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Guanjun Bao, Hui Fang, Lingfeng Chen, Yuehua Wan, Fang Xu, Qinghua Yang, Libin Zhang
Soft robotics is of growing interest in the robot community as well as in public media, and there is an increase in the quality and quantity of publications related to this topic. To formally elaborate this growth, we have used a bibliometric analysis to evaluate the publications in the field from 1990 to 2017 based on the Science Citation Index Expanded database. We present a detailed overview and discussion based on keywords, citation, h-index, year, journal, institution, country, author, and review articles...
May 21, 2018: Soft Robotics
B Eidel, A Gote, A Ohrndorf, H-J Christ
The present work proposes a simple, novel fixation concept for short stem hip endoprostheses, which preserves the pre-surgery force flow through femoral bone to an unprecedented extent. It is demonstrated by finite element analyses that a standard implant model endowed with minor geometrical changes can overcome bone loading reduction and can achieve almost physiological conditions. The numerical results underpin that the key aspect of the novel, so-called "collar cortex compression concept CO4 " is the direct, almost full load transmission from the implant collar to the resected femur cortex, which implies that the implant stem must be smooth and therefore interacts mainly by normal contact with the surrounding bone...
May 14, 2018: Medical Engineering & Physics
Peng Guo-Hua, Wei Wang-Yuan, Qian Ke, Hu Zhu-Hua, Li Shi-Zhu, Guo Jia-Gang, Yu Qing
OBJECTIVE: To develop a bionic animal skin and evaluate its detective effect of Schistosoma japonicum cercariae so as to provide a new technique for the monitoring of the schistosome susceptibility water body. METHODS: A bionic animal skin was made with pigskin and the experiments were carried out for evaluating its detective effects of S. japonicum cercariae in laboratory and simulate fields, and at the same time, the sentinel mouse method was used as the control...
April 17, 2018: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
Yue She, Defa Li, Shuai Zhang
The role of phosphorus (P) in swine nutrition has been taken on new significance in recent years. Methods to determine the available phosphorus (AP) content of swine feeds include relative bioavailability (RBV), apparent total tract digestibility (ATTD), standardized total tract digestibility (STTD), and true total tract digestibility (TTTD). The RBV of P is determined by measuring bone ash or bone P, whereas the ATTD of P is determined by calculating the difference between P intake and P excretion in feces...
June 2017: Animal nutrition
Jayson V Pagaduan, Anil Bhatta, Lewis H Romer, David H Gracias
Interfacing nano/microscale elements with biological components in 3D contexts opens new possibilities for mimicry, bionics, and augmentation of organismically and anatomically inspired materials. Abiotic nanoscale elements such as plasmonic nanostructures, piezoelectric ribbons, and thin film semiconductor devices interact with electromagnetic fields to facilitate advanced capabilities such as communication at a distance, digital feedback loops, logic, and memory. Biological components such as proteins, polynucleotides, cells, and organs feature complex chemical synthetic networks that can regulate growth, change shape, adapt, and regenerate...
May 10, 2018: Small
Inderjeet Singh, Yacine Amara, Achille Melingui, Pushparaj Mani Pathak, Rochdi Merzouki
Research on continuum manipulators is increasingly developing in the context of bionic robotics because of their many advantages over conventional rigid manipulators. Due to their soft structure, they have inherent flexibility, which makes it a huge challenge to control them with high performances. Before elaborating a control strategy of such robots, it is essential to reconstruct first the behavior of the robot through development of an approximate behavioral model. This can be kinematic or dynamic depending on the conditions of operation of the robot itself...
May 10, 2018: Soft Robotics
Weiying Fang, Tingyu Gu, Yi Liu, Lan Xu, Yuelei Chen
Tissue engineering has emerged as a promising approach for the repair and functional reconstruction of damaged tissues. The bionic and intelligentized scaffolds provide the structural support for cell growth and differentiation as well as tissue regeneration. The surface properties of the biological material implant, the nanotopology in particular, become key aspects in determining the success of the implant. Mesenchymal stem cells (MSC) are widely favored by researchers as the seed cells in tissue engineering...
February 1, 2018: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
Jianping Shi, Liya Zhu, Lan Li, Zongan Li, Jiquan Yang, Xingsong Wang
In the field of bone defect repair, gradient porous scaffolds have received increased attention because they provide a better environment for promoting tissue regeneration. In this study, we propose an effective method to generate bionic porous scaffolds based on the TPMS (triply periodic minimal surface) and SF (sigmoid function) methods. First, cortical bone morphological features (e.g., pore size and distribution) were determined for several regions of a rabbit femoral bone by analyzing CT-scans. A finite element method was used to evaluate the mechanical properties of the bone at these respective areas...
May 9, 2018: Scientific Reports
Qi Chen, Xianmin Zhang, Benliang Zhu
Understanding the optimal designs in nature is critical in bionics. This paper presents a method for designing the configuration of fusiform muscle with a maximum contractile displacement based on topology optimization methods. A nearly incompressible continuum constitutive model of skeletal muscle is utilized. The contractile displacement from the relaxed state to the contracted state is regarded as the objective function. To handle the numerical difficulties that result from the existence of element density, an energy interpolation equation is employed, and a modification of the constitutive model of skeletal muscle is proposed...
May 9, 2018: International Journal for Numerical Methods in Biomedical Engineering
Hao-Bo Jiang, Yu-Qing Liu, Yong-Lai Zhang, Yan Liu, Xiu-Yan Fu, Dong-Dong Han, Yun-Yun Song, Luquan Ren, Hong-Bo Sun
Controlling the wettability of graphene and graphene derivatives is critical for broader applications. However, the dynamic dewetting performance of graphene is usually overlooked. Currently, superhydrophobic graphene with an anisotropic wettability is rare. Inspired by natural reed leaves, we report an ingenious fabrication process combining photolithography and laser holography technologies to create biomimetic graphene surfaces that demonstrate anisotropic wettability along two directions of grooved hierarchical structures, which are similar to reed leaf veins...
May 3, 2018: ACS Applied Materials & Interfaces
Genwen Mao, Zili Qin, Zheng Li, Xiang Li, Yusheng Qiu, Weiguo Bian
The goal of this study was to develop a bionic fixation device based on the use of a tricalcium phosphate/polyether ether ketone anchor and harvesting of the ulnar carpal flexor muscle tendon for application as a ligament graft in a beagle anterior cruciate ligament (ACL) reconstruction model, with the goal of accelerating the ligament graft-to-bone tunnel healing and providing a robust stability through exploration of this new kind of autologous ligament graft. The safety and efficacy of this fixation device were explored 3 and 6 months after surgery in a beagle ACL reconstruction model using biomechanical tests and comprehensive histological observation...
May 2, 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
Qian Zhao, Yunhong Liang, Qingping Liu, Zhihui Zhang, Zhenglei Yu, Luquan Ren
Based on microstructure characteristics of Meretrix lusoria shell and Rapana venosa shell, bionic coupling layered B₄C/5083Al composites with different layered structures and hard/soft combination models were fabricated via hot pressed sintering. The simplified bionic coupling models with hard and soft layers were similar to layered structure and hardness tendency of shells, guiding the bionic design and fabrication. B₄C/5083Al composites with various B₄C contents and pure 5083Al were treated as hard and soft layers, respectively...
April 26, 2018: Materials
Q Liu, J Z Wang
Experimental data have shown that inherent bursting of the neuron plays an important role in the generation of rhythmic movements in spinal networks. Based on the mechanism that the spinal neurons of a lamprey generate this inherent bursting, this paper builds a simplified inherent bursting neuron model. A new locomotion control neural network is built that takes advantage of this neuron model and its performance is analyzed mathematically and by numerical simulation. From these analyses, it is found that the new control networks have no restriction on their topological structure for generating the oscillatory outputs...
April 26, 2018: Biological Cybernetics
Yansen Wang, Xueling Yuan, Kun Yu, Haoye Meng, Yudong Zheng, Jiang Peng, Shibi Lu, Xiaotong Liu, Yajie Xie, Kun Qiao
Cartilage has rather limited capacities for self-repair and regeneration. To repair complexly shaped cartilage tissue defects, we propose the application of microtissues fabricated from bone marrow-derived mesenchymal stem cells (BMSCs) cultured in natural bionic nanofibrous microcarriers (NF-MCs). The NF-MCs were structurally and functionally designed to mimic natural extracellular matrix (ECM) by crosslinking dialdehyde bacterial cellulose (DBC) with DL-allo-hydroxylysine (DHYL) and complexing chitosan (CS) with DHYL through electrostatic interactions...
April 16, 2018: Biomaterials
Yang Zhao, Di Xu, Jiazheng Sheng, Qinglong Meng, Dezhi Wu, Lingyun Wang, Jingjing Xiao, Wenlong Lv, Qinnan Chen, Daoheng Sun
During the last decades, the ionic polymer-metal composite (IPMC) received much attention because of its potential capabilities, such as large displacement and flexible bending actuation. In this paper, a biomimetic flapping air vehicle was proposed by combining the superiority of ionic polymer metal composite with the bionic beetle flapping principle. The blocking force was compared between casted IPMC and IPMC. The flapping state of the wing was investigated and the maximum displacement and flapping angle were measured...
2018: Applied Bionics and Biomechanics
Binbin Zhang, Yang Li, Gaoshang Wang, Zhidong Jia, Haiyan Li, Qing Peng, Yi Gao
Liver is one of the most important organ in the body. But there are many limitations about liver transplantation for liver failure. It is quite important to develop the xenogeneic biological liver for providing an alternation to transplantation or liver regeneration. In this paper, we proposed a method to construct a novel kind of agarose 3D-culture concave microwell array for spheroids formation of hepatic cells. Using the 3D printing method, the microwell array was fabricated with an overall size of 6.4 mm × 6...
April 19, 2018: Journal of Materials Science. Materials in Medicine
Nazita Taghavi, Greg R Luecke, Nicholas D Jeffery
In this research, we describe a new balancing device used to stabilize the rear quarters of a patient dog with spinal cord injuries. Our approach uses inertial measurement sensing and direct leg actuation to lay a foundation for eventual muscle control by means of direct functional electrical stimulation (FES). During this phase of development, we designed and built a mechanical test-bed to develop the control and stimulation algorithms before we use the device on our animal subjects. We designed the bionic test-bed to mimic the typical walking gait of a dog and use it to develop and test the functionality of the balancing device for stabilization of patient dogs with hindquarter paralysis...
April 18, 2018: Sensors
Carla J Abbott, David A X Nayagam, Chi D Luu, Stephanie B Epp, Richard A Williams, Cesar M Salinas-LaRosa, Joel Villalobos, Ceara McGowan, Mohit N Shivdasani, Owen Burns, Jason Leavens, Jonathan Yeoh, Alice A Brandli, Patrick C Thien, Jenny Zhou, Helen Feng, Chris E Williams, Robert K Shepherd, Penelope J Allen
Purpose: Following successful clinical outcomes of the prototype suprachoroidal retinal prosthesis, Bionic Vision Australia has developed an upgraded 44-channel suprachoroidal retinal prosthesis to provide a wider field of view and more phosphenes. The aim was to evaluate the preclinical passive safety characteristics of the upgraded electrode array. Methods: Ten normal-sighted felines were unilaterally implanted with an array containing platinum electrodes (44 stimulating and 2 returns) on a silicone carrier near the area centralis...
March 1, 2018: Investigative Ophthalmology & Visual Science
Guiqiang Pu, Dongxu Zhang, Xiang Mao, Zhen Zhang, Huan Wang, Xingming Ning, Xiaoquan Lu
We provide here, for the first time, a new interfacial electron-induced electrochemiluminescence (IEIECL) system, realizing bionic construction of bioluminescence (BL) by exploiting electrochemiluminescence (ECL) and ITIES (the interface between two immiscible electrolyte solutions). Significantly, the superiority of the IEIECL system is embodied with the solution of the two bottlenecks encountered in the conventional ECL innovation. That are (a) the applications of hydrophobic luminophores in more commonly used aqueous solution are inhibited tremendously due to the poor inherent solubility and the instability of radicals; (b) the analytes, insoluble in water, are hard to be discovered in aqueous system because of too little content...
April 3, 2018: Analytical Chemistry
Qun Hao, Zihan Wang, Jie Cao, Fanghua Zhang
Based on bionic compound eye and human foveated imaging mechanisms, a hybrid bionic image sensor (HBIS) is proposed in this paper to extend the field of view (FOV) with high resolution. First, the hybrid bionic imaging model was developed and the structure parameters of the HBIS were deduced. Second, the properties of the HBIS were simulated, including FOV extension, super-resolution imaging, foveal ratio and so on. Third, a prototype of the HBIS was developed to validate the theory. Imaging experiments were carried out, and the results are in accordance with the simulations, proving the potential of the HBIS for large FOV and high-resolution imaging with low cost...
March 30, 2018: Sensors
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