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Energy-optimal strokes for multi-link microswimmers: Purcell's loops and Taylor's waves reconciled [article]

François Alouges, Antonio DeSimone, Laetitia Giraldi, Yizhar Or,, Oren Wiezel
2019 arXiv   pre-print
Micron-scale swimmers move in the realm of negligible inertia, dominated by viscous drag forces.  ...  In this paper, we formulate the leading-order dynamics of a slender multi-link (N-link) microswimmer assuming small-amplitude undulations about its straight configuration.  ...  Figure 4 : 4 Optimal strokes for multi-link swimmers with large N for ∆x = 0.01l, where l is the length of a single link.  ... 
arXiv:1801.04687v3 fatcat:kzludthdojbzzf7ve5o5jbqp4i

Active Cloaking in Stokes Flows via Reinforcement Learning [article]

Mehdi Mirzakhanloo, Soheil Esmaeilzadeh, Mohammad-Reza Alam
2020 arXiv   pre-print
This artificial intelligence enables them to dynamically adjust their swimming actions, so as to optimally form and robustly retain any desired arrangement around the moving object without disturbing it  ...  Here, we devise a systematic methodology to actively cloak swimming objects within any arbitrarily crowded suspension of micro-swimmers.  ...  Declaration of Interests The authors report no conflict of interest.  ... 
arXiv:1911.03529v2 fatcat:dmho5bbfavd5vao3yffo3tgshi

Design and Analysis of Micro Swimmers with Study of Mechanical Investigations Using Helical Spring Models

Ocimum Scientific Publishers Pty Ltd
2020 Journal of Annals of Bioengineering  
helical spring swimmer models and analyzing several parameters of them gives us an optimal design.  ...  By analyzing those results it had been framed out the optimal design of a helical spring micro swimmer.  ...  Future multi component NWs/NRs should be centred in the fabrication of general nanostructures which are able to be do multi-tasking like drug delivery, sensing, water redemption, catalysis etc. and they  ... 
doi:10.33513/bioe/2001-11 fatcat:vsjp5jcpurgqbfgs4q7iwcwtbe

Applications of three-dimensional (3D) printing for microswimmers and bio-hybrid robotics

M. M. Stanton, C. Trichet-Paredes, S. Sánchez
2015 Lab on a Chip  
Other than actuation, contractile cells have also been employed for powering artificial robotic swimmers.  ...  Other than actuation, contractile cells have also been employed for powering artificial robotic swimmers.  ... 
doi:10.1039/c5lc90019k pmid:25632887 fatcat:quzawcmltvgcbegn7m6e2ef4iq

Energy-optimal strokes for multi-link microswimmers: Purcell's loops and Taylor's waves reconciled

François Alouges, Antonio De Simone, Laetitia Giraldi, Yizhar Or, Oren Wiezel
2019 New Journal of Physics  
Micron-scale swimmers move in the realm of negligible inertia, dominated by viscous drag forces.  ...  The fully nonlinear optimal control problem is solved numerically for the cases N =3 (Purcell's three-link swimmer) and N =5 showing that, as the prescribed displacement becomes small, the optimal solutions  ...  Figure 4 : 4 Optimal strokes for multi-link swimmers with large N for ∆x = 0.01l, where l is the length of a single link.  ... 
doi:10.1088/1367-2630/ab1142 fatcat:mhkytz5cvbahjmr7o3nlmr2xvu

Individual–Environment Interactions in Swimming: The Smallest Unit for Analysing the Emergence of Coordination Dynamics in Performance?

Brice Guignard, Annie Rouard, Didier Chollet, John Hart, Keith Davids, Ludovic Seifert
2017 Sports Medicine  
It is essential for sport scientists and practitioners to clearly identify the interactions that emerge between each individual swimmer and properties of an aquatic environment.  ...  Determining the impact of each swimmer's movements on fluid flow, and vice versa, is a major challenge.  ...  This multi-component parameter is composed of friction drag (forces acting tangential to the surface of the swimmer), form drag (dependent upon the shape or form of the swimmer) and wave drag (attributable  ... 
doi:10.1007/s40279-017-0684-4 pmid:28181208 fatcat:dt2tfgjdpre6vjbttiiqiavlgu

Bacteria-inspired nanorobots with flagellar polymorphic transformations and bundling

Jamel Ali, U Kei Cheang, James D. Martindale, Mehdi Jabbarzadeh, Henry C. Fu, Min Jun Kim
2017 Scientific Reports  
This method of swimming has been mimicked in an artificial swimmer composed of streptavidin coated magnetic microparticle chains linked together through biotinylated DNAs, attached to an erythrocyte, and  ...  In particular, this method of propulsion has been extensively investigated for robotic swimmers, and the design and actuation of biomimetic micro-and nanoscale artificial flagella has been well established  ...  that that 65 , and thus the observed hookless bundling, possibly through flagellar buckling instability 66 , may be an alternative bundling mechanism for multi-flagellated artificial swimmers.  ... 
doi:10.1038/s41598-017-14457-y pmid:29074862 pmcid:PMC5658443 fatcat:3kbhvoyod5e3zdesgdai3wyvji

Can Magnetic Multilayers Propel Artificial Microswimmers Mimicking Sperm Cells?

François Alouges, Antonio DeSimone, Laetitia Giraldi, Marta Zoppello
2015 Soft Robotics  
We formulate and solve the equations governing the dynamics of a microscopic artificial swimmer composed of a head and of a tail made of a thin film of permanent magnetic material.  ...  Finally, we compare the propulsion mechanism (swimming 'gait') of our swimmer with that of sperm cells.  ...  , optimization, and motion planning stages.  ... 
doi:10.1089/soro.2015.0007 fatcat:7je3smeka5bgdifhoky65zfcre

Microfluidics for Microswimmers: Engineering Novel Swimmers and Constructing Swimming Lanes on the Microscale, a Tutorial Review

Priyanka Sharan, Audrey Nsamela, Sasha Cai Lesher-Pérez, Juliane Simmchen
2021 Small  
This paper provides an updated review of recent advances in microfluidics applied to artificial and biohybrid microswimmers.  ...  First, microfluidics offer simple and relatively low-cost devices for high-fidelity production of microswimmers made of organic and inorganic materials in a variety of shapes and sizes.  ...  influence on artificial swimmers has also grown.  ... 
doi:10.1002/smll.202007403 pmid:33949106 fatcat:6zihpenij5hapnwphowtnq7eme

Millimeter-scale flexible robots with programmable three-dimensional magnetization and motions

Tianqi Xu, Jiachen Zhang, Mohammad Salehizadeh, Onaizah Onaizah, Eric Diller
2019 Science Robotics  
Moreover, a 3D magnetization profile allows higher-order and multi-axis bending, large-angle bending, and combined bending and torsion in one sheet of polymer, creating previously unachievable shape changes  ...  and microrobotic locomotion mechanisms such as multi-arm power grasping and multi-legged paddle crawling.  ...  (F) Path following error of a magnetic swimmer, corresponding to the path shown in (E). Fig. 5 . 5 Untethered multi-arm magnetic microgripper.  ... 
doi:10.1126/scirobotics.aav4494 pmid:33137716 fatcat:6vaj4ys4kbdi7dty77535hwof4

Application of Virtual Reality Technology in Swimming Teaching

Han Guo
2016 International Journal of Emerging Technologies in Learning (iJET)  
Swimming is one of the most popular spots among college students, though it is hard to master.  ...  A physical model and the software framework of the virtual reality system was proposed.  ...  VR is a type of synthetic integration technique, which integrates computer graphics, computer human interaction, sensor technique, artificial intelligence, robotique, etc. and features with multi-sensing  ... 
doi:10.3991/ijet.v11i11.6246 fatcat:u7japh7zmrb6zdb2ok6zwcvo3y

Mini and Micro Propulsion for Medical Swimmers

JianFeng, Sung Cho
2014 Micromachines  
This paper reviews the recent ideas and developments of these types of self-propelling devices, ranging from the millimeter scale down to the micro and even the nano scale.  ...  and transportation of bio-materials and drugs, bio-sensing, and bio-surgery.  ...  Conflicts of Interest The authors declare no conflict of interest. References  ... 
doi:10.3390/mi5010097 fatcat:b4p5tyxbyzcoff5uocvauz4xiq

Mesoscopic magnetic systems: from fundamental properties to devices [article]

Laura J. Heyderman, Julie Grollier, Christopher H. Marrows, Paolo Vavassori, Dirk Grundler, Denys Makarov, Salvador Pané
2021 arXiv   pre-print
Here we review various themes of current research within mesoscopic magnetic systems.  ...  The authors suggest that exploitation of these swimming regimes could be used for better control of swarms, and importantly, show that artificial swimmers can adapt their swimming behaviours to a certain  ...  optimizing materials, either doping a bulk single crystal or adjusting interface properties of thin films and multilayers.  ... 
arXiv:2107.09563v1 fatcat:qi5km2dxzvcmzitl6jogcwubia

Towards Automated Swimming Analytics Using Deep Neural Networks [article]

Timothy Woinoski and Alon Harell and Ivan V. Bajic
2020 arXiv   pre-print
There has not been much work on swimmer tracking or the creation of a swimmer database for machine learning purposes.  ...  The result is a guide to the creation of a comprehensive collection of swimming data suitable for training swimmer detection and tracking systems.  ...  This means that all examples of objects have adequate variance in terms of object size, orientation, pose, illumination, position and occlusion.  ... 
arXiv:2001.04433v1 fatcat:whrd2jiowvbv3ldu5xvvo4odz4

BERT-INT:A BERT-based Interaction Model For Knowledge Graph Alignment

Xiaobin Tang, Jing Zhang, Bo Chen, Yang Yang, Hong Chen, Cuiping Li
2020 Proceedings of the Twenty-Ninth International Joint Conference on Artificial Intelligence  
Instead of aggregating neighbors, we compute the interactions between neighbors which can capture fine-grained matches of neighbors. Similarly, the interactions of attributes are also modeled.  ...  Experimental results show that our model significantly outperforms the best state-of-the-art methods by 1.9-9.7% in terms of HitRatio@1 on the dataset DBP15K.  ...  Proceedings of the Twenty-Ninth International Joint Conference on Artificial Intelligence  ... 
doi:10.24963/ijcai.2020/435 dblp:conf/ijcai/LaiZLH20 fatcat:yt6js3z3pbaolnd2jglzuqa2xy
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