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Complementary Methods to Acquire the Kinematics of Swimming Snakes:A Basis to Design Bio-inspired Robots

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Journal of Bionic Engineering 2023年第2期20卷 668-682页

作者： Elie Gautreau Xavier Bonnet Tom Fox Guillaume Fosseries Valéry Valle Anthony Herrel Med Amine Laribi Department of GMSC University of PoitiersISAE-ENSMACNRSPPRIME UPR 3346PoitiersFrance CEBC Center for Biological Studies of Chizé CNRS and University of la RochelleVilliers en BoisFrance MNHN National Museum of Natural History CNRSParisFrance

The vast diversity of morphologies,body size,and lifestyles of snakes represents an important source of information that can be used to derive bio-inspired robots through a biology-push and pull process.An understanding of the detailed kinematics of swimming snakes is a fundamental prerequisite to conceive and design bio-inspired aquatic snake robots.However,only limited information is available on the kinematics of swimming snake.Fast and accurate methods are needed to fill this knowledge gap.In the present paper,three existing methods were compared to test their capacity to characterize the kinematics of swimming snakes.(1)Marker tracking(Deftac),(2)Markerless pose estimation(DeepLabCut),and(3)Motion capture were considered.(4)We also designed and tested an automatic video processing method.All methods provided different albeit complementary data sets;they also involved different technical issues in terms of experimental conditions,snake manipulation,or processing resources.Marker tracking provided accurate data that can be used to calibrate other methods.Motion capture posed technical difficulties but can provide limited 3D data.Markerless pose estimation required deep learning(thus time)but was efficient to extract the data under various experimental conditions.Finally,automatic video processing was particularly efficient to extract a wide range of data useful for both biology and robotics but required a specific experimental setting.

关键词： Locomotion Image processing Motion capture Kinematic analysis Snake robot Biomimicry DeepLabCut

Potential strategies offered by animals to implement in buildings' energy performance: Theory and practice

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Frontiers of Architectural Research 2019年第1期8卷 17-31页

作者： Cesar Martin-Gomez Amaia Zuazua-Ros Javier Bermejo-Busto Enrique Baquero Rafael Miranda Cristina Sanz Department of Building Construction Building Services and Structures Universidad de Navarra Pamplona 31009 Spain School of Sciences Department of Environmental Biology Universidad de Navarra Pamplona 31080 Spain

The strategies for thermal regulation and envir on mental control found in nature are countless. In this article, a parallelism between animals and building energy systems is defined in order to identJfy and emphasize the immediate opportunities that Biomimicry offers for future research. The motivation was the need to find alternative solutions to tackle problems mainly in the efficiency of heating, ventilation and cooling systems. Due to the wide range of possibilities offered by animals, this study is largely limited to the strategies that cold-blooded animals have developed through evolutionary adaptation to the environment. The method used for the an a lysis is based on a soluti on-based approach. Firstly, differe nt animal thermoregulation strategies are defined (biological domain). Then the strategy is an a lyzed and classified into three categories. This classification is esse ntial in order to formulate the parallelism with building systems (transfer phase). The final step is to identify the potential implementation (technological domain).This approach has been seen to be useful in creating new research opportunities based on Biomimicry. In addition, suitable solutions arising from multidisciplinary team research are presented as promising answers to the challenges that building energy systems face no wadays.

关键词： Biomimicry Building services Energy systems Passive design Multidisciplinary

Vascular-confined multi-passage discoidal nanoconstructs for the low-dose docetaxel inhibition of triple-negative breast cancer growth

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Nano Research 2022年第1期15卷 482-491页

作者： Alessia Felici Daniele Di Mascolo Miguel Ferreira Simone Lauciello Luca Bono Andrea Armirotti Arunkumar Pitchaimani Anna Lisa Palange Paolo Decuzzi Laboratory of Nanotechnology for Precision Medicine Fondazione Istituto Italiano di TecnologiaGenoa 16163Italy Department of Informatics BioengineeringRobotics and System EngineeringUniversity of GenoaGenoa 16126Italy Nanochemistry Laboratory Fondazione Istituto Italiano di TecnologiaGenoa 16163Italy Analytical Chemistry Laboratory Fondazione Istituto Italiano di TecnologiaGenoa 16163Italy

Taxane efficacy in triple negative breast cancer(TNBC)is limited by insufficient tumor accumulation and severe off-target effects.Nanomedicines offer a unique opportunity to enhance the anti-cancer potency of this drug.Here,1,000 nm×400 nm discoidal polymeric nanoconstructs(DPN)encapsulating docetaxel(DTXL)and the near infrared compound Iipid-Cy5 were engineered.DPN were obtained by filling multiple times cylindrical wells in a poly(vinyl alcohol)template with a polymer mixture comprising poly(lactic-co-glycolic acid)(PLGA)and poly(ethylene glycol)diacrylate(PEG-DA)chains together with therapeutic and imaging agents.The resulting“multi-passage”DPN exhibited higher DTXL loading,Iipid-Cy5 stability,and stiffness as compared to the conventional"single-passage"approach.Confocal microscopy confirmed that DTXL-DPN were not taken up by MDA-MB-231 cells but would rather sit next to the cell membrane and slowly release DTXL thereof.Empty DPN had no toxicity on TNBC cells,whereas DTXL-DPN presented a cytotoxic potential comparable to free DTXL(IC_(50)=2.6 nM±1.0 nM vs.7.0 nM±1.09 nM at 72 h).In orthotopic murine models,DPN accumulated in TNBC more efficiently than free-DTXL.With only 2 mg/kg DTXL,intravenously administered every 2 days for a total of 13 treatments,DTXL-DPN induced tumor regression and were associated to an overall 80%survival rate as opposed to a 30%survival rate for free-DTXL,at 120 days.All untreated mice succumbed before 90 days.Collectively,this data demonstrates that vascular confined multi-passage DPN,biomimicking the behavior of circulating platelets,can efficiently deliver chemotherapeutic molecules to malignant tissues and effectively treat orthotopic TNBC at minimal taxane doses.

关键词： hydrogel particles template strategy vascular targeting Biomimicry cancer therapy

Laser Additive Manufacturing of Bio-inspired Metallic Structures

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Chinese Journal of Mechanical Engineering(Additive Manufacturing Frontiers) 2022年第1期1卷 28-38页

作者： Jiankai Yang Dongdong Gu Kaijie Lin Yicha Zhang Meng Guo Luhao Yuan Han Zhang Hongmei Zhang Jiangsu Provincial Engineering Laboratory for Laser Additive Manufacturing of High-Performance Metallic Components College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing 210016China ICB-COMM CNRS UMR 6303UTBM–Universitéde Technologie Belfort-MontbéliardSevenansFrance

High-performance/multifunctional metallic components primarily determine the service performance of equip-ment applied in the aerospace,aviation,and automobile industries.Organisms have developed structures with specific properties over millions of years of natural evolution,thereby providing inspiration for the design of high-performance structures to satisfy the increasing demands of modern industries.From the perspective of manufacturing,the ability of conventional processing technologies is inadequate for fabricating these complex structural configurations.By contrast,laser additive manufacturing(AM)is an effective method for fabricating complex metallic bio-inspired structures owing to its layer-by-layer deposition advantage.Herein,recent devel-opments in the laser AM of bio-inspired cellular,plate,and truss structures,as well as the materials used in laser AM for bio-inspired printing are briefly reviewed.The organisms being imitated include butterfly,Norway spruce,mantis shrimp,beetle,and water spider,which expand the diversity of multifunctional structures for laser AM.The mechanical properties and functions of laser-AM-processed bio-inspired structures are discussed.Additionally,the challenges,possible outcomes,and directions of utilizing laser AM technology to fabricate high-performance/multifunctional metallic bio-inspired structures in the future are outlined.

关键词： Laser additive manufacturing(AM) Laser powder bed fusion(LPBF) Bio-inspired Biomimicry Property Functionality

Design of biomimetic camouflage materials based on angiosperm leaf organs

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Science China(Technological Sciences) 2008年第11期51卷 1902-1910页

作者： LIU ZhiMing WU WenJian HU BiRu Department of Materials Engineering and Applied Chemistry College of Aerospace and Materials EngineeringNational University of Defense TechnologyChangsha 410073China

The micro structures and reflectance spectra of angiosperm leaves were compared with those of angiosperm petals. The study indicated that angiosperm leaf organs had identical micro structures and reflectance characteristics in the wave band of near infrared. Micro structures and compositions of leaf organs were the crucial factors influencing their reflectance spectra. The model of biomimetic materials based on angiosperm leaf organs was introduced and verified. From 300 to 2600 nm, the similarity coefficients of reflectance spectra of the foam containing water and Platanus Orientalis Linn. leaves were all above 0.969. The biomimetic camou- flage material exhibited almost the same reflectance spectra with those of green leaves in ultraviolet, visible and near infrared wave bands. And its "concolor and conspectrum" effect might take on reconnaissance of hyperspectral and ultra hy- perspectral imaging.

关键词： camouflage material Biomimicry leaf organ spectrum