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Safaeepour Zahra Z 1Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University (IAU), Tehran, - - 2014
Background and aim:In the present study, a new approach was applied to design and develop a viscoelastic ankle-foot prosthesis. The aim was to replicate the intact ankle moment-angle loop in the normal walking speed.Technique:The moment-angle loop of intact ankle was divided into four parts, and the appropriate models including two ...
Wentink Eva C EC MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, The - - 2014
Background and aim:Several studies have shown that feedback in upper-leg prostheses is possible, but slow or difficult to interpret. In this study, electrotactile and auditive error-based feedback, only giving feedback when an undesired event occurs, were tested for its use in upper-leg prosthesis when provided during a perturbation.Technique:A total of ...
Kistenberg Robert S - - 2014
New technology and materials have advanced prosthetic designs to enable people who rely on artificial limbs to achieve feats never dreamed before. However, the latest and the greatest technology is not appropriate for everyone. The aim of this article is to present contemporary options that are available for people who ...
Han Don-Hee DH a Inje University , Dept. of Occupational Health and Safety Engineering , Obang-dong 607 , Gimhae , 621-749 , - - 2014
ABSTRACT Ten years ago, three differently sized half-mask facepiece prototypes were constructed from silicon using computer graphics and statistical analysis to fit them according to Korean facial dimensions. The purpose of this study was to complete the medium-size half-mask respirator based on the prototype, which would provide an adequate fit ...
O'Brien Sean T ST University of Manitoba, Winnipeg, MB, Canada; Concordia Joint Replacement Group, Winnipeg, MB, - - 2014
The cost and time efficiency of computational polyethylene wear simulations may enable the optimization of total knee replacements for the reduction of polyethylene wear. The present study proposes an energy dissipation wear model for polyethylene which considers the time dependent molecular behavior of polyethylene, aspects of tractive rolling and contact ...
Zhang Le L School of Information Engineering, Shenyang University, Shenyang 110044, China ; School of Information Science and Technology, Tsinghua University, Beijing 100084, - - 2014
This paper investigates the permutation flowshop scheduling problem (PFSP) with the objectives of minimizing the makespan and the total flowtime and proposes a hybrid metaheuristic based on the particle swarm optimization (PSO). To enhance the exploration ability of the hybrid metaheuristic, a simulated annealing hybrid with a stochastic variable neighborhood ...
Goyal Mukesh Kumar MK Department of Prosthodontics and Maxillofacial Prosthetics, Maharaja Gangasingh Dental College and Research Center, Sri Ganganagar, Rajasthan, - - 2014
Maxillofacial prostheses are usually fabricated on the basis of conventional impressions and techniques. The extent to which the prosthesis reproduces normal facial morphology depends on the clinical judgment and skill of the individual fabricating the prosthesis. Recently, as a result of advances in technology, various computer-aided design and manufacturing techniques ...
Abdelgaied Abdellatif - - 2013
The mean average life is increasing; therefore, there is a need to increase the lifetime of the prostheses. To fulfil this requirement, new prosthetic designs and materials are being introduced. Two of the design parameters that may affect wear of total knee replacements, and hence the expected lifetime, are the ...
Xie Hui - - 2013
A novel solution for electro-hydraulic variable valve timing (VVT) system of gasoline engines is proposed, based on the concept of active disturbance rejection control (ADRC). Disturbances, such as oil pressure and engine speed variations, are all estimated and mitigated in real-time. A feed-forward controller was added to enhance the performance ...
Lee Chung-Hao - - 2013
Estimation of regional tissue stresses in the functioning heart valve remains an important goal in our understanding of normal valve function and in developing novel engineered tissue strategies for valvular repair and replacement. Methods to accurately estimate regional tissue stresses are thus needed for this purpose, and in particular to ...
Dimaio Frank - - 2013
Recent work has shown the effectiveness of structure-prediction methods in solving difficult molecular-replacement problems. The Rosetta protein structure modeling suite can aid in the solution of difficult molecular-replacement problems using templates from 15 to 25% sequence identity; Rosetta refinement guided by noisy density has consistently led to solved structures where ...
Austin Peter C - - 2013
Propensity-score matching is increasingly being used to reduce the confounding that can occur in observational studies examining the effects of treatments or interventions on outcomes. We used Monte Carlo simulations to examine the following algorithms for forming matched pairs of treated and untreated subjects: optimal matching, greedy nearest neighbor matching ...
Martin Caitlin - - 2013
One of the major failure modes of bioprosthetic heart valves (BHVs) is noncalcific structural deterioration due to fatigue of the tissue leaflets; yet, the mechanisms of fatigue are not well understood. BHV durability is primarily assessed based on visual inspection of the leaflets following accelerated wear testing. In this study, ...
Araci Ismail Emre IE Department of Bioengineering, Stanford University, Stanford and Howard Hughes Medical Institute, CA 94305, USA. Electronic address: - - 2014
In 2002, Thorsen et al. integrated thousands of micromechanical valves on a single microfluidic chip and demonstrated that the control of the fluidic networks can be simplified through multiplexors [1]. This enabled realization of highly parallel and automated fluidic processes with substantial sample economy advantage. Moreover, the fabrication of these ...
Patterson David J - - 2013
Expanded use of artificial insemination (AI) and/or adoption of emerging reproductive technologies for beef heifers and cows require precise methods of estrous-cycle control. New protocols for inducing and synchronizing a fertile estrus in replacement beef heifers and postpartum beef cows in which progestins are used provide new opportunities for beef ...
Wadhwa Meenu - - 2013
Two candidate preparations of human sequence recombinant Interleukin-2 (IL-2) were formulated and lyophilized at NIBSC prior to evaluation in a collaborative study for their suitability to serve as a replacement international standard. The preparations were tested by eight laboratories using in vitro bioassays and immunoassays. The candidate preparation 86/500 was ...
Belter Joseph T - - 2013
In this article, we set forth a detailed analysis of the mechanical characteristics of anthropomorphic prosthetic hands. We report on an empirical study concerning the performance of several commercially available myoelectric prosthetic hands, including the Vincent, iLimb, iLimb Pulse, Bebionic, Bebionic v2, and Michelangelo hands. We investigated the finger design ...
de Steiger Richard N RN School of Population Health and Clinical Practice, University of Adelaide, Adelaide, Australia. - - 2013
Joint Replacement Registries play a significant role in monitoring arthroplasty outcomes by publishing data on survivorship of individual prostheses or combinations of prostheses. The difference in outcomes can be device- or non-device-related, and these factors can be analyzed separately. Although registry data indicate that most prostheses have similar outcomes, some ...
Kouhi Esfandyar - - 2013
This study presents a novel methodology for constructing an accurate geometrical model of a stentless aortic heart valve replacement (AVR). The main objective is to propose an optimized AVR model that can be used as an ideal scaffold for tissue engineering applications or a biocompatible prosthesis. Current techniques available for ...
Marom Gil - - 2013
Background: Native aortic valve cusps are composed of collagen fibers embedded in their layers. Each valve cusp has its own distinctive fiber alignment with varying orientations and sizes of its fiber bundles. However, prior mechanical behavior models have not been able to account for the valve-specific collagen fiber networks (CFN) ...
Zhao Jie - - 2013
This paper presents the development of a variable-damping controller for a prosthetic knee using a simulated biped in a virtual environment before real tests are conducted on humans. The simulated biped incorporates several features of human walking, such as functional morphology, exploitation of inherent dynamics, hierarchical control network, combination of ...
Belter Joseph T - - 2013
There will always be a drive to reduce the complexity, weight, and cost of mobile platforms while increasing their inherent capabilities. This paper presents a novel method of increasing the range of achievable grasp configurations of a mechatronic hand controlled by a single actuator. By utilizing the entire actuator space, ...
Woiczinski Matthias - - 2013
Abstract With the aging but still active population, research on total joint replacements relies increasingly on numerical methods, such as finite element analysis, to improve wear resistance of components. However, the validity of finite element models largely depends on the accuracy of their material behavior and geometrical representation. In particular, ...
Smit Gerwin - - 2013
Background:Cosmetic gloves that cover a prosthetic hand have a parasitic positive stiffness that counteracts the flexion of a finger joint.Objectives:Reducing the required input torque to move a finger of a prosthetic hand by compensating the parasitic stiffness of the cosmetic glove.Study design:Experimental, test bench.Methods:The parasitic positive stiffness and the required ...
Carrozzini Benedetta - - 2013
VLD (vive la difference) is a novel ab initio phasing approach that is able to drive random phases to the correct values. It has been applied to small, medium and protein structures provided that the data resolution was atomic. It has never been used for non-ab initio cases in which ...
Gondim Ai - - 2013
The genus Diadema presently consists of seven species, two of which are known from the Brazilian coast: D. antillarum and D. ascensionis. The first is usually known for shallow coastal areas, while the second was apparently restricted to oceanic islands. In February 2011, a dense population of D. ascensionis was ...
Hirata Masanobu - - 2013
To examine the accuracy of intraoperative estimation of stem anteversion in total hip arthroplasty (THA), we compared the intraoperatively estimated stem anteversion (estimated prosthetic anteversion) to stem anteversion measured by postoperative computed tomography (true anteversion) in 73 hips in 73 patients. Estimated prosthetic anteversion was significantly greater than true anteversion ...
Li Xiao - - 2013
Multi-step analytical tests, such as an enzyme-linked immunosorbent assay (ELISA), require delivery of multiple fluids into a reaction zone and counting the incubation time at different steps. This paper presents a new type of paper-based magnetic valves that can count the time and turn on or off a fluidic flow ...
Colombo Giorgio G Department of Mechanics , Polytechnic of Milan , Milan , - - 2013
This article concerns the design of lower limb prosthesis, both below and above knee. It describes a new computer-based design framework and a digital model of the patient around which the prosthesis is designed and tested in a completely virtual environment. The virtual model of the patient is the backbone ...
Burlina Philippe - - 2013
This article presents an approach to modeling the closure of the mitral valve using patient-specific anatomical information derived from 3D transesophageal echocardiography (TEE). Our approach uses physics-based modeling to solve for the stationary configuration of the closed valve structure from the patient-specific open valve structure, which is recovered using a ...
Zervides C - - 2013
Relatively little attention has been paid to the venous system and valves from a cardiovascular engineering perspective till date. Given the involvement of venous valve haemodynamics in the development of deep vein thrombosis this is an area that needs more detailed investigation and close collaboration between clinicians and cardiovascular engineers. ...
Jin Ruyun - - 2013
BACKGROUND: New York (NY) valve and valve/coronary artery bypass grafting (CABG) mortality risk models, developed from operations performed in 2007 to 2009, have just been published. These models were validated using NY data from 2004 to 2006. The authors stated that their models "should also be validated by testing them ...
Röhrnbauer B - - 2013
A simple model system using synthetic materials was developed to simulate the in vivo mechanical behavior of prosthetic meshes. Two types of prosthetic meshes, SPMM (heavy-weight) and Gynemesh M (light-weight, partly absorbable) were embedded in dry conditions in an elastomeric matrix. These composites were characterized using two different testing configurations, ...
Jabłoński Ireneusz - - 2013
The paper answers the questions if it is possible to conclude in objective way on more (than one -Rint - in a classical IT) number of parameters from the time domain post-interrupter signals during the occlusional measurement of respiratory mechanics and also verifies what accuracy can be achieved in such ...
Saegusa Takumi T Department of Biostatistics, University of Washington, Seattle, Washington 98195-7232, USA, - - 2013
We develop asymptotic theory for weighted likelihood estimators (WLE) under two-phase stratified sampling without replacement. We also consider several variants of WLEs involving estimated weights and calibration. A set of empirical process tools are developed including a Glivenko-Cantelli theorem, a theorem for rates of convergence of M-estimators, and a Donsker ...
Zhao Ruogang - - 2013
Micropipette aspiration (MA) has been widely used to measure the biomechanical properties of cells and biomaterials. To estimate material parameters from MA experimental data, analytical half-space models and inverse finite element (FE) analyses are typically used. The half-space model is easy to implement but cannot account for nonlinear material properties ...
Fan Rong R Department of Biomedical Engineering and the Institute for Computational Engineering and Sciences, The University of Texas at Austin, Austin, TX, United - - 2013
Surgical replacement of the pulmonary valve (PV) is a common treatment option for congenital pulmonary valve defects. Engineered tissue approaches to develop novel PV replacements are intrinsically complex, and will require methodical approaches for their development. Single leaflet replacement utilizing an ovine model is an attractive approach in that candidate ...
Xavier Rui - - 2013
The delivery approach, though very appropriate for remodeling the tip of the nose, has been overlooked in recent years and has often been passed over for the open approach. One reason for this is the intercartilaginous incision used for the delivery approach, which may cause scarring at the nasal valve ...
Shi Hongliang - - 2013
Ten genera of Physoderina from the Oriental Region are diagnosed and described, and twenty six species representing eight genera (Paraphaea Bates, Anchista Nietner, Metallanchista gen. n., Diamella nom. n., Allocota Motschulsky, Orionella Jedlička, Endynomena Chaudoir and Dasiosoma Britton (Oriental species only)) are revised. Keys to genera and species are provided, ...
Stryła Wanda - - 2013
Amputations, or the removal of limbs at different levels, have been performed since the ancient times. The first reports of amputations originate from the ancient ruins in Egypt, where primitive prosthetic toes were found in the tombs of the Pharaohs. In Europe, during the period of ancient Greece and Rome, ...
Pawlikowski Marek - - 2013
Artificial materials including various kinds of polymers like polyurethanes are more and more widely used in different branches of science and also in biomedical engineering. The paper presents the process of creating a constitutive equation for a polyurethane nanocomposite which is considered to be hyper-elastic. The constitutive modelling was conducted ...
Cloutier Aimee A Human-Centric Design Research Laboratory, Department of Mechanical Engineering, Texas Tech University, Lubbock, - - 2013
In recent years, there has been a steep rise in the quality of prostheses for patients with upper limb amputations. Researchers have begun to identify methods of making prosthetic hands both functional and cosmetically appealing, in contrast to past designs. Many improvements have occurred because of novel design strategies, such ...
Doweld Alexander B AB National Institute of Carpology (Gaertnerian Institution), 21 Konenkowa Street, RUS-127560, Moscow, Russian Federation; Email: - - 2013
A new name for the extinct planthopper genus-Tetrafulgoria nom. nov. is proposed to replace preoccupied name Tetragonidium Pascher, 1914 (Protista).
Yassin Hurria - - 2012
A deterministic model is developed to support the tactical and operational replacement decisions at broiler breeder farms. The marginal net revenue approach is applied to determine the optimal replacement age of a flock. The objective function of the model maximizes the annual gross margin over the flock's production cycle. To ...
Votta Emiliano E Bioengineering Department, Politecnico di Milano, Milano, - - 2013
Recent computational methods enabling patient-specific simulations of native and prosthetic heart valves are reviewed. Emphasis is placed on two critical components of such methods: (1) anatomically realistic finite element models for simulating the structural dynamics of heart valves; and (2) fluid structure interaction methods for simulating the performance of heart ...
Sensinger J - - 2012
Individuals who ambulate with transfemoral prostheses fall more frequently than users of transtibial prostheses or able-bodied persons. One factor contributing to these falls may be reduced toe clearance during swing phase of the prosthesis. Quantitative gait data were acquired from ten persons with transfemoral amputations who were fitted with either ...
Fey Nicholas P - - 2012
Unilateral below-knee amputees develop abnormal gait characteristics that include bilateral asymmetries and an elevated metabolic cost relative to non-amputees. In addition, long-term prosthesis use has been linked to an increased prevalence of joint pain and osteoarthritis in the intact leg knee. To improve amputee mobility, prosthetic feet that utilize elastic ...
Bibbo Christopher - - 2013
Although there exist general guidelines regarding which patients are "suitable" candidates for total ankle replacement, these guidelines tend to be very conservative, much like those of knee and hip replacement from decades ago. There are also no direct comparison studies of one total ankle replacement design with another. Because of ...
Du Lin - - 2012
In this study, we aimed to improve the performance of a locomotion-mode-recognition system based on neuromuscular-mechanical fusion by introducing additional information about the walking environment. Linear-discriminant-analysis-based classifiers were first designed to identify a lower limb prosthesis user's locomotion mode based on electromyographic signals recorded from residual leg muscles and ground ...
Mills Frederick B - - 2012
The phenomenology of human embodiment can advance the practitioner's understanding of the lived human body and in particular, what it means to incorporate a prosthetic device into one's body. In order for a prosthesis to be incorporated into the lived body of the patient, the prosthesis must arguably be integrated ...
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