Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference最新文献_第8页

Evaluation of in vitro drug release and in vivo tolerance of porous biodegradable reservoir device 多孔可生物降解储药器体外释药及体内耐受性评价

Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference Pub Date : 1995-04-07 DOI: 10.1109/SBEC.1995.514418

D. Yang, G. Peyman, K. Fillacier, B. Khoobehi

引用次数: 1

Water and filler content of hybrid glass ionomers 杂化玻璃离子的水和填料含量

Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference Pub Date : 1995-04-07 DOI: 10.1109/SBEC.1995.514444

B. Roberts, A. Puckett, B. Bennett

引用次数: 0

Wavelet transformation of chaotic biological signals 混沌生物信号的小波变换

Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference Pub Date : 1995-04-07 DOI: 10.1109/SBEC.1995.514474

Bai-lian Li, Hsin-i Wu

{"title":"Wavelet transformation of chaotic biological signals","authors":"Bai-lian Li, Hsin-i Wu","doi":"10.1109/SBEC.1995.514474","DOIUrl":"https://doi.org/10.1109/SBEC.1995.514474","url":null,"abstract":"Wavelet analysis is a recently developed mathematical theory and computational method for decomposing a nonstationary signal into components that have good localization properties both in time and frequency and hierarchical structures. Wavelet transform provides local information and multiresolution decomposition on a signal that cannot be obtained using traditional methods such as Fourier transforms and statistical estimation theory. Hence the change in complex biological signals can be detected. We use wavelet analysis as an innovative method for identifying and characterizing chaotic biological signals in this paper. We usually do not know the underlying mechanism that determine the behavior of a biosystem. We are instead presented with nothing more than a phenomenological time series signal of the behavior, and must infer the mechanism from simple measurements of that time series. Data we used are simulated chaotic signals from the logistic equation. Using wavelet transformation we extract instantaneous frequencies of the signal varying in time across scales. The results under different parameters and initial conditions show that the phase maps of their wavelet transforms are different between period doubling bifurcation and chaos. This information could be used as a diagnostic for detecting different nonlinear dynamic responses. This may lead to a better understanding of the system, that may allow us to predict the onset of lethal arrhythmias and to intervene prior to the development of catastrophic clinical events.","PeriodicalId":332563,"journal":{"name":"Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124938736","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: 7

A model-based reasoning system for the management of respiratory weaning process 基于模型的呼吸脱机过程管理推理系统

Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference Pub Date : 1995-04-07 DOI: 10.1109/SBEC.1995.514417

Qian Tan, S. Napper

{"title":"A model-based reasoning system for the management of respiratory weaning process","authors":"Qian Tan, S. Napper","doi":"10.1109/SBEC.1995.514417","DOIUrl":"https://doi.org/10.1109/SBEC.1995.514417","url":null,"abstract":"Summary form only given. The progressive withdrawal of mechanical ventilation is called weaning. A computerized decision support system (off-line or on-line) would help the medical staff to wean patients more efficiently and can potentially reduce treatment duration and mortality rates. The aim of this research is to design a model-based reasoning system to provide on-line guidance in respiratory weaning process management. In this approach, the semi-quantitative reasoning method is applied to regulate and control the weaning process by adjusting the ventilator settings. A semi-quantitative method provides a level of description that is intermediate between abstract qualitative models and precise numerical models. It combines both qualitative and quantitative knowledge within a single semi-quantitative qualitative differential equation (SQDE) representation. It is a set of qualitative constraints which are augmented with envelopes for all monotonic functions and numeric ranges for all model variables and initial conditions. The model is then simulated to compute the variables in ventilator setting. The control system is tested under different physiological conditions, using a detailed simulation model of the human respiratory system.","PeriodicalId":332563,"journal":{"name":"Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123866973","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: 1

Pathologic processes associated with the use of scleral buckling in humans 与人类使用巩膜屈曲相关的病理过程

Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference Pub Date : 1995-04-07 DOI: 10.1109/SBEC.1995.514463

R. Misra

引用次数: 0

The acoustic sweep method for monitoring osteoporosis 超声扫描法监测骨质疏松症

Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference Pub Date : 1995-04-07 DOI: 10.1109/SBEC.1995.514491

S. Panteliou, H. Abbasi-Jahromi, A. Dimarogonas

引用次数: 0

Aging characteristics of four hybrid glass ionomers 四种杂化玻璃离子的老化特性

Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference Pub Date : 1995-04-07 DOI: 10.1109/SBEC.1995.514439

B. Bennett, A. Puckett, J. Fitchie

{"title":"Aging characteristics of four hybrid glass ionomers","authors":"B. Bennett, A. Puckett, J. Fitchie","doi":"10.1109/SBEC.1995.514439","DOIUrl":"https://doi.org/10.1109/SBEC.1995.514439","url":null,"abstract":"Summary form only given. The objective of this study was to evaluate the change in Barcol hardness of five different hybrid glass ionomers (GI) after storage in distilled H/sub 2/O at 37/spl deg/C. The materials were (A) Encapsulated and (B) Handmixed Variglass (Caulk Dentsply, Milford, DE), (C) Vitremer (3M, St. Paul, MN), (D) Fuji II (GC Corp., Tokyo, Japan) and (E) Photacfil (ESPE Premier, Norristown, PA). Barcol hardness measurements were taken on all the samples after twenty-four hours, 1 week and 1 month of aging. Comparison of the initial hardness using ANOVA (p<0.05) revealed no significant differences. However, materials A and B showed a decrease in hardness after 1 week of storage. In contrast, materials C, D and E showed a significant increase (p<0.05) in hardness after storage. Based upon these results, it may be concluded that materials C, D and E continue to react during aging resulting in a harder material. In contrast, the materials A and B do not continue to react but actually become softer due to plasticization by absorbed water. The additional reaction of materials C, D and E is most probably the result of further ionic crosslinking which may be facilitated by water absorption.","PeriodicalId":332563,"journal":{"name":"Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129400461","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

Cell adhesion strength to bioceramics and morphology 细胞对生物陶瓷的粘附强度及形态

Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference Pub Date : 1995-04-07 DOI: 10.1109/SBEC.1995.514501

T. Tateishi, T. Ushida

{"title":"Cell adhesion strength to bioceramics and morphology","authors":"T. Tateishi, T. Ushida","doi":"10.1109/SBEC.1995.514501","DOIUrl":"https://doi.org/10.1109/SBEC.1995.514501","url":null,"abstract":"The aim of this study is to measure adhesion strength of cultured cells to bioceramics such as alumina, and to adapt a mathematical model of defect growth kinetics to the cell adhesion phenomena. Fibroblasts from mouse (L-929) were cultured on alumina plates and fibronectin-coated alumina plates. The adhesion strength was measured by loading adhered cells with centrifugal force vertical to the material's surface. At the same time, we measured adhered areas and morphology of cells on the 2 types of surfaces by using an image analyzing method. The results show that the cells adhered more tightly to fibronectin coated alumina than to alumina. (50% of the cells were peeled off from the fibronectin-coated alumina under the load of 500 G, while 50% of the cells were peeled off from the alumina under the load of 100 G.) The image processed data show that the average of adhered areas of cells to fibronectin coated alumina was 3 times as large as to alumina 6 hours after seeding. The results show influence of fibronectin-receptor bonds on the cell's adhesion strength and the cell's adhesion phenomena. Considering the influence of fibronectin-receptor bonds, a mathematical model of defect growth kinetics was adapted to the cells adhesion phenomena, where we assumed that the rate of condensation of vacancies or the rate of rupture of fibronectin-receptor bonds at the tip of the crack was proportional to the radius of the crack.","PeriodicalId":332563,"journal":{"name":"Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126280255","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: 1

Efficiency of muscular contractions in mouse is different from that in frog 小鼠肌肉收缩的效率与青蛙不同

Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference Pub Date : 1995-04-07 DOI: 10.1109/SBEC.1995.514475

C. Yin, R. Woledge

引用次数: 1

Model of the behavior of a Kirschner-Ehmer style external fixator clamp Kirschner-Ehmer型外固定钳的行为模型

Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference Pub Date : 1995-04-07 DOI: 10.1109/SBEC.1995.514486

G. Pijanowski, J. W. Phillips, M. Swindeman

引用次数: 0