Abstract:
:In this study we aim at investigating the applicability of underwater 3D motion capture based on submerged video cameras in terms of 3D accuracy analysis and trajectory reconstruction. Static points with classical direct linear transform (DLT) solution, a moving wand with bundle adjustment and a moving 2D plate with Zhang's method were considered for camera calibration. As an example of the final application, we reconstructed the hand motion trajectories in different swimming styles and qualitatively compared this with Maglischo's model. Four highly trained male swimmers performed butterfly, breaststroke and freestyle tasks. The middle fingertip trajectories of both hands in the underwater phase were considered. The accuracy (mean absolute error) of the two calibration approaches (wand: 0.96 mm - 2D plate: 0.73 mm) was comparable to out of water results and highly superior to the classical DLT results (9.74 mm). Among all the swimmers, the hands' trajectories of the expert swimmer in the style were almost symmetric and in good agreement with Maglischo's model. The kinematic results highlight symmetry or asymmetry between the two hand sides, intra- and inter-subject variability in terms of the motion patterns and agreement or disagreement with the model. The two outcomes, calibration results and trajectory reconstruction, both move towards the quantitative 3D underwater motion analysis.
journal_name
Comput Methods Biomech Biomed Enginauthors
Silvatti AP,Cerveri P,Telles T,Dias FA,Baroni G,Barros RMdoi
10.1080/10255842.2012.664637subject
Has Abstractpub_date
2013-01-01 00:00:00pages
1240-8issue
11eissn
1025-5842issn
1476-8259journal_volume
16pub_type
杂志文章abstract::When designing any rehabilitation, sportswear or exoskeleton device the mechanical behaviour of the body segment must be known, specifically the skin, because an excessive tissue strain may lead to ulceration and bedsores. To date, it is not known if the kinematic variability between subjects have an effect on the ski...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2019.1655549
更新日期:2019-11-01 00:00:00
abstract::Work-related musculoskeletal disorders (WMSDs) have become increasingly common among dentists and initiate a series of events that could result in a career ending. This study aims to construct a system for predicting and preventing WMSD among dentists. We used Bayesian network (BN) that describes the mutual relationsh...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2012.672565
更新日期:2014-01-01 00:00:00
abstract::The purpose of this study was to identify one or more performance-based criteria that may be used to generate predictive optimal control simulations of submaximal pedaling. Two-legged pedaling simulations were generated based on minimizing muscle activation, muscle stress, metabolic energy, time derivative of muscle f...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2018.1522535
更新日期:2019-01-01 00:00:00
abstract::Mechanical stresses develop within vocal fold (VF) soft tissues due to phonation-associated vibration and collision. These stresses in turn affect the hydration of VF tissue and thus influence voice health. In this paper, high-fidelity numerical computations are described, taking into account fully 3D geometry, realis...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2013.772591
更新日期:2014-01-01 00:00:00
abstract::Big data and its approaches are generally helpful for healthcare and biomedical sectors for predicting the disease. For trivial symptoms, the difficulty is to meet the doctors at any time in the hospital. Thus, big data provides essential data regarding the diseases on the basis of the patient's symptoms. For several ...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2020.1869726
更新日期:2021-01-11 00:00:00
abstract::Numerical predictions of blood flow patterns and hemodynamic stresses in Abdominal Aortic Aneurysms (AAAs) are performed in a two-aneurysm, axisymmetric, rigid wall model using the spectral element method. Homogeneous, Newtonian blood flow is simulated under steady conditions for the range of Reynolds numbers 10 < or ...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/1025584021000009742
更新日期:2002-08-01 00:00:00
abstract::The 2D shape of the lumbar spine in the sagittal plane can be determined from lordosis angles measured between the corresponding end-plates of the vertebral bodies or by using an active shape model (ASM) of the vertebral body outline. The ASM was previously shown to be a more efficient and reliable method, but its acc...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2010.518962
更新日期:2012-01-01 00:00:00
abstract::Factors related to micromovements at bone-implant interface have been studied because they are considered adverse to osseointegration. Simplifications are commonly observed in these FEA evaluations. The aim of this study was to clarify the influence of FEA parameters (boundary conditions and bone properties) on the st...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2017.1309394
更新日期:2017-06-01 00:00:00
abstract::The goal and clinical relevance of this work was the development of closed formulas that are correct and simple enough for a fast decision making by the orthodontist in the daily praxis. This paper performs a parametric three-dimensional finite element linear analysis on a maxillary central incisor with a root of para...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840290032126
更新日期:2002-04-01 00:00:00
abstract::Haemodynamics is believed to play an important role in the initiation, growth and rupture of intracranial aneurysms. In this context, computational haemodynamics has been extensively used in an effort to establish correlations between flow variables and clinical outcome. It is common practice in the application of Dir...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840802654335
更新日期:2009-08-01 00:00:00
abstract::To extend the use of computational techniques like finite element analysis to clinical settings, it would be beneficial to have the ability to generate a unique model for every subject quickly and efficiently. This work is an extension of two previously developed mapped meshing tools that utilised force and displaceme...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2011.629614
更新日期:2013-01-01 00:00:00
abstract::Cell migration relies on traction forces in order to propel a cell. Several computational models have been developed that help explain the trajectory that cells take during migration, but little attention has been placed on traction forces during this process. Here, we investigated the spatiotemporal dynamics of cell ...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2011.554412
更新日期:2011-05-01 00:00:00
abstract::The aim of this work was to improve the constitutive model of the human mandible and dentition system by taking into account the non-linear material properties of the structural boney matrix that forms the human jaw bone or mandible. Due to the specific structure of the jaw bone the time dependence of the mechanical p...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840310001637257
更新日期:2003-10-01 00:00:00
abstract::This paper analyses the mechanical behaviour of a new reinforced anatomical post-systems (RAPS) for endodontic restoration. The composite restorative material (CRM) completely fills the root canal (as do the commonly used cast metal posts) and multiple prefabricated composite posts (PCPs) are employed as reinforcement...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840903065530
更新日期:2009-02-01 00:00:00
abstract::Monitoring of skin blood flow oscillations related with mechanical activity of vessels is a very useful modality during diagnosis of peripheral hemodynamic disorders. In this study, we developed a new model and technique for real-time conversion of skin temperature into skin blood flow oscillations, and vice versa. Th...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2019.1615058
更新日期:2019-09-01 00:00:00
abstract::In the present study, the free fall impact test in accordance with the EN1078 standard for certification of bicycle helmets is replicated using numerical simulations. The impact scenario is simulated using an experimentally validated, patient-specific head model equipped with and without a bicycle helmet. Head acceler...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2018.1511775
更新日期:2018-09-01 00:00:00
abstract::Biomechanical imaging techniques have been developed for soft tissue characterisation and detection of breast tumours. Harmonic motion imaging (HMI) uses a focused ultrasound technology to generate a harmonic radiation force in a localised region inside a soft tissue. The resulting dynamic response is used to map the ...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2012.736500
更新日期:2014-01-01 00:00:00
abstract::Rupture prediction of abdominal aortic aneurysms (AAAs) remains a clinical challenge. Finite element analysis (FEA) may allow for improved identification for intervention timing, but the method needs further substantiation. In this study, experimental photoelastic method and finite element techniques were compared usi...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2011.574618
更新日期:2012-01-01 00:00:00
abstract::A clear and rigorous definition of muscle moment-arms in the context of musculoskeletal systems modelling is presented, using classical mechanics and screw theory. The definition provides an alternative to the tendon excursion method, which can lead to incorrect moment-arms if used inappropriately due to its dependenc...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2013.818666
更新日期:2015-01-01 00:00:00
abstract::In order to have research on the deformation characteristics and mechanical properties of human red blood cells (RBCs), finite element models of RBC optical tweezers stretching and atomic force microscope (AFM) indentation were established. Non-linear elasticity of cell membrane was determined by using the neo-Hookean...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2020.1791836
更新日期:2020-11-01 00:00:00
abstract::Much attention has been devoted to how playground swing amplitudes are built up by swinger techniques, i.e. body actions. However, very little attention has been given to the requirements that such swinger techniques place on the swinger himself. The purpose of this study was to find out whether different swinger tech...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2011.572280
更新日期:2012-01-01 00:00:00
abstract::The International Society of Biomechanics (ISB) has recommended a standardisation for the motion reporting of almost all human joints. This study proposes an adaptation for the trapeziometacarpal joint. The definition of the segment coordinate system of both trapezium and first metacarpal is based on functional anatom...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840802459404
更新日期:2009-06-01 00:00:00
abstract::In this review, we provide an overview of the simulation techniques employed for modelling the flow of red blood cells (RBCs) in blood plasma. The scope of this review omits the fluid modelling aspect while focusing on other key components in the RBC-plasma model such as (1) describing the RBC deformation with shell-b...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章,评审
doi:10.1080/10255842.2013.783574
更新日期:2015-01-01 00:00:00
abstract::A two-dimensional time-dependent computational fluid dynamics model of the Circle of Willis has been developed. To simulate, not only the peripheral resistance of the cerebrovascular tree but also its auto-regulation function, a new "active" boundary condition has been defined and developed using control theory to pro...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840290032171
更新日期:2002-02-01 00:00:00
abstract::In order to investigate injury mechanisms, and to provide directions for road safety system improvements, the HUMOS project has lead to the development of a 3D finite element model of the human body in driving position. The model geometry was obtained from a 50th percentile adult male. It includes the description of a...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840310001606080
更新日期:2003-08-01 00:00:00
abstract::The flow effect on the concentration of platelet active substances in the vicinity of a mural microthrombus is investigated numerically. A three-dimensional model is employed in which the mural microthrombus is modelled as a semisphere attached to a plane surface. The description of the blood flow uses the three-dimen...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/01495739808936708
更新日期:1998-01-01 00:00:00
abstract::The objective of this study was to compare the performance of six validated brain finite element (FE) models to localized brain motion validation data in five experimental configurations. Model performance was measured using the objective metric CORA (CORrelation and Analysis), where higher ratings represent better co...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2017.1340462
更新日期:2017-09-01 00:00:00
abstract::This study is aimed at setting a method of experimental parameter estimation for large-deforming nonlinear viscoelastic continuous fibre-reinforced composite material model. Specifically, arterial tissue was investigated during experimental research and parameter estimation studies, due to medical, scientific and soci...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2012.666532
更新日期:2013-01-01 00:00:00
abstract::Use of finite element (FE) foot model as a clinical diagnostics tool is likely to improve the specificity of foot injury predictions in the diabetic population. Here we proposed a novel workflow for rapid construction of foot FE model incorporating realistic geometry of metatarsals encapsulated into lumped forefoot's ...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2017.1370458
更新日期:2017-10-01 00:00:00
abstract::Transcatheter aortic valve replacement (TAVR) strongly depends on the calcification patterns, which may lead to a malapposition of the stented valve and complication onsets in terms of structure kinematics and paravalvular leakage (PVL). From one anatomical-resembling model of the aortic root, six configurations with ...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2020.1817409
更新日期:2020-09-14 00:00:00