Advances in Bioengineering最新文献_第2页

Computational Fluid Dynamics Model Analysis of the Blood Flow in the Right Coronary Artery on the Beating Heart 心脏右冠状动脉血流的计算流体动力学模型分析

Advances in Bioengineering Pub Date : 2001-11-11 DOI: 10.1115/imece2001/bed-23003

H. Hayashi, T. Ohashi, D. Mori, T. Yamaguchi

引用次数: 0

Effects of Wall Shear Stress on the Expression of Occludin in Human Umbilical Vein Endothelial Cells 壁面剪切应力对人脐静脉内皮细胞Occludin表达的影响

Advances in Bioengineering Pub Date : 2001-11-11 DOI: 10.1115/imece2001/bed-23010

D. M. Brey, Xu Yang, R. Keynton, Thomas J. Rousse, W. Ehringer, J. Alexander

引用次数: 0

Simulation of the Central Airways for Identifying Airway Partial Obstruction 识别气道部分阻塞的中央气道模拟

Advances in Bioengineering Pub Date : 2001-11-11 DOI: 10.1115/imece2001/bed-23105

A. Al-Jumaily, Y. Du

引用次数: 0

A Spring-Loaded Constant Force Exercise Device 一种弹簧加载恒力运动装置

Advances in Bioengineering Pub Date : 2001-11-11 DOI: 10.1115/imece2001/bed-23006

Matthew J. Chatham, B. A. Todd, J. Parker, Audrey S. House, Jenny L. Taylor

{"title":"A Spring-Loaded Constant Force Exercise Device","authors":"Matthew J. Chatham, B. A. Todd, J. Parker, Audrey S. House, Jenny L. Taylor","doi":"10.1115/imece2001/bed-23006","DOIUrl":"https://doi.org/10.1115/imece2001/bed-23006","url":null,"abstract":"\u0000 Bone mineral density loss has been observed in astronauts who have spent a significant amount of time in a micro-gravity environment [1]. The lack of mechanical stress placed on the bones while in this environment is a major factor in the decrease in bone mineral density. To counteract these effects, resistive exercise has been the focus of many studies. Weighted plates have been used to provide a constant force resistance in ground-based bed rest studies. Bed rest has been established as one of the best ways to simulate the long-term effects of micro-gravity on earth [2]. In weightlessness, however, an alternate source of resistive force is required Some exercise devices provide resistance with elastic bands. Unfortunately, these elastic bands tend to lose their mechanical stiffness with use, requiring many spare elastic bands to be available for long duration missions in space. A more robust system that requires less maintenance would be preferable. Metallic helical springs meet this requirement The mechanical properties of helical springs are predictable, and these springs have a long life, making them well suited for long duration missions. However, helical springs exhibit linear behavior. That is, the resistive force provided by the spring is directly proportional to the amount of deflection. Therefore, a mechanism was designed to interact with the linear springs to provide a constant output force over a given length of travel.","PeriodicalId":7238,"journal":{"name":"Advances in Bioengineering","volume":"109 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2001-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80764890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Total Knee Replacement Model for Evaluation of Joint Mechanics 全膝关节置换术关节力学评估模型

Advances in Bioengineering Pub Date : 2001-11-11 DOI: 10.1115/imece2001/bed-23087

Jason P. Halloran, P. Rullkoetter

引用次数: 0

Hybrid Adaptive Kalman Filter: Calibrating a Hemodynamic Model for Continuous Arterial Pressure Monitoring

Advances in Bioengineering Pub Date : 2001-11-11 DOI: 10.1115/imece2001/bed-23015

Yi Zhang, H. Asada

引用次数: 0

Development of a Rate-Dependent Material Model for UHMWPE Joint Replacement Components 超高分子量聚乙烯关节置换部件速率相关材料模型的建立

Advances in Bioengineering Pub Date : 2001-11-11 DOI: 10.1115/imece2001/bed-23050

W. Houchaime, A. Petrella, T. Dietz, J. Halloran, P. Rullkoetter

引用次数: 0

A Method for the Rapid Prototyping of Custom Contoured Cushions 一种定制轮廓垫的快速成型方法

Advances in Bioengineering Pub Date : 2001-11-11 DOI: 10.1115/imece2001/bed-23097

M. Parkinson, Jane Huggins

{"title":"A Method for the Rapid Prototyping of Custom Contoured Cushions","authors":"M. Parkinson, Jane Huggins","doi":"10.1115/imece2001/bed-23097","DOIUrl":"https://doi.org/10.1115/imece2001/bed-23097","url":null,"abstract":"\u0000 Decubitous ulcers (“pressure sores”) are a significant concern for people using wheelchairs. In fact, results published by the University of Kansas [1] indicate that over half of those using wheelchairs will develop a pressure sore at some point. This susceptibility is due to the conditions under which these ulcers develop: shear stress and pressure work together to cut off the blood supply to the surface tissue, which subsequently dies. Heat and moisture can increase the likelihood of this necrosis and the rate at which it occurs. Although sores can develop quickly (onset can occur in as few as fifteen minutes), they may take months to heal.\u0000 Appropriate seat cushion selection helps to mitigate the causative factors [2]. In particular, custom-contoured cushions (CCC) can offer dramatic improvements. Research has shown that CCC’s offer the best distribution of pressure and reduction of shear stress, reducing these factors by as much as 80% [3]. CCC’s are not commonly used, however, because the cost and time involved in design, manufacture, and delivery are prohibitive.\u0000 The obstacles of cost, time, and inconvenience, can be overcome by applying mass-customization and rapid-prototyping principles to the process used to create CCC’s. This involves automating the basic steps of the process: creating an electronic representation of the seating surface and machining that surface using a computer-controlled (CNC) mill. Similar systems have been put in place to automate a variety of processes, from the creation of custom orthotics for footwear to the design and creation of impeller wheels [4]. Such a system would be capable of producing a suitable custom-contoured cushion in minutes or hours rather than weeks or months.","PeriodicalId":7238,"journal":{"name":"Advances in Bioengineering","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2001-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78024896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Indentation of Articular Cartilage: Effects of Specimen Radius on Determined Properties 关节软骨的压痕:试样半径对确定性能的影响

Advances in Bioengineering Pub Date : 2001-11-11 DOI: 10.1115/imece2001/bed-23058

C. Spoon, J. Wayne

引用次数: 0

Active Learning in Mechanics Courses in Biomedical Engineering 生物医学工程力学课程的主动学习

Advances in Bioengineering Pub Date : 2001-11-11 DOI: 10.1115/imece2001/bed-23019

G. Livesay, K. Dee, E. Nauman, R. T. Hart

引用次数: 0