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Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference最新文献

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A measurement technique to monitor pelvic tilt 一种监测骨盆倾斜的测量技术
Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference Pub Date : 1991-04-04 DOI: 10.1109/NEBC.1991.154626
K. Coleman, S. Reinecke, T. Bendix
{"title":"A measurement technique to monitor pelvic tilt","authors":"K. Coleman, S. Reinecke, T. Bendix","doi":"10.1109/NEBC.1991.154626","DOIUrl":"https://doi.org/10.1109/NEBC.1991.154626","url":null,"abstract":"In order to verify that the tilt gage tracks the motion of the pelvis, a study was performed to compare pelvic motion, in this case rotation, measured by the pelvic motion device (PMD) with the motion measured by the tilt gage alone. Seven subjects (five men, two women) were tested. A regression model was used to assess the degree of accuracy in predicting the actual PMD angle from the voltage on the tilt gage. It is shown that a change of 1 V in the tilt gage resulted in decreases of 7.67 degrees on the PMD. The regression model explained 96.8% of the variability in PMD angle. The tilt sensor provides an accurate measure of the angle of tilt of the pelvis. The technique provides continuous monitoring of pelvic tilt in a sitting position.<<ETX>>","PeriodicalId":434209,"journal":{"name":"Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132681374","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: 3
Pulmonary input impedance spectra in models of chronically altered pulmonary hemodynamics 慢性改变肺血流动力学模型的肺输入阻抗谱
Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference Pub Date : 1991-04-04 DOI: 10.1109/NEBC.1991.154639
C. Lucas, B. Ha, G. Henry, E. Frantz, J. Ferreiro, B. Wilcox
{"title":"Pulmonary input impedance spectra in models of chronically altered pulmonary hemodynamics","authors":"C. Lucas, B. Ha, G. Henry, E. Frantz, J. Ferreiro, B. Wilcox","doi":"10.1109/NEBC.1991.154639","DOIUrl":"https://doi.org/10.1109/NEBC.1991.154639","url":null,"abstract":"Pulmonary input impedance spectra were estimated in one-month-old lambs whose circulation had been altered during the first few days of life to mimic the pulmonary. hemodynamic states observed in infants and children with left-to-right shunts (high flow) and /or pulmonary vascular obstructive disease (high pressure). Spectral results obtained from the animal models were compared with those obtained from a computer simulation based on morphometric and hemorheologic data compiled for the 4 kg cat. Spectral features examined included the frequency of the first modulus minimum (indicative of the pulse wave reflection and/or pulse wave velocity) and characteristic impedance (average resistance to pulsatile flow). High flow (shunt-open/shunt-closed ratio>2.1) resulted in a slight spectral shift to the right with little change in characteristic impedance in both the lamb and the passive computer simulation models. High pressure (mean pulmonary artery pressure >28 mmHg) in the lamb model resulted in a marked shift to the right with a doubling of characteristic impedance.<<ETX>>","PeriodicalId":434209,"journal":{"name":"Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134485644","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 pressure based adaptive controller for closed circuit anesthesia 一种基于压力的闭路麻醉自适应控制器
Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference Pub Date : 1991-04-04 DOI: 10.1109/NEBC.1991.154584
A. Sharma, R.L. Giffith, R. Roy
{"title":"A pressure based adaptive controller for closed circuit anesthesia","authors":"A. Sharma, R.L. Giffith, R. Roy","doi":"10.1109/NEBC.1991.154584","DOIUrl":"https://doi.org/10.1109/NEBC.1991.154584","url":null,"abstract":"To make the closed-circuit system more general, a pressure-based adaptive controller for closed-circuit anesthesia (CCA) has been developed. The pressure-volume characteristics of the bladder or the bellows is used as the basis for the pressure based control of a CCA system. The controller was tested during six animal experiments on dogs and was stable in both the spontaneous and mechanical models of ventilation. The system developed is more acceptable to the practicing anesthetist accustomed to the direct feel of the anesthetic bladder acting upon the patient, both in case of assisted and manual control of ventilation. The development of this anesthesia delivery system eliminates the problem of solving complex multi-compartment mathematical equations in order to predict the flow of oxygen, anesthetic agent, and nitrous oxide necessary for maintaining the desired level of alveolar oxygen concentration, end-tidal anesthetic concentration, and the pressure inside the bladder or the bellows.<<ETX>>","PeriodicalId":434209,"journal":{"name":"Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124922262","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 computer based system for quantification of the evoked response and long-term potentiation 一种基于计算机的对诱发反应和长时增强进行量化的系统
Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference Pub Date : 1991-04-04 DOI: 10.1109/NEBC.1991.154654
R. Macgregor, R. Austin-Lafrance, J. Bronzino
{"title":"A computer based system for quantification of the evoked response and long-term potentiation","authors":"R. Macgregor, R. Austin-Lafrance, J. Bronzino","doi":"10.1109/NEBC.1991.154654","DOIUrl":"https://doi.org/10.1109/NEBC.1991.154654","url":null,"abstract":"The hippocampal long-term potentiation (LTP) phenomenon can be quantified by employing evoked response techniques and obtaining specific measurements taken from the evoked response waveform. The authors describe the data acquisition, computer analysis, and statistical treatment of the evoked response waveforms obtained from the dentate gyrus upon stimulation of the perforant path before and after the potentiation process in two diet groups. Control animals (25%-25% protein diet) and prenatally malnourished animals (6%-25% protein diet) were employed. Comparisons between the control and prenatally malnourished animals indicate that the efficacy of synaptic transmission was significantly decreased in those animals exposed to the prenatal protein insult.<<ETX>>","PeriodicalId":434209,"journal":{"name":"Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference","volume":"231 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114430218","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
Adaptive behavior in the respiratory chemoreflex response 呼吸化学反射反应中的适应性行为
Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference Pub Date : 1991-04-04 DOI: 10.1109/NEBC.1991.154583
D. Sidney, C. Poon
{"title":"Adaptive behavior in the respiratory chemoreflex response","authors":"D. Sidney, C. Poon","doi":"10.1109/NEBC.1991.154583","DOIUrl":"https://doi.org/10.1109/NEBC.1991.154583","url":null,"abstract":"The chemoreflex response is adaptively modified to optimize respiration relative to specific chemical and mechanical constraints. It is shown that there is a difference in the responses under inspiratory resistive loading between CO/sub 2/ and dead-space breathing. The difference in response suggests the existence of an adaptive behavior of the controller. Chemoreflex controls respiration, but it is not above being modified, or adapting, to different situations to produce more effective breathing.<<ETX>>","PeriodicalId":434209,"journal":{"name":"Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121893111","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
Application of a neural network in recognizing facial expression 神经网络在面部表情识别中的应用
Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference Pub Date : 1991-04-04 DOI: 10.1109/NEBC.1991.154648
B.A. Donohue, J. Bronzino, J. Diliberti, D. P. Olson, L.R. Schweitzer, P. Walsh
{"title":"Application of a neural network in recognizing facial expression","authors":"B.A. Donohue, J. Bronzino, J. Diliberti, D. P. Olson, L.R. Schweitzer, P. Walsh","doi":"10.1109/NEBC.1991.154648","DOIUrl":"https://doi.org/10.1109/NEBC.1991.154648","url":null,"abstract":"Input to the neural network program consists of facial images from a video source. The program uses the back propagation algorithm to train the network and to classify input data based on the subject's posed facial expression. Training and testing were performed with multiple individuals. The network was trained on a set consisting of 34 happy and 34 sad images from five different subjects. Additionally, the network was tested with images of subjects which were not included in training. In this case, training was performed using 24 happy and 24 sad images of three subjects. Testing was performed using ten happy and ten sad images of two new subjects. In preliminary testing, the network responded correctly for 85% of the 20 test cases. The ability of the network to generalize this discrimination successfully to new individuals is also demonstrated.<<ETX>>","PeriodicalId":434209,"journal":{"name":"Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123862650","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
Learning binaural sound localization through a neural network 通过神经网络学习双耳声音定位
Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference Pub Date : 1991-04-04 DOI: 10.1109/NEBC.1991.154557
F. Palmieri, M. Datum, A. Shah, A. Moiseff
{"title":"Learning binaural sound localization through a neural network","authors":"F. Palmieri, M. Datum, A. Shah, A. Moiseff","doi":"10.1109/NEBC.1991.154557","DOIUrl":"https://doi.org/10.1109/NEBC.1991.154557","url":null,"abstract":"A neural network system is implemented that uses binaural time/intensity cues for determining azimuth/elevation of a sound source. The system is designed to approximately mimic the sound localization behavior of the owl. The network is trained in a supervised learning mode. The errors between the estimated position (from the neural net) and the actual position (from an ideal optical sensor) are used to determine adaptively the synaptic connections. The learning paradigm used is the multiple extended Kalman algorithm, which allows training with no parameter adjustments.<<ETX>>","PeriodicalId":434209,"journal":{"name":"Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117247931","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: 10
Development of a method to measure knee joint sounds 一种测量膝关节声音的方法
Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference Pub Date : 1991-04-04 DOI: 10.1109/NEBC.1991.154619
K. A. Burnham, M.A. Westwell, M.S. Perry, A. Hoffman, R. Long
{"title":"Development of a method to measure knee joint sounds","authors":"K. A. Burnham, M.A. Westwell, M.S. Perry, A. Hoffman, R. Long","doi":"10.1109/NEBC.1991.154619","DOIUrl":"https://doi.org/10.1109/NEBC.1991.154619","url":null,"abstract":"A noninvasive experiment is designed to detect and record knee sounds and isolate them from background noise. The experimental system includes the use of microphones, a differential amplifier, and a signal analyzer. Sound emitted from a normal contralateral knee is used as a control signal. Results show that the frequency spectrum from an injured knee is significantly different from the normal contralateral knee.<<ETX>>","PeriodicalId":434209,"journal":{"name":"Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126566082","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
Neural network classification of EEG using chaotic preprocessing and phase space reconstruction 基于混沌预处理和相空间重构的脑电神经网络分类
Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference Pub Date : 1991-04-04 DOI: 10.1109/NEBC.1991.154576
D. M. Tumey, P.E. Morton, D. Ingle, C. W. Downey, J. Schnurer
{"title":"Neural network classification of EEG using chaotic preprocessing and phase space reconstruction","authors":"D. M. Tumey, P.E. Morton, D. Ingle, C. W. Downey, J. Schnurer","doi":"10.1109/NEBC.1991.154576","DOIUrl":"https://doi.org/10.1109/NEBC.1991.154576","url":null,"abstract":"A cognitive mode mapping system is developed that analyzes and classifies electroencephalograph (EEG) signals recorded from four sites of a subject's brain. The subjects produce this EEG data while performing five selected cognitive tasks. The objective of the system is to identify these tasks based on the salient features embedded in the raw EEG signals. Also, due to the demanding requirements of some environments (such as jet fighter cockpits), achieving the state recognition in near real-time is critical. Initial experiments show the system is able to correctly classify the EEG signals from the subjects 100% of the time. The classification delay is approximately 15 seconds due to the initial 10 seconds of data gathering and 5 seconds of network feedforward processing delay. It is also found that the trained network can recognize the subjects' EEG days after the initial training took place.<<ETX>>","PeriodicalId":434209,"journal":{"name":"Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121810402","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: 11
Oscillatory flow distribution at a bifurcation 分岔处的振荡流分布
Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference Pub Date : 1991-04-04 DOI: 10.1109/NEBC.1991.154591
W. Keyer, B. Savilonis
{"title":"Oscillatory flow distribution at a bifurcation","authors":"W. Keyer, B. Savilonis","doi":"10.1109/NEBC.1991.154591","DOIUrl":"https://doi.org/10.1109/NEBC.1991.154591","url":null,"abstract":"Flow-distribution in a 90 degrees bifurcated airway during high-frequency oscillation is analyzed by numerical simulation. The parent and two daughter branches are of equal length and diameter, describing a T-junction rotated by 90 degrees . The flow is considered laminar and incompressible, which is reasonable for small tidal volumes. The solution has been limited to two-dimensional channels, merely by the constraint of computational time. The equations are solved using a finite-difference formulation. Depending on the Reynolds and Strouhal numbers, it was possible to direct larger fractions of the tidal volume to either of the daughter ducts.<<ETX>>","PeriodicalId":434209,"journal":{"name":"Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124236653","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
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