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- 2019
- Topological change
- Multi-hop routing
- low latency
- Wearable Wireless Sensor Network
- wearable devices
- Communication Engineering
- Shenyang Ligong University
- Northeastern University
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Plasmonic colored nanopaper: a potential preventive healthcare tool against threats emerging from uncontrolled UV exposure
摘要： Preventive healthcare is crucial to hinder or delay the onset of disease, furthermore it contributes to healthy and productive lifestyles and saves resources allocated to public health. Herein, we explore how the plasmonic coupling of silver and gold nanoparticles embedded within nanopaper allows for potential preventive healthcare tools based on a change in plasmonic color. Particularly, we selected UV radiation exposure as a potential threat to health to be monitored via plasmonic colored nanopaper (PCN). Uncontrolled UV radiation exposure is not only known to provoke epidermal damage, but also to trigger leaching of hazardous compounds from polycarbonate containers. In this context, we engineered UV-responsive PCN devices whose sensing mechanism is based on UV photodegradation of silver nanoparticles. Since absorbance and scattering of metal nanoparticles strongly depend on their size and inter-particle distance, the resulting PCN detectors are able to warn of the potential UV radiation-induced threat via a visually observable plasmonic color change with a yellowish/reddish transition. Epidermal experiments with tattoo-like PCN devices prove the resulting detectors can change in color upon safe dose of sun exposure. Moreover, PCN detectors stuck on polycarbonate containers also change in color after moderate sun exposure. This cost-effective and lightweight nanophotonic device leads to a versatile preventive healthcare tool.
关键词： smart packaging,nanoplasmonics,wearable devices,nanocellulose,nanophotonics
更新于2025-09-23 15:19:57
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[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Tm-Doping Concentration Influence on Tm:GGAG Lasing and Tenability at 2 ??m Spectral Region
摘要： Smart-fabric interactive-textile systems offer exciting new possibilities, provided that they exhibit sufficient robustness and autonomy to be reliably deployed in critical applications. Textile multiantenna systems, unobtrusively integrated in a professional garment, are key components of such systems, as they set up energy-efficient and stable wireless body-centric communication links. Yet, their functionality may be further extended by exploiting their surface as energy-harvesting platform. Different state-of-the-art energy harvesters are suitable for compact integration onto a textile antenna. We demonstrate this by integrating a power management system, together with multiple diverse scavenging transducers and a storage module, on a well-chosen textile antenna topology. We provide guidelines to ensure that the additional hardware does not affect the textile antenna’s performance. Simultaneous scavenging from different energy sources significantly increases the autonomy of a wearable system, in the meanwhile reducing battery size.
关键词： smart fabrics,Energy harvesting,energy storage,textile antenna,interactive textiles,wearable antenna,energy management
更新于2025-09-23 15:19:57
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Teaching a Standalone Optics and Lasers Course Using Project-Based Learning
摘要： The identification of invalid data in recordings obtained using wearable sensors is of particular importance since data obtained from mobile patients is, in general, noisier than data obtained from nonmobile patients. In this paper, we present a signal quality index (SQI), which is intended to assess whether reliable heart rates (HRs) can be obtained from electrocardiogram (ECG) and photoplethysmogram (PPG) signals collected using wearable sensors. The algorithms were validated on manually labeled data. Sensitivities and specificities of 94% and 97% were achieved for the ECG and 91% and 95% for the PPG. Additionally, we propose two applications of the SQI. First, we demonstrate that, by using the SQI as a trigger for a power-saving strategy, it is possible to reduce the recording time by up to 94% for the ECG and 93% for the PPG with only minimal loss of valid vital-sign data. Second, we demonstrate how an SQI can be used to reduce the error in the estimation of respiratory rate (RR) from the PPG. The performance of the two applications was assessed on data collected from a clinical study on hospital patients who were able to walk unassisted.
关键词： Battery life,wearable sensors,respiratory rate (RR),electrocardiogram (ECG),signal quality,telemonitoring,photoplethysmogram (PPG)
更新于2025-09-23 15:19:57
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Fast-response humidity sensor based on laser printing for respiration monitoring
摘要： Respiration monitoring equipment has wide applications in daily health monitoring and modern medical diagnosis. Despite significant progress being made in humidity sensors for respiration monitoring, the fabrication of the humidity sensors with low-cost, simple manufacturing process and easy integration remains a challenge. This work reports a facile and inexpensive laser printing fabrication of PEDOT:PSS micron line as a humidity sensor for respiration monitoring. Laser printing technology can process any material into an arbitrary pattern. The PEDOT:PSS micron line humidity sensor has a fast response–recovery time (0.86 s/0.59 s), demonstrating excellent performance for real-time monitoring of human respiration. Furthermore, the PEDOT:PSS micron line humidity sensor can also monitor the respiration of rats under different physiological conditions along with the drug injection. The PEDOT:PSS micron line humidity sensor features simple manufacturing process with commercial materials, and easy integration with wearable devices. This work paves an important step in real-time monitoring of human health and further physiology and pharmacology study.
关键词： respiration monitoring,laser printing,wearable devices,PEDOT:PSS,humidity sensor
更新于2025-09-23 15:19:57
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[IEEE 2019 14th International Conference on Computer Engineering and Systems (ICCES) - Cairo, Egypt (2019.12.17-2019.12.17)] 2019 14th International Conference on Computer Engineering and Systems (ICCES) - Analog Control Algorithm-Based a Photovoltaic Energy Harvesting System for Low-Power Medical Applications
摘要： One of the attractive solutions used for supplying low-power medical applications is the photovoltaic (PV) energy harvesting system. In this paper, the proposed PV energy harvesting system is composed of a photovoltaic panel, a DC-DC boost converter, a fixed resistive load and an analog control algorithm. This algorithm is designed based on the output load current. The algorithm is implemented using the multisim program. This algorithm is simple, efficient, low cost and low power consumption because it measures only the output current parameter and does not need multipliers. The power consumption of the proposed load is approximately 39.24 mW. Therefore, the expected working duration of the load is 20.9 hours under continuously operation of the light for 4 hours. Finally, the simulation results illustrate the transient characteristics of the proposed PV system.
关键词： Medical wearable sensor nodes,Energy harvesting,Multisim,Photovoltaic,Maximum power point (MPP)
更新于2025-09-23 15:19:57
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[IEEE 2019 7th International Youth Conference on Energy (IYCE) - Bled, Slovenia (2019.7.3-2019.7.6)] 2019 7th International Youth Conference on Energy (IYCE) - Analysis of losses and power quality disturbances of grid connected PV system with different load profiles
摘要： Recent advances in biosensors, medical instrumentation, and information processing and communication technologies (ICT) have enabled significant improvements in healthcare. However, these technologies have been mainly applied in clinical environments, such as hospitals and healthcare facilities, under managed care by well-trained and specialized individuals. The global challenge of providing quality healthcare at affordable cost leads to the proposed paradigm of Preventive, Personalized, and Precision Medicine that requires a seamless use of technology and infrastructure support for patients and healthcare providers at point-of-care (POC) locations including homes, semi or pre-clinical facilities, and hospitals. The complexity of the global healthcare challenge necessitates strong collaborative interdisciplinary synergies involving all stakeholder groups including academia, federal research institutions, industry, regulatory agencies, and clinical communities. It is critical to evolve with collaborative efforts on the translation of research to technology development toward clinical validation and potential healthcare applications. This special issue is focused on technology innovation and translational research for POC applications with potential impact in improving global healthcare in the respective areas. Some of these papers were presented at the NIH-IEEE Strategic Conference on Healthcare Innovations and POC Technologies for Precision Medicine (HI-POCT) held at the NIH on November 9–10, 2015. The papers included in the Special Issue provide a spectrum of critical issues and collaborative resources on translational research of advanced POC devices and ICT into global healthcare environment.
关键词： medical devices,personalized medicine,home based monitoring,patient monitoring,Point-of-care technologies,healthcare innovation,medical informatics,wearable devices,preventive medicine,precision medicine
更新于2025-09-23 15:19:57
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Flexible Liquida??Filled Fiber Adapter Enabled Wearable Optical Sensors
摘要： Wearable optical sensors are attracting intensive research interests owing to their advantage of high sensitivity, fast response, and immunity to electromagnetic interferences. However, tunable optical properties and reconfigurable sensor structures remain great challenges for the wearable optical sensors. Herein, flexible liquid-filled fiber adapters (FLFFAs), which are sensitive to mechanical stimuli, are demonstrated. The novel FLFFA consists of a soft liquid-filled tubing and two silica optical fibers. The liquid core bestows the FLFFA both tunability and reconfigurability in sensing performance. Deformation of the tubing through bending or pressing results in wavelength-insensitive changes in light transmission. By measuring the output intensity, the FLFFA based sensors achieve high angle resolution (0.18°) and low detection limit (0.7 mN) for bending and pressure sensing, respectively. The superior sensing properties together with mechanical flexibility and robustness enable real-time monitoring of finger joint motion, respiration, and wrist pulse. Benefiting from an LED charge-coupled device (CCD) signal recording system, a 4 × 3 keyboard is realized by simultaneously measuring the output signals of 12 FLFFAs. The FLFFA provides a promising method to detect subtle physiological signals and may find applications in healthcare devices, artificial skins, and sensor networks.
关键词： wearable optical sensors,human–machine interface devices,physiological signal monitoring,liquid-filled fiber adapters
更新于2025-09-23 15:19:57
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[IEEE 2019 IEEE SENSORS - Montreal, QC, Canada (2019.10.27-2019.10.30)] 2019 IEEE SENSORS - Fast response hydrogel-based plasmonic sensor substrate for the detection of ethanol
摘要： Decades of heavy investment in laboratory-based brain imaging and neuroscience have led to foundational insights into how humans sense, perceive, and interact with the external world. However, it is argued that fundamental differences between laboratory-based and naturalistic human behavior may exist. Thus, it remains unclear how well the current knowledge of human brain function translates into the highly dynamic real world. While some demonstrated successes in real-world neurotechnologies are observed, particularly in the area of brain-computer interaction technologies, innovations and developments to date are limited to a small science and technology community. We posit that advancements in real-world neuroimaging tools for use by a broad-based workforce will dramatically enhance neurotechnology applications that have the potential to radically alter human–system interactions across all aspects of everyday life. We discuss the efforts of a joint government-academic-industry team to take an integrative, interdisciplinary, and multi-aspect approach to translate current technologies into devices that are truly ?eldable across a range of environments. Results from initial work, described here, show promise for dramatic advances in the ?eld that will rapidly enhance our ability to assess brain activity in real-world scenarios.
关键词： brain computer interfaces,data acquisition,biomarkers,translational research,brain computer interaction,monitoring,wearable sensors,body sensor networks,electroencephalography,Behavioral science
更新于2025-09-23 15:19:57
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[IEEE 2018 7th Electronic System-Integration Technology Conference (ESTC) - Dresden, Germany (2018.9.18-2018.9.21)] 2018 7th Electronic System-Integration Technology Conference (ESTC) - Hybrid (PI-PDMS) Superhydrophobic Wearable Dry-Patching Flexible and Transparent Substrate
摘要： The hybrid thin film is fabricated by using polyimide (PI) and Polydimethylsiloxane (PDMS) to take combined advantages of their transparency, thermal stability and stretchability. Furthermore, another importance of such subtract is superhydrophobicity, having highly water repellent, dustproof and self-cleaning effect which is beneficial for its long-term performance. The demand for dry patching has been increased as compared with wet patching films due to optical transmittance and long term optimization, the patching devices mechanism for those devices can be mechanical deformation experienced with bending, pressing, twisting and pressing, without any compromise on the comfort of the user, those mechanical characteristics leads towards the adhesion of the substrate via van der Waals force without using any wet adhesion. The actively explored field of flexible and wearable applications are in healthcare and artificial electronic skins which are interestingly capable of detecting stress, strain, pain and temperature in real-time health monitoring. Since superhydrophobic properties combine with dry patching techniques provide a wide range of practical applications for the platform of the wearable dry patching substrate, it is expected that such works have an impact on flexible hybrid electronic (FHE) devices which can be rolled, stretched patching superhydrophobic substrate utilizing a polymer casting method showing a static CA and CAH angle of 179° and 10°, respectively, by creating the air pocket between the micro pillars (30μm) which counterbalances the water droplet on the surface. Such hybrid in microelectronics applications; it provides more desirable properties in many fields of application (mechanical, thermal, optical and chemical). In this article, we discussed the fabrication of a dry-patching substrate using hybrid film that has a superhydrophobic surface substrates are widely used bent. The fabricated and dry.
关键词： Wearable Devices,Dry Patching,Flexible,Self-Cleaning,Superhydrophobic,Low Hysteresis
更新于2025-09-23 15:19:57
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All-printed, low-cost, tunable sensing range strain sensors based on Ag nanodendrite conductive inks for wearable electronics
摘要： Flexible and wearable strain sensors with high stretchability and high sensitivity have been studied intensively. However, the achievement of low-cost, rapid mass production and high performance of wearable strain sensors remains a challenge. In this study, Ag nanodendrite (ND) inks with good printability for varieties of substrates are prepared, which can be directly screen-printed onto nitrile rubber to manufacture strain sensors. Printed strain sensors (PSSs) with diverse working strain ranges and sensitivities can be simultaneously obtained by printing versatile geometric patterns. Comparatively, straight-line PSSs with a linewidth of 2 mm exhibit high electrical conductivity (1.14 × 10^5 S m^-1), a large sensing range (105%), high sensitivity (maximum gauge factor = 294.3), an ultra-fast response time (18 ms), and long-term stability (more than three weeks). Additionally, the sensing mechanism of the PSSs is further investigated by observing their surface topographies. Eventually, a smart glove based on PSSs is used for monitoring human motion (finger bending, wrist bending, walking, etc.) and gesture actions, demonstrating the potential applications of Ag ND-based PSSs in wearable electronic devices and human–machine interaction intelligent systems.
关键词： strain sensor,tunable sensing range,wearable electronics,screen printing,Ag nanodendrite
更新于2025-09-19 17:15:36