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Applied Bionics and Biomechanics

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https://www.readbyqxmd.com/read/29670666/passive-cushiony-biomechanics-of-head-protection-in-falling-geckos
#1
Hao Wang, Wenbo Wang, Yi Song, Lei Cai, Zhendong Dai
Gekko geckos are capable to crawl on the steep even on upside-down surfaces. Such movement, especially at great altitude, puts them at high risks of incidentally dropping down and inevitable body or head impactions, though they may trigger air-righting reaction (ARR) to attenuate the landing shocks. However, the air-righting ability (ARA) in Gekko geckos is not fully developed. The implementation of ARR in some geckos is quite slow; and for those without tails, the ARR is even unobservable. Since ARA is compromised in Gekko geckos , there must be some other mechanisms responsible for protecting them from head injuries during falls...
2018: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29670665/research-on-biomimetic-models-and-nanomechanical-behaviour-of-membranous-wings-of-chinese-bee-apis-cerana-cerana-fabricius
#2
Yanru Zhao, Dongsheng Wang, Jin Tong, Jiyu Sun, Jin Zhang
The structures combining the veins and membranes of membranous wings of the Chinese bee Apis cerana cerana Fabricius into a whole have excellent load-resisting capacity. The membranous wings of Chinese bees were taken as research objects and the mechanical properties of a biomimetic model of membranous wings as targets. In order to understand and learn from the biosystem and then make technical innovation, the membranous wings of Chinese bees were simulated and analysed with reverse engineering and finite element method...
2018: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29581728/design-of-a-conceptual-bumper-energy-absorber-coupling-pedestrian-safety-and-low-speed-impact-requirements
#3
Fuhao Mo, Siqi Zhao, Chuanhui Yu, Zhi Xiao, Shuyong Duan
The car front bumper system needs to meet the requirements of both pedestrian safety and low-speed impact which are somewhat contradicting. This study aims to design a new kind of modular self-adaptive energy absorber of the front bumper system which can balance the two performances. The X-shaped energy-absorbing structure was proposed which can enhance the energy absorption capacity during impact by changing its deformation mode based on the amount of external collision energy. Then, finite element simulations with a realistic vehicle bumper system are performed to demonstrate its crashworthiness in comparison with the traditional foam energy absorber, which presents a significant improvement of the two performances...
2018: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29515651/innovative-design-and-performance-evaluation-of-bionic-imprinting-toothed-wheel
#4
Zhihong Zhang, Xiaoyang Wang, Jin Tong, Carr Stephen
A highly efficient soil-burrowing dung beetle possesses an intricate outer contour curve on its foreleg end-tooth. This study was carried out based on evidence that this special outer contour curve has the potential of reducing soil penetration resistance and could enhance soil-burrowing efficiency. A toothed wheel is a typical agricultural implement for soil imprinting, to increase its working efficiency; the approach of the bionic geometrical structure was utilized to optimize the innovative shape of imprinting toothed wheel...
2018: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29515650/computer-assisted-optimization-of-the-acetabular-rotation-in-periacetabular-osteotomy-using-patient-s-anatomy-specific-finite-element-analysis
#5
Sung-Jae Park, Sung-Jae Lee, Wen-Ming Chen, Jung-Hong Park, Yong-Soo Cho, Taejin Shin, Soon-Yong Kwon
Periacetabular osteotomy (PAO) is a complex surgical procedure to restore acetabular coverage in the dysplastic hip, and the amount of acetabular rotation during PAO plays a key role. Using computational simulations, this study assessed the optimal direction and amount of the acetabular rotation in three dimensions for a patient undergoing PAO. Anatomy-specific finite element (FE) models of the hip were constructed based on clinical CT images. The calculated acetabular rotation during PAO were 9.7°, 18°, and 4...
2018: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29515649/human-hand-motion-analysis-during-different-eating-activities
#6
Zakia Hussain, Norsinnira Zainul Azlan, Arif Zuhairi Bin Yusof
The focus of this research is to analyse both human hand motion and force, during eating, with respect to differing food characteristics and cutlery (including a fork and a spoon). A glove consisting of bend and force sensors has been used to capture the motion and contact force exerted by fingers during different eating activities. The Pearson correlation coefficient has been used to show that a significant linear relationship exists between the bending motion of the fingers and the forces exerted during eating...
2018: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29515648/analysis-of-the-impact-of-configuration-of-the-stabilisation-system-for-femoral-diaphyseal-fractures-on-the-state-of-stresses-and-displacements
#7
Jakub J Słowiński, Konrad Kudłacik
Introduction: The treatment of femoral diaphyseal fractures by intramedullary nailing has become a common procedure in orthopaedic surgery. The purpose of this numerical simulation was to present how the changes in configuration of the stabilisation system can affect the stress and displacement state in the bone tissue and implanted device. Material and Methods: The numerical comparison of the stabilisation variants for the type 32-A2 femoral diaphyseal fracture (according to the AO classification) performed by using the Charfix2 (ChM®) anatomical nail locked in a number of chosen ways...
2018: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29487626/geometric-modeling-of-cellular-materials-for-additive-manufacturing-in-biomedical-field-a-review
#8
REVIEW
Gianpaolo Savio, Stefano Rosso, Roberto Meneghello, Gianmaria Concheri
Advances in additive manufacturing technologies facilitate the fabrication of cellular materials that have tailored functional characteristics. The application of solid freeform fabrication techniques is especially exploited in designing scaffolds for tissue engineering. In this review, firstly, a classification of cellular materials from a geometric point of view is proposed; then, the main approaches on geometric modeling of cellular materials are discussed. Finally, an investigation on porous scaffolds fabricated by additive manufacturing technologies is pointed out...
2018: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29527117/experimental-investigation-of-aerodynamics-of-feather-covered-flapping-wing
#9
Wenqing Yang, Bifeng Song
Avian flight has an outstanding performance than the manmade flapping wing MAVs. Considering that the feather is light and strong, a new type of the flapping wing was designed and made, whose skeleton is carbon fiber rods and covered by goose feathers as the skin. Its aerodynamics is tested by experiments and can be compared with conventional artificial flapping wings made of carbon fiber rods as the skeleton and polyester membrane as the skin. The results showed that the feathered wing could generate more lift than the membrane wing in the same flapping kinematics because the feathered wing can have slots between feathers in an upstroke process, which can mainly reduce the negative lift...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29463956/low-dimensional-motor-control-representations-in-throwing-motions
#10
Ana Lucia Cruz Ruiz, Charles Pontonnier, Georges Dumont
In this study, we identified a low-dimensional representation of control mechanisms in throwing motions from a variety of subjects and target distances. The control representation was identified at the kinematic level in task and joint spaces, respectively, and at the muscle activation level using the theory of muscle synergies. Representative features of throwing motions in all of these spaces were chosen to be investigated. Features were extracted using factorization and clustering techniques from the muscle data of unexperienced subjects (with different morphologies and physical conditions) during a series of throwing tasks...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29440865/efficacy-of-palatal-applications-on-fracture-resistance-of-reattached-maxillary-central-incisors-an-in-vitro-study
#11
İhsan Yikilgan, Nagihan Guven, Cemile Kedıcı Alp, Emre Tokar, Ozgur Topuz, Hanife Kamak
The purpose of this study was to evaluate the effects of different palatal applications on fracture strength of the fractured anterior tooth. Sixty caries-free human maxillary incisors were used. Endodontic treatments of the teeth were performed. Then, the teeth were divided randomly into five groups ( n = 12). Crowns of all teeth in groups A-D were cut with diamond discs at a fixed distance of 3 mm from the incisal margin in a plane normal to the buccal surface. In all groups, coronal fragments were reattached to the remaining teeth by bonding with hybrid composite resin...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29440864/validation-of-material-algorithms-for-femur-remodelling-using-medical-image-data
#12
Shitong Luo, Xingquan Shen, Xin Bai, Jing Bai, Jianning Han, Yu Shang
The aim of this study is the utilization of human medical CT images to quantitatively evaluate two sorts of "error-driven" material algorithms, that is, the isotropic and orthotropic algorithms, for bone remodelling. The bone remodelling simulations were implemented by a combination of the finite element (FE) method and the material algorithms, in which the bone material properties and element axes are determined by both loading amplitudes and daily cycles with different weight factor. The simulation results showed that both algorithms produced realistic distribution in bone amount, when compared with the standard from CT data...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29410600/additive-manufacturing-techniques-for-the-reconstruction-of-3d-fetal-faces
#13
Domenico Speranza, Daniela Citro, Francesco Padula, Barbara Motyl, Federica Marcolin, Michele Calì, Massimo Martorelli
This paper deals with additive manufacturing techniques for the creation of 3D fetal face models starting from routine 3D ultrasound data. In particular, two distinct themes are addressed. First, a method for processing and building 3D models based on the use of medical image processing techniques is proposed. Second, the preliminary results of a questionnaire distributed to future parents consider the use of these reconstructions both from an emotional and an affective point of view. In particular, the study focuses on the enhancement of the perception of maternity or paternity and the improvement in the relationship between parents and physicians in case of fetal malformations, in particular facial or cleft lip diseases...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29386882/cell-colonization-ability-of-a-commercialized-large-porous-alveolar-scaffold
#14
S Lemonnier, T Bouderlique, S Naili, H Rouard, J Courty, N Chevallier, P Albanese, T Lemaire
The use of filling biomaterials or tissue-engineered large bone implant-coupling biocompatible materials and human bone marrow mesenchymal stromal cells seems to be a promising approach to treat critical-sized bone defects. However, the cellular seeding onto and into large porous scaffolds still remains challenging since this process highly depends on the porous microstructure. Indeed, the cells may mainly colonize the periphery of the scaffold, leaving its volume almost free of cells. In this study, we carry out an in vitro study to analyze the ability of a commercialized scaffold to be in vivo colonized by cells...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29375244/elastic-modulus-of-osteoporotic-mouse-femur-based-on-femoral-head-compression-test
#15
Chang-Soo Chon, Hui-Suk Yun, Han Sung Kim, Cheolwoong Ko
A biomechanical test is a good evaluation method that describes the structural, functional, and pathological differences in the bones, such as osteoporosis and fracture. The tensile test, compression test, and bending test are generally performed to evaluate the elastic modulus of the bone using mice. In particular, the femoral head compression test is mainly used for verifying the osteoporosis change of the femoral neck. This study conducted bone mineral density analysis using in vivo microcomputed tomography (micro-CT) to observe changes in osteoporosis over time...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29358893/kinect-v2-performance-assessment-in-daily-life-gestures-cohort-study-on-healthy-subjects-for-a-reference-database-for-automated-instrumental-evaluations-on-neurological-patients
#16
Alessandro Scano, Andrea Chiavenna, Matteo Malosio, Lorenzo Molinari Tosatti
Background: The increase of sanitary costs related to poststroke rehabilitation requires new sustainable and cost-effective strategies for promoting autonomous and dehospitalized motor training. In the Riprendo@Home and Future Home for Future Communities research projects, the promising approach of introducing low-cost technologies that promote home rehabilitation is exploited. In order to provide reliable evaluation of patients, a reference database of healthy people's performances is required and should consider variability related to healthy people performances...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29311756/a-survey-of-bioinspired-jumping-robot-takeoff-air-posture-adjustment-and-landing-buffer
#17
REVIEW
ZiQiang Zhang, Jing Zhao, HanLong Chen, DianSheng Chen
A bioinspired jumping robot has a strong ability to overcome obstacles. It can be applied to the occasion with complex and changeable environment, such as detection of planet surface, postdisaster relief, and military reconnaissance. So the bioinspired jumping robot has broad application prospect. The jumping process of the robot can be divided into three stages: takeoff, air posture adjustment, and landing buffer. The motivation of this review is to investigate the research results of the most published bioinspired jumping robots for these three stages...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29259395/cervical-spine-mechanism-for-reproduction-of-the-biomechanical-behaviours-of-the-human-neck-during-rotation-traction-manipulation
#18
Yuancan Huang, Shuai Li, Minshan Feng, Liguo Zhu
Rotation-traction (RT) manipulation is a commonly used physical therapy procedure in TCM (traditional Chinese medicine) for cervical spondylosis. This procedure temporarily separates the C3 and C4 cervical vertebrae from each other when a physician applies a jerky action while the neck is voluntarily turned by the patient to a specific position as instructed by the physician, where the cervical vertebrae are twisted and locked. However, a high rate of cervical injury occurs due to inexperienced physician interns who lack sufficient training...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29238158/full-step-cycle-kinematic-and-kinetic-comparison-of-barefoot-walking-and-a-traditional-shoe-walking-in-healthy-youth-insights-for-barefoot-technology
#19
Yi Xu, Qinghua Hou, Chuhuai Wang, Andrew J Sellers, Travis Simpson, Bradford C Bennett, Shawn D Russell
Objective: Barefoot technology shoes are becoming increasingly popular, yet modifications are still needed. The present study aims to gain valuable insights by comparing barefoot walking to neutral shoe walking in a healthy youth population. Methods: 28 healthy university students (22 females and 6 males) were recruited to walk on a 10-meter walkway both barefoot and in neutral running shoes at their comfortable walking speed. Full step cycle kinematic and kinetic data were collected using an 8-camera motion capture system...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29234219/concept-and-design-of-a-3d-printed-support-to-assist-hand-scanning-for-the-realization-of-customized-orthosis
#20
Gabriele Baronio, Paola Volonghi, Alberto Signoroni
In the rehabilitation field, the use of additive manufacturing techniques to realize customized orthoses is increasingly widespread. Obtaining a 3D model for the 3D printing phase can be done following different methodologies. We consider the creation of personalized upper limb orthoses, also including fingers, starting from the acquisition of the hand geometry through accurate 3D scanning. However, hand scanning procedure presents differences between healthy subjects and patients affected by pathologies that compromise upper limb functionality...
2017: Applied Bionics and Biomechanics
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