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检索条件"任意字段=Conference on Smart Biomedical and Physiological Sensor Technology XIII"

共 126 条记录，以下是41-50 订阅

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Optimization of oxygen sensitive optical dye membrane polymers for fluorescent lifetime based physiological biosensing

Optimization of oxygen sensitive optical dye membrane polyme...

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conference on smart biomedical and physiological sensor technology

作者： Chatni, M. R. Maier, D. E. Porterfield, D. M. Purdue Univ Bindley Biosci Ctr Physiol Sensing Facil W Lafayette IN 47906 USA Purdue Univ Dept Arg & Biol Eng W Lafayette IN 47906 USA Purdue Univ Weldon Sch Biomed Engn W Lafayette IN 47906 USA Purdue Univ Dept Hort & Landscape Architecture W Lafayette IN 47906 USA

ISBN: (纸本)9780819469199

Fiber optic based sensor technologies have many significant advantages over electrochemical sensors, and as a result have broad application for sensing in biology, agriculture and medicine. An important component of fiber optic biosensor is the sensing element. Usually, a polymer matrix containing the analyte specific fluorescent dye is immobilized on one end of the fiber optic probe. The polymer matrix provides mechanical stability to the immobilized membrane and entraps the fluorescent dye molecules. The target analyte diffuses into the membrane polymer and quenches the fluorescent dye. This optical interaction between the analyte and fluorescent dye dynamically changes the fluorescence lifetime of the dye. These changing fluorescent lifetimes reveal information about the target analyte concentration. Although the fluorescent lifetime of the dye is of primary interest, high signal-to-noise ratio (SNR) is also very desirable. Conventionally, complex electronics is implemented to achieve high SNR_ Various signal processing methods such as signal amplification and filtering are implemented to achieve high SNR_ In this study, we report optical signal amplification by modification of the dye-polymer matrix by addition of titanium oxide particles. The addition of titanium oxide particles enhanced the optical signal intensity. Optical performances of different sizes and concentrations of titanium oxide particles are compared. We believe that this increased optical intensity is due to increased optical scattering in the dye-polymer matrix. We also compare the performance of titanium oxide particles to gold and other material particles to experimentally probe the exact nature of light scattering in the dye-polymer matrix.

关键词： optrode fluorescent lifetime titanium (IV) oxide microparticles oxygen multiple scattering

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Wireless sensor network-based smart room system for healthcare monitoring

Wireless sensor network-based smart room system for healthca...

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2011 IEEE International conference on Robotics and Biomimetics, ROBIO 2011

作者： Arnil, Jetsada Punsawad, Yunyong Wongsawat, Yodchanan Department of Biomedical Engineering Mahidol University Thailand

ISBN: (纸本)9781457721373

In this paper, the utilization of Zigbee as wireless sensor network (WSN) for medical application is demonstrated. The combination of various topologies is used to configure wireless sensors network to achieve high efficiency network architecture in medicine. The network consists of center coordinator, routers and sensor nodes. Mesh network is used for the connection between coordinator and router for range expansion. A performance of the proposed modality is tested in the normal situation. Besides, the architecture of the smart room systems is also proposed for healthcare monitoring. physiological data and signal are transmitted using Xbee which is a wireless device operated in unlicensed radio frequency bands. © 2011 IEEE.

关键词： Routers

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Does glucose affect our vision? A preliminary study using smart glasses

Does glucose affect our vision? A preliminary study using sm...

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2023 IEEE EMBS Special Topic conference on Data Science and Engineering in Healthcare, Medicine and Biology, IEEECONF 2023

作者： Piaseczna, Natalia Doniec, Rafal Sieciński, Szymon Grzegorzek, Marcin Tkacz, Ewaryst Silesian University of Technology Faculty of Biomedical Engineering Department of Biosensors and Processing of Biomedical Signals Roosevelta 40 Zabrze41-800 Poland University of Lübeck Institute of Medical Informatics Ratzeburger Allee 160 Lübeck23562 Germany Fraunhofer Imte Mönkhofer Weg 239a Lübeck23562 Germany

ISBN: (纸本)9798350383386

In this study, we investigate the relationship between blood glucose levels and visual acuity during simulated driving using smart glasses and machine learning. We found compelling correlations between blood glucose levels and visual performance, with a classification accuracy of 98.70%. These results highlight the importance of blood glucose regulation for road safety and human well-being, and the potential of wearable sensor technology to advance our understanding of physiological influences on human performance. © 2023 IEEE.

关键词： Wearable sensors

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sensor Probes and Phantoms for Advanced Transcranial Magnetic Stimulation System Developments 12

Sensor Probes and Phantoms for Advanced Transcranial Magneti...

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conference on smart biomedical and physiological sensor technology XII

作者： Meng, Qinglei Patel, Prashil Trivedi, Sudhir Du, Xiaoming Hong, Elliot Choa, Fow-Sen Univ Maryland Baltimore Cty Dept Comp Sci & Elect Engn Baltimore MD 21228 USA Brimrose Corp Hunt Valley Loveton Ctr Sparks MD 21152 USA Univ Maryland Sch Med Dept Psychiat MPRCUMB Baltimore MD 21201 USA Maryland Psychiat Res Ctr Baltimore MD 21228 USA

ISBN: (纸本)9781628416039

Transcranial magnetic stimulation (TMS) has become one of the most widely used noninvasive method for brain tissue stimulation and has been used as a treatment tool for various neurological and psychiatric disorders including migraine, stroke, Parkinson's disease, dystonia, tinnitus and depression. In the process of developing advanced TMS deep brain stimulation tools, we need first to develop field measurement devices like sensory probes and brain phantoms, which can be used to calibrate the TMS systems. Currently there are commercially available DC magnetic or electric filed measurement sensors, but there is no instrument to measure transient fields. In our study, we used a commercial figure-8 shaped TMS coil to generate transient magnetic field and followed induced field and current. The coil was driven by power amplified signal from a pulse generator with tunable pulse rate, amplitude, and duration. In order to obtain a 3D plot of induced vector electric field, many types of probes were designed to detect single component of electric-field vectors along x, y and z axis in the space around TMS coil. We found that resistor probes has an optimized signal-to-noise ratio (SNR) near 3k ohm but it signal output is too weak compared with other techniques. We also found that inductor probes can have very high output for Curl E measurement, but it is not the E-field distribution we are interested in. Probes with electrical wire wrapped around iron coil can directly measure induced E-field with high sensitivity, which matched computer simulation results.

关键词： TMS induced electric field sensing

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Development of a depolarized Raman spectrometer for potential surface-enhanced Raman optical activity (SEROA) measurements

Development of a depolarized Raman spectrometer for potentia...

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conference on smart biomedical and physiological sensor technology VIII

作者： Li, Honggang BioTools Inc Jupiter FL 33458 USA

ISBN: (纸本)9780819485991

Raman optical activity (ROA) spectroscopy is a chiral sensitive vibrational spectroscopic technique that measures the difference of molecular responses to either left or right circularly polarized photon radiation. As a structural sensitive probe, ROA has great potential applications in fabricating bio-molecular sensors due to its capability of capturing small changes in molecular structure. However, ROA is a weak effect on the order of 10(-3) or 10(-4) smaller than its parent spontaneous Raman. Extension of ROA to widely sensing applications can be accelerated by combining it with surface plasmon resonance effect, surface-enhanced Raman spectroscopy (SERS), allowing for trace chemical detections. However, it has been shown to be very challenging to combine SERS with ROA to obtain a reliable surface-enhanced Raman optical activity measurement by several independent ROA research groups. This is because of the complexity of interaction of chiral molecules with metal surfaces. In addition, another main factor for the difficulty is the lack of a depolarized ROA spectrometer which can remove effectively huge polarized Raman bands, generally the major sources of artifacts in ROA. In this paper, we will discuss the development of a depolarized Raman spectrometer. This newly developed depolarized Raman instrument is based on the BioTools' ChiralRAMAN-2X scattered circular polarization (SCP) ROA spectrometer and has been modified into a dual circular polarization ROA spectrometer with the introducing circularity conversion in the incident radiation path. Combing the simultaneous detection of left and right circularly polarized scattering photons, newly developed Raman instrument are capable of modulate both incident and scattered light simultaneously resulting dual circular polarization (DCP) ROA measurements from depolarized parent Raman scattering. The performance of the Raman spectrometer has been initially evaluated with standard sample of small molecules for the proof-o

关键词： ROA DCP SERS SEROA depolarized sensor

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Nanofluidic Structures for Coupled Sensing and Remediation of Toxins 11

Nanofluidic Structures for Coupled Sensing and Remediation o...

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conference on smart biomedical and physiological sensor technology XI

作者： Shaw, K. Contento, N. M. Xu, Wei Bohn, P. W. Univ Notre Dame Dept Chem & Biomol Engn Notre Dame IN 46556 USA Univ Notre Dame Dept Chem & Biochem Notre Dame IN 46556 USA

ISBN: (纸本)9781628410440

One foundational motivation for chemical sensing is that knowledge of the presence and level of a chemical agent informs decisions about treatment of the agent, for example by sequestration, separation or chemical conversion to a less harmful substance. Commonly the sensing and treatment steps are separate. However, the disjoint detection/treatment approach is neither optimal, nor required. Thus, we are investigating how nanostructured architectures can be constructed so that molecular transport (analyte/reagent delivery), chemical sensing (optical or electrochemical) and subsequent treatment can all be coupled in the same physical space during the same translocation event. Chemical sensors that are uniquely well-poised for integration into 3-D micro-/nanofluidic architectures include those based on plasmonics and impedance. Following detection, treatment can be substantially enhanced if mass transport limitations can be overcome. In this context, in situ generation of reactive species within confined geometries, such as nanopores or nanochannels, is of significant interest, because of its potential utility in overcoming mass transport limitations in chemical reactivity. Solvent electrolysis in electrochemically coupled nanochannels supporting electrokinetic flow for the generation of reactive species, can produce arbitrarily tunable quantities of reagents, such as O-2 or H-2, in situ in close proximity to the site of a hydrogenation catalyst, for example. Semi-quantitative estimates of the local H2 concentration are obtained by comparing the spatiotemporal fluorescence behavior and current measurements with finite element simulations accounting for electrolysis and subsequent convection and diffusion within the confined geometry. H2 saturation can easily be achieved at modest overpotentials.

关键词： sensor nanofluidic impedance toxin remediation

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A Novel Symmetric Key Compact to Reliable Connection between sensor Nodes Using Exploitable Features of ECG

A Novel Symmetric Key Compact to Reliable Connection between...

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2022 International conference on Innovative Computing, Intelligent Communication and smart Electrical Systems, ICSES 2022

作者： Riya, K.S. Sudhakar, J. Ravichandran, M. Tamilselvi, M. Sajiv, G. Vel Tech Multi Tech Dr Rangerajan Dr Sakunthala Engineering College Department of Computer Science and Engineering Chennai India Chennai Institute of Technology Kundrathur Department of Biomedical Engineering Chennai600069 India K. Ramakrishnan College of Engineering Department of Mechanical Engineering Trichy621 112 India T.S.Srinivasan Centre for Polytechnic College and Advanced Training Department of Mechatronics Engineering Vanagaram Chennai600 095 India SIMATS Saveetha School of Engineering Department of ECE Chennai602105 India

ISBN: (数字)9781665474139

ISBN: (纸本)9781665474139

Wireless sensor networks (WSNs) have evolved to serve a diverse multitude of uses, including field of health and social systems, as a result of advancements in the technology. In sensing devices, a wireless body area network (WBAN) is a particularly unique network technology that is meant to operate continuously to connect smart equipment and equipment implanted both in and out of person that are used for lengthy healthcare monitoring within even outside a medical environment. A WBAN is a network of sensor nodes that are implanted in and/or fastened on the individual body for the purpose of tracking the individual's physiological features. Although the growth of WBAN technology has the potential to considerably assist medical healthcare systems, the collection and transmission of private physiological data in such an open setting poses severe security and privacy issues. Throughout this research, we offer a unique key-agreement mechanism for securing communications between sensor nodes of wireless body area networks (WBANs). In order to communicate, the suggested technique relies on the measurement and verification of shared physiological properties at both the transmitter and receiver sensors. In contrast to current protocols, the suggested protocol allows communicating sensors to leverage their prior session pre-knowledge for encrypted communication during a certain length of time, as opposed to existing protocols. Thus, the time necessary for creating the shared key will be reduced. In addition, extracted characteristics will not be repeated in the medium, preventing listening attacks while keeping the unpredictability of the key. The experimental outcomes show the efficacy of the suggested key agreement existing protocols of both the image retrieval and the key establishment phases, with an efficiency of 99.50 percent and an error rate of 0.005 percent in both the image retrieval and based consensus phases. When compared to current key agreement methods, the sug

关键词： sensor nodes

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smart Healthcare: Cloud-Enabled Body sensor Networks 14

Smart Healthcare: Cloud-Enabled Body Sensor Networks

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14th Annual IEEE International conference on Wearable and Implantable Body sensor Networks (BSN)

作者： Yu, Ruoxi Mak, Tony W. C. Zhang, Ruikai Wong, Sunny H. Zheng, Yali Lau, James Y. W. Poon, Carmen C. Y. Chinese Univ Hong Kong Dept Surg Shatin Hong Kong Peoples R China Chinese Univ Hong Kong State Key Lab Digest Dis Inst Digest Dis Dept Med & TherapeutLi Ka Slung Inst Hlth Sci Hong Kong Hong Kong Peoples R China

ISBN: (纸本)9781509062447

Body sensors are now commonly used as ingestible, wearable and implantable devices for clinical diagnosis and continuous physiological monitoring. Nevertheless, they usually have limited resources. Recent advancements in technologies provide a possible solution to mitigate the resource limitation of these devices by connecting them with mobile devices and cloud services. To evaluate the feasibility of the cloud-enabled body sensor networks, this paper presents simulation results on testing the feasibility of 24-hour operating time and concurrent user support for the cloud-enabled applications.

关键词： Cloud computing biomedical monitoring Mobile handsets Monitoring Body sensor networks Wearable sensors

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Design of a Multi-sensor Wearable physiological Parameters Monitoring System Using Machine Learning Algorithm

Design of a Multi-Sensor Wearable Physiological Parameters M...

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2024 International conference on smart Electronics and Communication Systems, ISENSE 2024

作者： Prabakaran, Aarthy Rufus, Elizabeth School of Electronics Engineering Vellore Institute of Technology Vellore India

ISBN: (纸本)9798331528126

An aging population and changing lifestyles have led to an increase in health problems, necessitating a robust and scalable medical system. A healthy society can be fostered by implementing a comprehensive health tracking system that enables early disease detection and continuous remote healthcare monitoring. This can be achieved by employing a wearable healthcare monitoring system, that can assist the medical sector in reducing hospitalizations and facilitating early diagnosis. To address this need, a Wearable physiological Monitoring System (W-PMS) is proposed in this study. A prototype has been developed with the capability to record electrocardiography (ECG), photoplethysmography (PPG), and body temperature, and calculate crucial vital parameters such as heart rate, saturation of peripheral oxygen (SpO2) level, and blood pressure (BP). The W-PMS comprises three sensor modules integrated with a microcontroller to collect the physiological data. The acquired physiological data are processed by the microcontroller to calculate certain parameters such as heart rate and SpO2 level. The acquired data are pushed to the cloud to estimate the BP through an indigenous Android application. The data transmission between the microcontroller and the application occurs via Bluetooth communication. The final results are visualized on a mobile device, enabling users to track their health status. In conclusion, wearable devices incorporating biomedical sensors have the potential to remotely monitor an individual's health condition. © 2024 IEEE.

关键词： Blood pressure

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Biochemical microsensors on the basis of metabolically sensitive hydrogels

Biochemical microsensors on the basis of metabolically sensi...

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conference on Electroactive Polymer Actuators and Devices (EAPAD) 2011

作者： Guenther, Margarita Gerlach, Gerald Wallmersperger, Thomas Solzbacher, Florian Magda, Jules J. Lin, Genyao Tathireddy, Prashant Orthner, Michael P. Tech Univ Dresden Solid State Elect Lab IFE Helmholtzstr 10 D-01069 Dresden Germany Tech Univ Dresden Inst Solid Mech IFKM D-01062 Dresden Germany Univ Utah Dept Elect & Comp Engn Salt Lake City UT 84112 USA Univ Utah Dept Mat Sci & Engn Salt Lake City UT 84112 USA

ISBN: (纸本)9780894185380

With the rapid development of micro systems technology and microelectronics, smart electronic systems are emerging for the continuous surveillance of relevant parameters in the body and even for closed-loop systems with a sensor feedback to drug release systems. With respect to diabetes management, there is a critical societal need for a sensor that can be used to continuously measure a patient's blood glucose concentration twenty four hours a day on a long-term basis. In this work, thin films of "stimuli-responsive" or "smart" hydrogels were combined with microfabricated piezoresistive pressure transducers to obtain "chemomechanical sensors" that can serve as selective and versatile wireless biomedical sensors. The sensitivity of hydrogels with regard to the concentration of glucose in solutions with physiological pH, ionic strength and temperature was investigated in vitro. The response of the glucose-sensitive hydrogel was studied at different regimes of the glucose concentration change and at different temperatures. sensor response time and accuracy with which a sensor can track gradual changes in glucose was estimated.

关键词： piezoresistive sensor biochemical sensor polyelectrolyte hydrogel glucose-sensitive pH-sensitive swelling behavior biomedical applications

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