanabe, M. Ohsaki, J. Nozoe and S. Yasuda, Shape optimization of shear-type hysteretic steel damper for building frames using FEM-analysis and heuristic approach, Proc. 7th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM7), Huangshan, China, Paper No. J061, 2012.
- M. Ohsaki, J. Y. Zhang, T. Miyamura, A heuristic algorithm for parameter identification of steel materials under asymmetric cyclic elastoplastic deformation, Proc. 7th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM7), Huangshan, China, Paper No. J045, 2012.
- J. Y. Zhang and M. Ohsaki, Analytical conditions for self-equilibrium and super-stability of tensegrity structures with tetrahedral symmetry, Proc. IASS-APCS 2012, Seoul, Paper No. 007, 2012.
- S. Tsuda and M. Ohsaki, Bi-directional seismic vibration control of spatial structures using passive mass damper consisting of compliant mechanism, Proc. IASS-APCS 2012, Seoul, Paper No. 109, 2012.
- J. Y. Zhang and M. Ohsaki, Free-form design of tensegrity structures by dynamic relaxation method, Proc. IACM-IASS2012, pp. 406-409, 2012.
- M. Ohsaki, N. Ashiya, S. Matsumoto and S. Fujita, Stability of latticed shell with uniform-length hexagonal grid, paper No. P-0221, Proc. IABSE-IASS Symposium, London, 2011.
- J. Y. Zhang, S. D. Guest, M. Ohsaki and R. Connelly, Multi-stable star-shaped tensegrity structures, paper No. P-0614, Proc. IABSE-IASS Symposium, London, 2011.
- J. Y. Zhang and M. Ohsaki, Form-finding methods for tensegrity structures: Our challenges, Structural Morphology Group International Seminar, London, 2011.
- T. Yamashita, M. Ohsaki, T. Miyamura, M. Kohiyama and J. Y. Zhang, Finite element model of steel-concrete composite beam for high-precision seismic response analysis of four-story steel frame, Proc. Int. Symp. on Disaster Simulation & Structural Safety in the Next Generation (DS11), Kobe, Japan, 2011.
- M. Ohsaki, T. Miyamura, M. Kohiyama, J. Y. Zhang, D. Isobe, K. Onda, T. Yamashita, M. Hori, H. Akiba and K. Kajiwara, High-precision FE-analysis of steel frames: Collapse simulation considering composite beam effect, Proc. 6th European Conference on Steel and Composite Structures (EuroSteel 2011), Budapest, pp. 921-926, 2011.
- J. Y. Zhang and M. Ohsaki, Probability-based optimal design of moment-resisting frames using kriging approximation model, Proc. 9th World Congress of Structural and Multidisciplinary Optimization (WCSMO9), Shizuoka, Paper No. 167_1, 2011.
- M. Katsura and M. Ohsaki, Optimum design of steel frames considering uncertainty of parameters, Proc. 9th World Congress of Structural and Multidisciplinary Optimization (WCSMO9), Shizuoka, Paper No. 081_2, 2011.
- M. Ohsaki and T. Nakajima, Optimization of energy dissipation property of eccentrically braced steel frames, Proc. 9th World Congress of Structural and Multidisciplinary Optimization (WCSMO9), Shizuoka, Paper No. 081_1, 2011.
- T. Yamashita, T. Miyamura, M. Ohsaki, M. Kohiyama, D. Isobe, K. Onda, M. Hori, J.Y. Zhang, H. Akiba and K. Kajiwara, High-precision FE-analysis for seismic collapse simulation of steel building frames, Proc. 3rd Int. Conf. on Computational Methods in Structural Dynamics and Earthquake Engineering (CompDyn2011), Corfu, Greece, Paper No. 098, 2011.
- M. Ohsaki and S. Fujita, Multiobjective shape optimization of latticed shells for elastic stiffness and uniform member lengths, Proc. Int. Symposium on Algorithmic Design for Architecture and Urban Design (ALGODE TOKYO 2011), 2011.
- T. Nakajima, M. Ohsaki, J. Fujiwara and F. Takeda, Configuration optimization of clamping members of frame-supported membrane structures, Proc. IASS Symposium 2010, Shanghai, China, Int. Assoc. Shell and Spatial Struct., pp. 661-672, 2010.
- J. Fujiwara, T. Nakajima, M. Ohsaki and F. Takeda, Continuum shape optimization of clamping members of membrane structures under stress constraints, Proc. IASS Symposium 2010, Shanghai, China, Int. Assoc. Shell and Spatial Struct., pp. 673-683, 2010.
- F. Tsuura, J. Y. Zhang and M. Ohsaki, Self-equilibrium and stability of tensegrity structures with polyhedral symmetries, Proc. IASS Symposium 2010, Shanghai, China, Int. Assoc. Shell and Spatial Struct., pp. 2416-2424, 2010.
- J. Y. Zhang and M. Ohsaki, Reliability-based design of single-layer lattice shells using Kriging approximation, Proc. IASS Symposium 2010, Shanghai, China, Int. Assoc. Shell and Spatial Struct., pp. 1605-1613, 2010.
- M. Kohiyama, M. Ohsaki, T. Miyamura, K. Onda, D. Isobe, H. Akiba, M. Hori, K. Kajiwara and T. Ine, Dynamic property evaluations of full-scale 4-story steel frame using parallel FE-analysis, Proc. 9th US National and 10th Canadian Conf. on Earthquake Engineering, Toronto, Canada, Paper No. 1740, 2010.
- R. Watada, M. Ohsaki and Y. Kanno, Uniqueness and symmetry of optimal thickness distribution of axisymmetric shells, Proc. 6th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM6), Kyoto, Japan; Paper No. J28, 2010.
- T. Nakajima, M. Ohsaki, J. Fujiwara and F. Takeda, Configuration optimization of anchoring devices of frame-supported membrane structures for maximum clamping force, Proc. 6th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM6), Kyoto, Japan, Paper No. J02, 2010.
- J. Y. Zhang, M. Ohsaki and I. Elishakoff, Multiobjective hybrid optimization-antioptimization for force design of tensegrity structures, Proc. 6th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM6), Kyoto, Japan; Paper No. J09, 2010.
- S. Fujita and M. Ohsaki, Shape optimization of shells considering quantity of local geometric characteristics, Proc. 6th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM6), Kyoto, Japan; Paper No. J29, 2010.
- T. Yamashita, T. Kumagai, T. Ogawa, T. Miyamura and M. Ohsaki, Shape optimization of long-span translational free-form shell roofs in strong wind using multigrid method and variable complexity model, Proc. 6th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM6), Kyoto, Japan; Paper No. J07, 2010.
- J. Fujiwara, T. Nakajima, M. Ohsaki and F. Takeda, Shape optimization of clamping members of frame-supported membrane structures under stress constraints, Proc. 6th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM6), Kyoto, Japan; Paper No. J20, 2010.
- T. Kinoshita and M. Ohsaki, Topology optimization of compliant mechanisms with sequentially connected units, Proc. Int. Conf. Computational Design in Eng. (CODE2009), Seoul, pp. 13-16, 2009.
- R. Watada and M. Ohsaki, Continuation approach for investigation of non-uniqueness and symmetry of optimal topology for minimum compliance, Proc. Int. Conf. Computational Design in Eng. (CODE2009), Seoul, pp. 17-20, 2009.
- J. Y. Zhang and M. Ohsaki, Reliability-based optimization of spatial structures using approximation model, in: Proc. IASS Symposium 2009, Int. Assoc. for Shell and Spatial Struct., Valencia, Spain, pp. 378-3872009, 2009.
- S. Fujita and M. Ohsaki, Shape optimization of free-form shells considering algebraic invariants of parametric surface, in: Proc. IASS Symposium 2009, Int. Assoc. for Shell and Spatial Struct., Valencia, Spain, pp. 525-535, 2009.
- T. Hikino, M. Ohsaki, K. Kasai and M. Nakashima, Simulation of E-Defense full-scale shake-table test results of moment-resisting steel frame, Proc. Behavior of Steel Structures in Seismic Areas, STESSA 2009, Philadelphia, Taylor \& Francis, pp. 137-143, 2009.
- Y. Kanno and M. Ohsaki, A sequential second-order cone programming for stability analysis of nonsmooth mechanical systems, Proc. 8th World Congress of Structural and Multidiaciplinary Optimization (WCSMO8), lisbon, Paper No. 1066, 2009.
- R. Watada and M. Ohsaki, Continuation approach for investigation of non-uniqueness of optimal topology for minimum compliance, Proc. 8th World Congress of Structural and Multidiaciplinary Optimization (WCSMO8), lisbon, Paper No. 1073, 2009.
- M. ohsaki, A. Uchida and J. Y. Zhang, Multi-modal multi-pattern pushover analysis for seismic design of spatial frames, in: Proc. 9th Asian Pacific Conf. on Shell and Spatial Struct (APCS 2009), Paper No. P0036, 2009.
- J. Y. Zhang, M. Ohsaki, S. D. Guest and R Connell, Stability of tensegrity structures with dihedral symmetry, Proc. 9th Asian Pacific Conf. on Shell and Spatial Struct (APCS 2009), Paper No. P0023, 2009.
- R. Watada and M. Ohsaki, Topology optimization of trusses consisting of traditional layouts, Proc. 9th Asian Pacific Conf. on Shell and Spatial Struct (APCS 2009), Paper No. P0026, 2009.
- S. Fujita and M. Ohsaki, Shape optimization of shells considering strain energy and algebraic invariants of parametric surface, Proc. 9th Asian Pacific Conf. on Shell and Spatial Struct (APCS 2009), Paper No. P0012, 2009.
- T. Kinoshita, M. Ohsaki and T. Nakajima, Topology optimization of compliant mechanisms for seismic isolation of spatial structures, Proc. 9th Asian Pacific Conf. on Shell and Spatial Struct (APCS 2009), Paper No. 30, 2009.
- M. Ohsaki, J. Y. Zhang and I. Elishakoff, Optimization and anti-optimization of forces in tensegrity structures, Proc. IASS Symposium 2008, Int. Assoc. for Shell and Spatial Struct., Acapulco, Mexico, 2008.
- J. Y. Zhang and M. Ohsaki, Numerical form-finding method for tensegrity tower, Proc. IASS Symposium 2008, Int. Assoc. for Shell and Spatial Struct., Acapulco, Mexico, 2008.
- M. Ohsaki, K. Kasai, T. Hikino and Y. Matsuoka, Overview of 2007 E-Defense blind analysis contest results, Proc. 14th World Conf. on Earthquake Eng., Beijing, S17-03-004, 2008.
- P. Pan, M. Ohsaki and J. Y. Zhang, Collapse analysis of 4-story steel moment resisting frames, Proc. 14th World Conf. on Earthquake Eng., Beijing, Paper No. 05-01-003, 2008.
- M. Ohsaki, K. Kasai, M. Yamamoto and S. Kiriyama, 2-D analysis methods for 2007 blind analysis contest, Proc. 14th World Conf. on Earthquake Eng., Beijing, Beijing, S17-03-005, 2008.
- M. Ohsaki, K. Kasai, G. Thiagarajan, Y.-S. Yang and Y. Komiya, 3-D analysis methods for 2007 blind analysis contest, Proc. 14th World Conf. on Earthquake Eng., Beijing, Beijing, S17-03-007, 2008.
- J. Y. Zhang, M. Ohsaki and A. Uchida, Equivalent static loads for nonlinear seismic design of spatial structures, Proc. 14th World Conf. on Earthquake Eng., Beijing, Paper No. 05-01-0110, 2008.
- T. Ine, M. Hori, H. Noguchi, M. Ohsaki, T. Miyamura, K. Oguni, M. Kohiyama, K. Kajiwara and H. Akiba, Development of extremely large-scale analysis software (E-Simulator: virtual shaking table) for earthquake dynamic collapse analysis of structures, Proc. 14th World Conf. on Earthquake Eng., Beijing, Paper No. 05-01-0169, 2008.
- K. Ikeda, M. Ohsaki, K. Sudo and T. Kitada, Probabilistic analysis of buckling loads of structures via extended Koiter law, Proc. 4th Int. Conf. on Advances in Struct. Eng. and Mech. (ASEM08), 2008.
- M. Ohsaki, Local search for multiobjective optimization of steel frames, Proc. 5th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM5), Jeju, Korea, 2008.
- T. Kinoshita and M. Ohsaki, Topology synthesis of bistable compliant mechanisms using truss elements, Proc. 5th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM5), Jeju, Korea, 2008.
- T. Hagishita and M. Ohsaki, Integrated approach of heuristics and non-linear programming for topology optimization under stress constraints, Proc. 5th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM5), Jeju, Korea, 2008.
- J. Y. Zhang and M. Ohsaki, Topology and shape of tensegrity structures, 6th Int. Conf. on Computation of Shell and Spatial Structures, Ithaca, IASS-IACM, 2008.
- M. Ohsaki and R. Watada, linear mixed integer programming for topology optimization of trusses and plates, 6th Int. Conf. on Computation of Shell and Spatial Structures, Ithaca, IASS-IACM, 2008.
- M. Ohsaki, K. Kasai, Y. Matsuoka and J. Y. Zhang, Results of recent E-Defence tests on full-scale steel building: Part 2 -- Collapse simulation and blind analysis contest, Structures Congress 2008, ASCE, Vancouver, 2008.
- T. Miyamura, Y. Kanno and M. Ohsaki, Combination of interior-point method and semismooth Newton method for solving frictionless contact problems, Proc. APCOM'07 -- EPMESC XI, Kyoto, Japan, 2007.
- P. Pan, H. Tomofuji, T. Wang, M. Nakashima, M. Ohsaki and K. M. Mosalam, Design and implementation of peer-to-peer (P2P) internet online hybrid test system, Proc. 2nd Int. Conf. Advances in Experimental Structural Engineering, Shanghai, China, Vol. 1, pp. 255-261.2007.
- J. Y. Zhang and M. Ohsaki, Optimization approach to force identification of prestresses pin-jointed structures, Structural Architecture -- Towards the Future Looking to the Past, Proc. IASS 2007, Venice, Italy, Int. Assoc. Shell and Spatial Struct., Paper No. 182, pp. 393-394, 2007.
- J. Y. Zhang and M. Ohsaki, Optimization methods for force and shape design of tensegrity structures, Proc. 7th World Congress of Structural and Multidisciplinary Optimization (WCSMO7), Seoul, pp. 40-49, 2007.
- T. Hagishita and M. Ohsaki, Optimization of placement of braces for a frame with semi-rigid joints by scatter dearch, Proc. 7th World Congress of Structural and Multidisciplinary Optimization (WCSMO7), Seoul, pp. 692-701, 2007.
- N. Katoh, M. Ohsaki, T. Kinoshita, S. Tanigawa, D. Avis and I. Steinu, Enumeration of optimal pin-jointed bistable compliant mechanism, Proc. 7th World Congress of Structural and Multidisciplinary Optimization (WCSMO7), Seoul, pp. 1041-1050, 2007.
- Y. Kanno and M. Ohsaki, Maximization of minimal eigenvalue of structures by using sequential semidefinite programming, Proc. 7th World Congress of Structural and Multidisciplinary Optimization (WCSMO7), Seoul, pp. 1121-1130, 2007.
- M. Ohsaki and S. Nishiwaki, Generation of link mechanism by shape-topology optimization of trusses considering geometrical nonlinearity, Proc. 7th World Congress of Structural and Multidisciplinary Optimization (WCSMO7), Seoul, pp. 1834-1842, 2007.
- M. Tada, M. Ohsaki, S. Yamada, S. Motoyui and K. Kasai, E-Defence tests on full-scale steel buildings: Part 3 -- Analytical simulation of collapse, Structures Congress 2007, ASCE, Long Beach, 2007.
- N. Katoh, M. Ohsaki, T. Kinoshita, S. Tanigawa, D. Avis and I. Streinu, Enumeration of optimal pin-jointed bistable compliant mechanisms, Proc. Fourth China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM4), Kunming, China, pp. 65-70, 2006.
- M. Ohsaki and P. Pan, Shape optimization of H-beam flange for maximum plastic energy dissipation, Proc. Fourth China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM4), Kunming, China, pp. 443-448, 2006.
- J. Y. Zhang and M. Ohsaki, Multiobjective optimization for force design of tensegrity structures, Proc. Fourth China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM4), Kunming, China, pp. 485-490, 2006.
- P. Pan, H. Tomofuji, T. Wang, M. Nakashima, M. Ohsaki and K. M. Mosalam, Development of peer-to-peer (P2P) internet online hybrid test system, Proc. 10th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC10), 2006.
- S. Furusaka, M. Ohsaki, K. Harada, S. Arai, M. Yokose, T. Kaneta, H. Kashii, K. Nakazono and N. Katoh, Development of a risk management system for the project life cycle of super-highrise residence, Proc. 23rd Int. Symposium on Robotics and Automation on Construction (ISARC2006), 2006.
- P. Pan and M. Ohsaki, Nonlinear multimodal pushover analysis method for spatial structures, IASS-APCS 2006, Beijing, China, Int. Assoc. Shell and Spatial Struct., 2006.
- J. Fujiwara, S. Segawa, K. Oda, F. Fujii, M. Ohsaki and H. Noguchi, Static loading tests and a computational mode of a flexible net, IASS-APCS 2006, Beijing, China, Int. Assoc. Shell and Spatial Struct., 2006.
- M. Ohsaki and K. Ikeda, Imperfection sensitivity of arch-type trusses with simultaneous snapthrough and member buckling, IASS-APCS 2006, Beijing, China, Int. Assoc. Shell and Spatial Struct., 2006.
- J. Y. Zhang, S. Guest and M. Ohsaki, Symmetric prismatic tensegrity structures, IASS-APCS 2006, Beijing, China, Int. Assoc. Shell and Spatial Struct., 2006.
- D. Avis, N. Katoh, M. Ohsaki, I. Streinu and S. Tanigawa, Enumerating non-crossing minimally rigid frameworks, Proc. 9th Japan-Korea Joint Workshop on Algorithms and Computation, pages 73-78, 2006.
- D. Avis, N. Katoh, M. Ohsaki, I. Streinu and S. Tanigawa, Enumerating non-crossing minimally rigid frameworks, Proc. 12th Annual Int. Computing and Combinatorics Conf. (COCOON 2006), Lecture Notes in Computer Science, 4112, pages 205-215, Springer, 2006
- D. Avis, 加藤直樹, 大崎 純, I. Streinu, 谷川眞一, 制約付き静定グラフ 列挙アルゴリズム, 情報処理学会研究報告, AL-108-5, pp33-40, 2006
- M. Ohsaki, T. Kinoshita and P. Pan, Heuristic approaches to performance-based design of steel frames with standard sections, Proc. Behavior of Steel Structures in Seismic Areas, STESSA 2006, Yokohama, Taylor \& Francis, pp. 67-72, 2006.
- P. Pan, M. Ohsaki and T. Kinoshita, Constraint approach to performance-based design of steel moment-resisting frames, Proc. Behavior of Steel Structures in Seismic Areas, STESSA 2006, Yokohama, Taylor \& Francis, pp. 73-78, 2006.
- M. Ohsaki, Local and global searches of approximate optimal designs of regular frames, III European Conference on Computational Mechanics (ECCM 2006), lisbon, Paper No. 1174, 2006.
- S. Furusaka, T. Kaneta, M. Ohsaki, K. Harada, Y. Orita, S. Arai and N. Katoh, Quantitative analysis for the risk management of a super-highrise residence, Proc. 1st Int. Conf. on Construct. Eng. and Management, ICCM 2005, Seoul, Korea, Paper S3-B1, 2005.
- J-Y. Zhang and M. Ohsaki, Form-finding of self-stressed structures by an extended force density method, Proc. IASS Symposium 2005, Bucharest, Romania, Int. Assoc. Shell and Spatial Struct., pp. 93--100, 2005.
- M. Ohsaki, J-Y. Zhang and S. Kimura, An optimization approach to design of geometry and forces of tensegrities, Proc. IASS Symposium 2005, Bucharest, Romania, Int. Assoc. Shell and Spatial Struct., pp. 603--610, 2005.
- Y-F. Xu, W-Q. Dai, N. Katoh and M. Ohsaki, Triangulating a convex polygon with small number of non-standard bars, Proc. 11th Annual Int. Conf, COCOON 2005, Lecture Notes in Computer Science, 3595, Springer, 2005.
- T. Wang, P. Pan, H. Tomofuji, M. Ohsaki and M. Nakashima, Substructure online test combined with general-purpose finite element program, Proc. 1st Int. Conf. on Advances in Experimental Struct. Eng., AESE 2005, Nagoya, pp. 243-250, 2005.
- M. Ohsaki and N. Katoh, Topology optimization of trusses with stress and local constraints, Proc. 5th Int. Conf. on Computation of Shell and Spatial Structures, Salzburg, IASS-IACM, 2005.
- N. Katoh, M. Ohsaki and Y. Xu, A uniform triangle mesh generation of curved surfaces, Proc. Third China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM3), Kanazawa, Japan, pp. 759-764, 2004.
- J. Zhang, M. Ohsaki and Y. Araki, Optimal measurement positions for identifying stress distribution of membrane structures using cable net approximation, Proc. Third China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM3), Kanazawa, Japan, pp. 547-552, 2004.
- M. Ohsaki and S. Nishiwaki, Shape design of bistable compliant mechanisms by utilizong snapthrough behavior, Proc. Third China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM3), Kanazawa, Japan, pp. 359-364, 2004.
- T. Ogawa, M. Ohsaki, T. Miyamura, M. Nakayama and Y. Sasaki, Shape optimization of shell roofs subjected to strong wind by using a variable complexity model, Proc. Third China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM3), Kanazawa, Japan, pp. 185-190, 2004.
- M. Ohsaki, Optimum design of trusses for specified seismic responses considering stiffness of supporting structure, Proc. Int. Symp. on Network and Center-Based Research for Smart Structures Technologies and Earthquake Engineering (SE'04), pp. 513-518, 2004.
- H. Tagawa, T. Kondo and M. Ohsaki, Optimization of space trusses considering spatial variation of input ground motions, Proc. Int. Symp. on Network and Center-Based Research for Smart Structures Technologies and Earthquake Engineering (SE'04), pp. 507-512, 2004.
- M. Ohsaki and Y. Kanno, Form-finding of cable domes with specified stresses by using nonlinear programming, Proc. IASS-APCS 2003, Taipei, Taiwan, Int. Assoc. Shell and Spatial Struct., 2003.
- K. Uetani, M. Ohsaki and J. Fujiwara, A simple viscoelastic material model and cutting pattern optimization for membrane structures, E. Onate and Bo. Kr"oplin (Eds.), Textile Composites and Inflatable Structures, Int. Center for Num. Meth. Engng. (CIMNE), Barcelona, pp. 113-118, 2003.
- Y. Kanno and M. Ohsaki, Second-order cone programming for contact analysis of cable networks, Proc. 5th World Congress of Structural and Multidisciplinary Optimization (WCSMO5), Paper No. 116, 2003.
- M. Ohsaki, Sensitivity analysis of optimized structures with hill-top branching, Proc. 5th World Congress of Structural and Multidisciplinary Optimization (WCSMO5), Paper No. 128, 2003.
- J. Takagi and M. Ohsaki, Optimum design of lateral braces of columns under buckling constraints considering critical imperfection, Proc. 5th World Congress of Structural and Multidisciplinary Optimization (WCSMO5), Paper No. 120, 2003.
- M. Ohsaki, Critical minor imperfection corresponding to stable bifurcation, Proc. 2nd International Conference on Structural Stability and Dynamics (ICSSD2), pp. 496-501, 2002.
- T. Ogawa, M. Ohsaki, Y. Nishikawa and R. Tateishi, Mechanical properties of two-way grid shells optimized considering roundness and elastic stiffness, Proc. Second China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM2), Busan, Korea, pp. 201-206, 2002.
- N. Katoh and M. Ohsaki, A relaxation method for topology optimization of trusses under stress and local constraints, Proc. Second China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM2), Busan, Korea, pp. 165-170, 2002.
- Y. Kanno and M. Ohsaki, Second-order cone programming for complementary energy principle of cable networks, Proc. Second China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM2), Busan, Korea, pp. 695-700, 2002.
- J. Fujiwara and M. Ohsaki, Developability conditions and prestress optimization for prestress optimization for prestressed curved surfaces, Proc. Second China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM2), Busan, Korea, pp. 195-200, 2002.
- M. Ohsaki, Optimum design of geometrically nonlinear structures with degenerate critical points, Proc. Second China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM2), Busan, Korea, pp. 99-104, 2002.
- J. Fujiwara and M. Ohsaki, Retensioning optimization of membrane structures considering static and dynamic stiffness properties, Proc. Fifth International Conference on Space Structures, Surrey, UK, G. Parke and P. Disney (eds.), Thomas Telford, London, pp. 1089-1098, 2002.
- T. Ogawa, M. Ohsaki, R. Tateishi and T. Kumagai, Shape optimization of single-layer latticed shells for maximum linear buckling loads, Proc. Fifth International Conference on Space Structures, Surrey, UK, G. Parke and P. Disney (eds.), Thomas Telford, London, pp. 1345-1354, 2002.
- Y. Kanno and M. Ohsaki, Second-order cone programming for shape analysis and form finding of cable networks, Proc. Fifth International Conference on Space Structures, Surrey, UK, G. Parke and P. Disney (eds.), Thomas Telford, London, pp. 567-576, 2002.
- M. Ohsaki, T. Ogawa and R. Tateishi, Multiobjective shape optimization of shells considering roundness and elastic stiffness, Proc. Fifth International Conference on Space Structures, Surrey, UK, G. Parke and P. Disney (eds.), Thomas Telford, London, pp. 377-385, 2002.
- Y. Kanno, M. Ohsaki and N. Katoh, Symmetry of the solution of semidefinite program by using primal-dual interior-point method, Proc. Fourth World Congress of Structural and Multidiaciplinary Optimization (WCSMO4), Dalian, China, Paper No. 20, 2001.
- M. Ohsaki and Y. Kanno, Optimum design of finite dimensional systems with coincident critical points, Proc. Fourth World Congress of Structural and Multidiaciplinary Optimization (WCSMO4), Dalian, China, Paper No. 21, 2001.
- M. Ohsaki, Parametric sensitivity of optimal arch-type frames subjected to spatially varying seismic motions, Theory, Design and Realization of Shell and Spatial Structures, Proc. IASS Symposium 2001, Nagoya, Japan, Int. Assoc. Shell and Spatial Struct., Paper No. TP124, 2001.
- T. Mizutani, J. Fujiwara, M. Ohsaki, T. Kitaori and O. Hosozawa, Pretension optimization of cable-supported spatial frames, Theory, Design and Realization of Shell and Spatial Structures, Proc. IASS Symposium 2001, Nagoya, Japan, Int. Assoc. Shell and Spatial Struct., Paper No. TP053, 2001.
- Y. Kanno and M. Ohsaki, Large deflection analysis of cable networks by second-order cone program, Theory, Design and Realization of Shell and Spatial Structures, Proc. IASS Symposium 2001, Nagoya, Japan, Int. Assoc. Shell and Spatial Struct., Paper No. TP052, 2001.
- J. Fujiwara, M. Ohsaki and K. Uetani, Cutting pattern design of membrane structures considering viscoelasticity of material, Theory, Design and Realization of Shell and Spatial Structures, Proc. IASS Symposium 2001, Nagoya, Japan, Int. Assoc. Shell and Spatial Struct., Paper No. TP047, 2001.
- Y. Kanno, M. Ohsaki, K. Fujisawa and N. Katoh, Topology optimization for specified multiple linear buckling load factors by using semidefinite programming, Proc. 1st Int. Conf. on Struct. Stability and Dynamics (ICSSD 2000), pp. 267-272, 2000.
- M. Ohsaki, J. Fujiwara, T. Kitaori, T. Mizutani and O. Hosozawa, Optimization of pretensioning process of a cable-stayed frame by inverse construction analysis, Proc. 6th Asian Pacific Conf. on Shell and Spatial Struct (APCS 2000), Vol. 2, pp. 711-718, 2000.
- F. Aurenhammer, N. Katoh, H. Kojima, M. Ohsaki and Y-F. Xu, Approximating uniform triangular meshes in polygons, Proc. 6th Annual Int. Conf, COCOON 2000, Lecture Notes in Computer Science, 1858, Springer, 2000.
- K. Uetani, E. Mitsuda and M. Ohsaki, Cutting-pattern optimization of membrane structures by parametric approach with respect to boundary shapes, Proc. 4th Int. Colloquim on Computation on Shell & Spatial Struct. (IASS-IACM 2000), 2000.
- M. Ohsaki, Y. Nagano and K. Wakamatsu, A two-level optimization method for seismic design of elastic three-dimensional frames, Proc. 12th World Confefence on Earthquake Engineering, Auckland, New Zealand, Paper \#0686, 2000.
- M. Tsuji, Y. Nagano, M. Ohsaki and K. Uetani, Optimum design method for high-rise building frame with viscous dampers, Proc. 12th World Confefence on Earthquake Engineering, Auckland, New Zealand, Paper \#0754, 2000.
- H. Tagawa and M. Ohsaki, A continuous topology transition model for shape optimization of plane trusses with uniform cross-sectional area, Proc. 3rd World Congress of Structural and Multidisciplinary Optimization (WCSMO3), 1999.
- K. Fujisawa, Y. Kanno, M. Ohsaki and N. Katoh, Semi-definite programming for topology optimization of trusses under multiple eigenvalue constraints, Proc. 3rd World Congress of Structural and Multidisciplinary Optimization (WCSMO3), 1999.
- M. Ohsaki and J. Fujiwara, An inverse method for cutting pattern optimization of membrane structures considering material nonlinearity, Proc. 40th Anniversary Congress of the Int. Assoc. for Shells and Spatial Struct., Madrid, B3.23-30, 1999.
- N. Katoh, M. Ohsaki and Y-F. Xu, An approximation algorithm for finding a uniform triangular mesh, Proc. Korea-Japan Joint Workshop on Algorithms and Computation, pp. 139-146, 1999.
- M. Ohsaki and Y. Kato, Simultaneous optimization of topology and nodal locations of a plane truss associated with a B'ezier curve, Structural Engineering in the 21st Century, Proc. Structures Congress, ASCE, pp. 582-585, 1999.
- M. Ohsaki, N. Katoh and Y. Isshiki, Interactive multiobjective two-level optimization of dissatisfaction level of structures, Proc. Seventh AIAA/USAF/NASA/ISSMO Symposium on Multidisciplinary Analysis and Optimization, AIAA, pp. 97-106, 1998.
- 大崎 純, 遺伝的アルゴリズムと確率モデルによる施設配置最適化，第20回 情報システム利用技術シンポジウム, pp. 409-414, 1997.
- K. Uetani, E. Fujii and M. Ohsaki, Initial stress field determination of membranes using optimization technique, Y-B. Yang (Ed.), Proc. Int. Colloquim on Computation of Shell & Spatial Struct., Taipei, pp. 301-306, 1997.
- M. Ohsaki, K. Uetani and M. Takeuchi, Optimum design of symmetric trusses for specified maximum load factor, Y-B. Yang (Ed.), Proc. Int. Colloquim on Computation of Shell & Spatial Struct., Taipei, pp. 295-300, 1997.
- M. Ohsaki and H. Tagawa, Genetic algorithm for simultaneous optimization of topology and geometry of a regular plane truss, Proc. Int. Symposium on Optimization and Innovative Design (OPID97), Japan Soc. of Mech. Engineers, Paper #121, 1997.
- M. Ohsaki, Sensitivity analysis of elastoplastic structures by using explicit integration method, Applied Mechanics in the Americas, Proc. 5th Pan American Congress of Applied Mechanics, Vol. 5, The University of Iowa, Iowa City, IA, pp. 304-306, 1997.
- 大崎 純, 田川 浩, 遺伝的アルゴリズムを用いた規則的平面トラスのトポロ ジー・節点位置同時最適化法, 第19回情報システム利用技術シンポジウム, pp. 295-300, 1996.
- M. Ohsaki and T. Nakamura, Optimum design of geometrically nonlinear trusses via stress constrained design, WCSMO-1, Proc. First World Congress of Structural and Multidisciplinary Optimization, pp. 459-464, 1995.
- T. Nakamura and M. Ohsaki, Earthquake-strain constrained design for large space frames, Space Structures 4, Proc. 4th Int. Conf. on Space Structures, Surrey, UK, G. Parke and C. Howard (eds.), Thomas Telford, London, pp. 479-506, 1993.
- M. Ohsaki and T. Nakamura, A natural generator of optimum topology of a space frame for specified fundamental frequency, in: Space Structures 4, Proc. 4th Int. Conf. on Space Structures, Surrey, UK, G. Parke and C. Howard (eds.), Thomas Telford, London, pp. 1221-1229, 1993.
- M. Ohsaki and J.S. Arora, A direct application of parametric programming techniques to constrained optimization problems, in: Proc. Fourth AIAA/USAF/NASA/OAI Symposium on Multidisciplinary Analysis and Optimization, AIAA, pp. 1058-1068, 1992.
- T. Nakamura and M. Ohsaki, Geometrical optimization of elastically supported doubly curved space trusses designed for specified earthquake-strains, Proc. IV-ICCCBE, JSCE and AIJ, Tokyo, pp. 337, 1991.
- T. Nakamura and M. Ohsaki, Sequential generator of earthquake-strain constrained curved space trusses for design strain ranges, Optimization of Structural Systems and Industrial Applications, Proc. OPTI91, Cambridge, MA, C. A. Brebbia and S. Hernandez (eds.), Elsevier, London, pp. 233-244, 1991.
- M. Ohsaki and T. Nakamura, Sequential generator of optimal structures for candidate frequency ranges, Optimization of Structural Systems and Industrial Applications, Proc. OPTI91, Cambridge, MA, C. A. Brebbia and S. Hernandez (eds.), Elsevier, London, pp. 221-232, 1991.
- T. Nakamura and M. Ohsaki, Optimum plastic design of large regular trusses and control of member force distributions, in: Proc. IASS Symposium, Shells, Membranes and Space Frames, Vol. 3, pp. 199-206, 1986.