Pub Date : 1997-05-21DOI: 10.1109/NEBC.1997.594961
R.K. Miles, W. Smith, S.W. Flood, J. Lacourse
The Audible Thermostat is an assistive device for persons with low vision, or blind, which will enable them to know the ambient temperature of the room in which the device is located, the present setting of the thermostat and to precisely change and set the thermostat as desired. The Audible Thermostat is a residential heat/air conditioner thermostat with setting adjustment and ambient room temperature indicator similar to a standard thermostat, but utilizing information storage technology in the form of a voice chip controlled by a microprocessor.
{"title":"An Audible Thermostat for the blind or visually challenged","authors":"R.K. Miles, W. Smith, S.W. Flood, J. Lacourse","doi":"10.1109/NEBC.1997.594961","DOIUrl":"https://doi.org/10.1109/NEBC.1997.594961","url":null,"abstract":"The Audible Thermostat is an assistive device for persons with low vision, or blind, which will enable them to know the ambient temperature of the room in which the device is located, the present setting of the thermostat and to precisely change and set the thermostat as desired. The Audible Thermostat is a residential heat/air conditioner thermostat with setting adjustment and ambient room temperature indicator similar to a standard thermostat, but utilizing information storage technology in the form of a voice chip controlled by a microprocessor.","PeriodicalId":393788,"journal":{"name":"Proceedings of the IEEE 23rd Northeast Bioengineering Conference","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116972994","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}
Pub Date : 1997-05-21DOI: 10.1109/NEBC.1997.594930
E.C. Morillo, Y. Mendelson
This paper describes a multiwavelength transmission spectrophotometry set up to study the feasibility of measuring hemoglobin derivatives in whole blood, utilizing transmission pulse oximetry. Comparison of measured relative absorbance spectra with standard extinction coefficients versus wavelength data shows that the system closely reproduces the standard spectra of blood.
{"title":"Multiwavelength transmission spectrophotometry in the pulsatile measurement of hemoglobin derivatives in whole blood","authors":"E.C. Morillo, Y. Mendelson","doi":"10.1109/NEBC.1997.594930","DOIUrl":"https://doi.org/10.1109/NEBC.1997.594930","url":null,"abstract":"This paper describes a multiwavelength transmission spectrophotometry set up to study the feasibility of measuring hemoglobin derivatives in whole blood, utilizing transmission pulse oximetry. Comparison of measured relative absorbance spectra with standard extinction coefficients versus wavelength data shows that the system closely reproduces the standard spectra of blood.","PeriodicalId":393788,"journal":{"name":"Proceedings of the IEEE 23rd Northeast Bioengineering Conference","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114152301","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}
Pub Date : 1997-05-21DOI: 10.1109/NEBC.1997.594929
G. P. Gumbrell, R. Peura, S. Kun, R. Dunn
The objective of our research is to develop a pH based, microvascular measuring system which will be used for accurate postoperative monitoring of transplanted tissue. Currently, most pH monitors that are used for this purpose are difficult for hospital personnel to operate and do not possess sufficient long-term stability, resulting in false readings of tissue pH. An electronic multi-channel pH measuring device which interfaces with a laptop computer was constructed. The system makes use of an algorithm to compensate for inherent pH measurement instabilities. This is accomplished using separate pH reference electrode channels from which multiple measurements are averaged. Preliminary tests show that this system accurately measures tissue pH and is sufficiently stable during the 96 hour postoperative monitoring period.
{"title":"Development of a minimally invasive microvascular ischemia monitor: clinical detection of ischemia","authors":"G. P. Gumbrell, R. Peura, S. Kun, R. Dunn","doi":"10.1109/NEBC.1997.594929","DOIUrl":"https://doi.org/10.1109/NEBC.1997.594929","url":null,"abstract":"The objective of our research is to develop a pH based, microvascular measuring system which will be used for accurate postoperative monitoring of transplanted tissue. Currently, most pH monitors that are used for this purpose are difficult for hospital personnel to operate and do not possess sufficient long-term stability, resulting in false readings of tissue pH. An electronic multi-channel pH measuring device which interfaces with a laptop computer was constructed. The system makes use of an algorithm to compensate for inherent pH measurement instabilities. This is accomplished using separate pH reference electrode channels from which multiple measurements are averaged. Preliminary tests show that this system accurately measures tissue pH and is sufficiently stable during the 96 hour postoperative monitoring period.","PeriodicalId":393788,"journal":{"name":"Proceedings of the IEEE 23rd Northeast Bioengineering Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117045642","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}
Pub Date : 1997-05-21DOI: 10.1109/NEBC.1997.594935
S. Wolpert
In this study, a comprehensive neuronal model of a living central pattern generator network was implemented in custom analog VLSI hardware. After the model was designed and assembled, signals denoting membrane potential in each cell were seen to compare faithfully and regularly with those in their living counterparts, but as key cell parameters were varied, the network was observed to settle into alternate signal patterns and rhythms. This suggests that defining the structure of a nerve network is not enough to specify the signals that will reside therein.
{"title":"Can neural circuit structure define its signal patterns?","authors":"S. Wolpert","doi":"10.1109/NEBC.1997.594935","DOIUrl":"https://doi.org/10.1109/NEBC.1997.594935","url":null,"abstract":"In this study, a comprehensive neuronal model of a living central pattern generator network was implemented in custom analog VLSI hardware. After the model was designed and assembled, signals denoting membrane potential in each cell were seen to compare faithfully and regularly with those in their living counterparts, but as key cell parameters were varied, the network was observed to settle into alternate signal patterns and rhythms. This suggests that defining the structure of a nerve network is not enough to specify the signals that will reside therein.","PeriodicalId":393788,"journal":{"name":"Proceedings of the IEEE 23rd Northeast Bioengineering Conference","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121171283","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}
Pub Date : 1997-05-21DOI: 10.1109/NEBC.1997.594952
J. Tranquillo, T. Ning
This paper reflects a study to explore the chaotic behavior of respiration signals. The correlation dimension is used to identify the presence of strange attractors and estimate dimensions. The Grassberger-Procaccia algorithm and the embedding method of Takens were used for computation of the chaotic measure. Preliminary results show the presence of an attractor at a dimension of approximately 2.0 when the data length exceeds 100 points.
{"title":"Chaotic behavior of respiration signals","authors":"J. Tranquillo, T. Ning","doi":"10.1109/NEBC.1997.594952","DOIUrl":"https://doi.org/10.1109/NEBC.1997.594952","url":null,"abstract":"This paper reflects a study to explore the chaotic behavior of respiration signals. The correlation dimension is used to identify the presence of strange attractors and estimate dimensions. The Grassberger-Procaccia algorithm and the embedding method of Takens were used for computation of the chaotic measure. Preliminary results show the presence of an attractor at a dimension of approximately 2.0 when the data length exceeds 100 points.","PeriodicalId":393788,"journal":{"name":"Proceedings of the IEEE 23rd Northeast Bioengineering Conference","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132402890","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}
Pub Date : 1997-05-21DOI: 10.1109/NEBC.1997.594951
R. King
When the human body is near a 50-60 Hz high-voltage power line or a high-power VLF transmitter, electric fields and currents are induced in the different organs. Their interaction with cellular processes can only be studied if their directions and magnitudes are accurately known. This paper examines models and methods that have been used to determine them.
{"title":"Models and methods for determining induced ELF and VLF electromagnetic fields in the human body: a critical study","authors":"R. King","doi":"10.1109/NEBC.1997.594951","DOIUrl":"https://doi.org/10.1109/NEBC.1997.594951","url":null,"abstract":"When the human body is near a 50-60 Hz high-voltage power line or a high-power VLF transmitter, electric fields and currents are induced in the different organs. Their interaction with cellular processes can only be studied if their directions and magnitudes are accurately known. This paper examines models and methods that have been used to determine them.","PeriodicalId":393788,"journal":{"name":"Proceedings of the IEEE 23rd Northeast Bioengineering Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130119086","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}
Pub Date : 1997-05-21DOI: 10.1109/NEBC.1997.594942
S.A. Soldan, S. Reisman, M. Bergen, R. Servatius
Our goal was to record electrocardiogram (ECG) and respiration data from an awake, freely moving rat. The technique presented here requires simple surgery in which two electrodes and a ground wire are placed subcutaneously across the chest, which is externalized via a connector on the top of the subjects head. From these leads it is possible to collect ECG in a standard two lead configuration, and respiration with impedance pneumography. Utilizing electrode placement and signal filtering we were able to obtain ECG from anaesthetized, and awake rats without the effects of motion artifact. Respiration was collected with little effect of motion in all but one subject which displayed excessive movement.
{"title":"Instrumentation of the awake unrestrained rat for ECG and respiration","authors":"S.A. Soldan, S. Reisman, M. Bergen, R. Servatius","doi":"10.1109/NEBC.1997.594942","DOIUrl":"https://doi.org/10.1109/NEBC.1997.594942","url":null,"abstract":"Our goal was to record electrocardiogram (ECG) and respiration data from an awake, freely moving rat. The technique presented here requires simple surgery in which two electrodes and a ground wire are placed subcutaneously across the chest, which is externalized via a connector on the top of the subjects head. From these leads it is possible to collect ECG in a standard two lead configuration, and respiration with impedance pneumography. Utilizing electrode placement and signal filtering we were able to obtain ECG from anaesthetized, and awake rats without the effects of motion artifact. Respiration was collected with little effect of motion in all but one subject which displayed excessive movement.","PeriodicalId":393788,"journal":{"name":"Proceedings of the IEEE 23rd Northeast Bioengineering Conference","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132889231","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}
Pub Date : 1997-05-21DOI: 10.1109/NEBC.1997.594950
R. Kasevich, S. Price, S. Selikowitz, J. Lacourse, W.M. Smith
A novel catheter antenna for microwave medical applications has been developed. The antenna provides an end-fire heating pattern and dielectric bifurcated choke to minimize current leakage. The concept employed for end-fire performance involves impedance loading on the antenna structure to achieve a traveling wave distribution of current. The antenna need not be in contact with the endocardium for successful launching of the microwave energy in the end-fire direction. Simply pointing it at the target tissue is sufficient to create deep lesions. The capacitive loading effect on the antenna by myocardium and catheter construction are considered in the design of the system for optimum radiation and energy coupling efficiency. Numerical modeling provides a way to optimize the design of antennas such as the catheterized end-fire antenna discussed previously. The numerical electromagnetics code (NEC-4) a method-of-moments code and XFDTD which employs a finite-difference time domain technique are examples. Data are presented using NEC-4 showing how the heating pattern at microwave frequency can become end-fire by moving an impedance load to the correct position on the antenna. The value of the impedance load on the antenna and position were determined using Romberg integration to solve for the antenna's expansion parameter.
{"title":"End-fire catheter antenna for microwave ablation of the endocardium","authors":"R. Kasevich, S. Price, S. Selikowitz, J. Lacourse, W.M. Smith","doi":"10.1109/NEBC.1997.594950","DOIUrl":"https://doi.org/10.1109/NEBC.1997.594950","url":null,"abstract":"A novel catheter antenna for microwave medical applications has been developed. The antenna provides an end-fire heating pattern and dielectric bifurcated choke to minimize current leakage. The concept employed for end-fire performance involves impedance loading on the antenna structure to achieve a traveling wave distribution of current. The antenna need not be in contact with the endocardium for successful launching of the microwave energy in the end-fire direction. Simply pointing it at the target tissue is sufficient to create deep lesions. The capacitive loading effect on the antenna by myocardium and catheter construction are considered in the design of the system for optimum radiation and energy coupling efficiency. Numerical modeling provides a way to optimize the design of antennas such as the catheterized end-fire antenna discussed previously. The numerical electromagnetics code (NEC-4) a method-of-moments code and XFDTD which employs a finite-difference time domain technique are examples. Data are presented using NEC-4 showing how the heating pattern at microwave frequency can become end-fire by moving an impedance load to the correct position on the antenna. The value of the impedance load on the antenna and position were determined using Romberg integration to solve for the antenna's expansion parameter.","PeriodicalId":393788,"journal":{"name":"Proceedings of the IEEE 23rd Northeast Bioengineering Conference","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132178640","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}
Pub Date : 1997-05-21DOI: 10.1109/NEBC.1997.594966
T. Alvarez, J. Semmlow
Inward turning of the two eyes, termed disparity vergence, sometimes exhibits two closely-spaced, fast dynamic movements. These response doubles can provide information on the neural processes that control the fast, dynamic response. The second component of this pair could be generated by either an internal process or by external error from visual feedback. To differentiate between these two mechanisms, a comparison was made between doubles induced experimentally (using a "forced-error" protocol) and those that occur naturally in standard step responses. The two stimulus conditions produced response doubles with different timing properties. Since the forced-error doubles were generated by visual feedback, differences in timing imply that normally occurring double responses are mediated by an internal mechanism. This internal feedback mechanism is likely to be involved in the production and control of the fast dynamic portion of all vergence eye movements.
{"title":"Neural processing in vergence eye movements: a time based study","authors":"T. Alvarez, J. Semmlow","doi":"10.1109/NEBC.1997.594966","DOIUrl":"https://doi.org/10.1109/NEBC.1997.594966","url":null,"abstract":"Inward turning of the two eyes, termed disparity vergence, sometimes exhibits two closely-spaced, fast dynamic movements. These response doubles can provide information on the neural processes that control the fast, dynamic response. The second component of this pair could be generated by either an internal process or by external error from visual feedback. To differentiate between these two mechanisms, a comparison was made between doubles induced experimentally (using a \"forced-error\" protocol) and those that occur naturally in standard step responses. The two stimulus conditions produced response doubles with different timing properties. Since the forced-error doubles were generated by visual feedback, differences in timing imply that normally occurring double responses are mediated by an internal mechanism. This internal feedback mechanism is likely to be involved in the production and control of the fast dynamic portion of all vergence eye movements.","PeriodicalId":393788,"journal":{"name":"Proceedings of the IEEE 23rd Northeast Bioengineering Conference","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131854652","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}
Pub Date : 1997-05-21DOI: 10.1109/NEBC.1997.594960
G. Norris, E. Wilson
The Eye Mouse is a communication aid designed for the severely disabled. Specifically, it provides the user with a means to control an ordinary PC mouse with a combination of eye movements and blinks. By constantly monitoring the electrooculogram signal (EOG) of the user, the Eye Mouse (EM) is able to recognize several intentional eye motions and in turn, control a cursor on the PC screen.
{"title":"The Eye Mouse, an eye communication device","authors":"G. Norris, E. Wilson","doi":"10.1109/NEBC.1997.594960","DOIUrl":"https://doi.org/10.1109/NEBC.1997.594960","url":null,"abstract":"The Eye Mouse is a communication aid designed for the severely disabled. Specifically, it provides the user with a means to control an ordinary PC mouse with a combination of eye movements and blinks. By constantly monitoring the electrooculogram signal (EOG) of the user, the Eye Mouse (EM) is able to recognize several intentional eye motions and in turn, control a cursor on the PC screen.","PeriodicalId":393788,"journal":{"name":"Proceedings of the IEEE 23rd Northeast Bioengineering Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124222955","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：