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On the best design for undulatory swimming

Christophe Eloy
2013 Journal of Fluid Mechanics  
Here, this question is addressed by seeking the optimal design for undulatory swimmers with an evolutionary algorithm.  ...  Except for very elongated swimmers like eels and lampreys, these animals have evolved to a similar shape: an anterior streamlined region of large volume separated from a caudal fin by a caudal peduncle  ...  Now, the characteristics and performances of the optimal swimmers found on this Pareto front are examined.  ... 
doi:10.1017/jfm.2012.561 fatcat:5rjtv3phrngkveitqsoszstahy

Energetics of optimal undulatory swimming organisms

Grgur Tokić, Dick K. P. Yue, Benjamin Risse
2019 PLoS Computational Biology  
or COT-optimal swimmers, respectively.  ...  Our results lead to three main conclusions: (1) in contrast to previous hypotheses, achieving optimal values of U and COT is independent of producing maximal power or efficiency; (2) muscle efficiency  ...  Note that a real organism might be neither U-optimal nor COT-optimal; it might be similar to some other optimal swimmer from the optimal population, i.e. the Pareto front, and its the performance could  ... 
doi:10.1371/journal.pcbi.1007387 pmid:31671088 pmcid:PMC6822725 fatcat:6qehrjraknbn7mhzslfwr23t74

Diving into a simple anguilliform swimmer's sensitivity [article]

Nicholas A. Battista
2020 arXiv   pre-print
Trends in swimming performance were discovered by projecting the performance metrics from the overall 3D parameter space onto particular 2D subspaces and Pareto-like optimal fronts were identified for  ...  Computational models of aquatic locomotion range from individual modest simple swimmers in 2D to sophisticated 3D individual swimmers to complex multi-swimmer models that attempt to parse collective behavioral  ...  This is referred to as Pareto-like simply because minimal COT is desired for maximal 1/St, thus both metrics are not being maximized as is standard in traditional Pareto optimization.  ... 
arXiv:2007.15169v1 fatcat:tmc6ci3g2rbvxbwdlmgijwlsoi

Optimal morphokinematics for undulatory swimmers at intermediate Reynolds numbers

Wim M. van Rees, Mattia Gazzola, Petros Koumoutsakos
2015 Journal of Fluid Mechanics  
It is, however, unknown to what extent natural swimmers are optimized for hydrodynamic performance.  ...  These optimal solutions outperform anguilliform swimming zebrafish in both efficiency and speed.  ...  We note that this approach is not meant to approximate the Pareto front between our two optimization metrics, which would be beyond the near-future capabilities of computing for the 3D direct numerical  ... 
doi:10.1017/jfm.2015.283 fatcat:jftemkf5nrbf7ehtts2vhgfxwm

Swimming through parameter subspaces of a simple anguilliform swimmer

Nicholas A Battista
2020 Integrative and Comparative Biology  
Pareto-like optimal fronts were also identified within the data for the cost of transport and swimming speed.  ...  The 1D swimmer propagates itself forward by dynamically changing its preferred body curvature.  ...  done in Pareto optimization strategies.  ... 
doi:10.1093/icb/icaa130 pmid:32926101 fatcat:cm67see2w5ckdo2ss4i2jzzd4u

Temporal Structures of Justification in the : Legal Philosophy and [chapter]

Kevin Jackson
2020 Virtues and Economics  
For the law and economics movement, such agendas are grounded in a peculiar ideology of rational choice, efficiency, pareto optimality, and wealth maximization.  ...  optimality, wealth maximization).  ... 
doi:10.1007/978-3-030-52673-3_13 fatcat:bzl7zko5zbcllkestzj6yzclpy

Motile curved bacteria are Pareto-optimal [article]

Rudi Schuech, Tatjana Hoehfurtner, David Smith, Stuart Humphries
2018 biorxiv/medrxiv   pre-print
Performance tradeoffs between these tasks lead to a variety of shapes that are Pareto-optimal, including coccoids, all straight rods, and a range of curvatures.  ...  Comparison with an extensive morphological survey of motile curved-rod bacteria indicates that the vast majority of species fall within the Pareto-optimal region of morphospace.  ...  Pareto Optimality and GoF.  ... 
doi:10.1101/441139 fatcat:wloqqkdlnrgmbk3xqv2adwgtpq

Motile curved bacteria are Pareto-optimal

Rudi Schuech, Tatjana Hoehfurtner, David J. Smith, Stuart Humphries
2019 Proceedings of the National Academy of Sciences of the United States of America  
Performance trade-offs between these tasks lead to a variety of shapes that are Pareto-optimal, including coccoids, all straight rods, and a range of curvatures.  ...  Comparison with an extensive morphological survey of motile curved-rod bacteria indicates that the vast majority of species fall within the Pareto-optimal region of morphospace.  ...  Pareto Optimality and GoF.  ... 
doi:10.1073/pnas.1818997116 pmid:31266896 pmcid:PMC6642390 fatcat:atzeq4mkyzg25bbeasxkufhbie

THE THEORY OF LOCAL PUBLIC GOODS TWENTY–FIVE YEARS AFTER TIEBOUT: A PERSPECTIVE [chapter]

Joseph E. Stiglitz
1983 Local Provision of Public Services  
There are two types of individuals, skiers and swimmers.  ...  We established earlier that, in the land based model, Pareto optimal allocations (with free migration) will require inter-island transfers, unless Figure 5a the Pareto optimal equal utilities equilibrium  ... 
doi:10.1016/b978-0-12-781820-7.50007-8 fatcat:shwat3qjhzbhhgb7ctvyyu5s5q

Multi-objective optimization for efficient motion of underwater snake robots

E. Kelasidi, M. Jesmani, K. Y. Pettersen, J. T. Gravdahl
2016 Artificial Life and Robotics  
Therefore, decision makers can specify the preferred Pareto optimal point along the trade-off curve.  ...  Trade-off curves or Pareto fronts are illustrated in a power consumption-forward velocity plane for both lateral and eel-like motion pattern.  ...  In [19] , a genetic algorithm (GA) is applied to a three link swimmer in order to optimize the swimming gait.  ... 
doi:10.1007/s10015-016-0332-3 fatcat:f6txlcdlajg3fopnlpznu6k3gq

Automatic Snake Gait Generation Using Model Predictive Control [article]

Emily Hannigan, Bing Song, Gagan Khandate, Maximilian Haas-Heger, Ji Yin, Matei Ciocarlie
2020 arXiv   pre-print
For each of these models, gaits generated without any change in the method or its parameters are as efficient as Pareto-optimal serpenoid gaits tuned individually for each environment.  ...  Instead of starting from a pre-defined movement pattern such as a serpenoid curve, we use a Model Predictive Control approach to automatically generate effective locomotion gaits via trajectory optimization  ...  The resulting gaits are comparable to the baseline of the Pareto-optimal serpenoid gaits.  ... 
arXiv:1909.11204v3 fatcat:3ju7scxgmvdlraox377dzxtl2i

Locomotion Efficiency Optimization of Biologically Inspired Snake Robots

Eleni Kelasidi, Mansoureh Jesmani, Kristin Pettersen, Jan Gravdahl
2018 Applied Sciences  
In particular, the operators or designers of bio-inspired snake robots can choose a Pareto optimal point based on the trade-off curve, given the preferred number of links on the robot.  ...  Pareto fronts or trade-off curves are illustrated for both land-based and swimming snake robots with different numbers of links. Pareto fronts represent trade-offs between the objective functions.  ...  In [24] , a genetic algorithm (GA) is applied to a three-link swimmer to solve the swimming gait optimization problem. Moreover, pattern optimization of anguilliform swimming is studied in [25] .  ... 
doi:10.3390/app8010080 fatcat:pi5j6ynjzbhpbmimlh6vx2t3iu

Dragon-slaying and ballroom dancing: The private supply of a public good

Christopher Bliss, Barry Nalebuff
1984 Journal of Public Economics  
As an application of the optimal auctions literature to the public goods problem, the emphasis is placed on the effect of additional agents on potential supply.  ...  the swimmer from drowning.  ...  The argument above proves that an increase in the number of agents is a Pareto improvement in the sense that each type of agent has a higher welfare.  ... 
doi:10.1016/0047-2727(84)90041-0 fatcat:mcfhwhqrn5eldjpp3tcp6vtfoy

Undulatory and oscillatory swimming

Alexander J. Smits
2019 Journal of Fluid Mechanics  
To understand the swimming of oscillatory swimmers such as tuna and dolphins, models need to consider both added mass forces and circulatory forces.  ...  The Pareto front is broadly defined by α m between 20 • and 30 • . Data obtained by Van Buren et al. (2018a).  ...  The data appear to display a Pareto front, where the maximum instantaneous angle of attack is less than about 30 • .  ... 
doi:10.1017/jfm.2019.284 fatcat:mdpafp2ys5e6dp6tg2vw4h6nyy

Hopscotching Jellyfish: combining different duty cycle kinematics can lead to enhanced swimming performance [article]

Tierney Baldwin, Nicholas A. Battista
2021 arXiv   pre-print
Performance landscapes showed that lower frequency cases could produce Pareto-optimal swimmers (highest speed for lowest COT) or some of the worst swimmers (lowest speed for highest COT), see Figure 16b  ...  However, optimal combinations seem to favor at least one duty cycle with lower p 1 (Figures 17e and f) , as they are closer to the Pareto-optimal curve.  ... 
arXiv:2103.09894v2 fatcat:f3lmjr73ffchhf4masy33sloqu
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