Article
Materials Science, Multidisciplinary
Amirhossein Hajiaghajani, Peter Tseng
Summary: This study demonstrates the implementation of coupled magnetic resonances in wearable sensing systems, aiming to address issues faced by wearable sensors including restrictive read-out distances, tradeoffs in size/spectral performance, and unreliable sensor tracking. By integrating secondary receiver coils and enhancing wireless telemetry, the size of sensors and their spectral response are completely decoupled, allowing for co-measurement with human respiration among other applications.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Review
Computer Science, Theory & Methods
Nhu-Ngoc Dao
Summary: This review article investigates the latest characteristics of IoWT, identifies its advancements and benefits from 6G technologies, describes IoWT interconnectivity architectures and application scenarios, and discusses the challenges to drive future research.
FUTURE GENERATION COMPUTER SYSTEMS-THE INTERNATIONAL JOURNAL OF ESCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Fengyuan Yang, Dat T. Nguyen, Brian O. Raeker, Anthony Grbic, John S. Ho
Summary: This paper proposes a method to improve wireless signal transmission using cascaded metasurfaces. By using deeply subwavelength cascaded metasurfaces at the interface between air and biological tissue, the efficiency of signal transmission can be enhanced.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Lei Zhang, Panyue Lin, Kailian Deng, Gan Huang, Jiayi Feng
Summary: The article investigates the key concerns of energy life and quality of service (QoS) for smart clothing and simulates the multi-posture participation. By optimizing parameters such as energy consumption, path loss, and transmission delay, a joint optimization problem is formulated. Simulation results show that various algorithms achieve certain optimization effects.
IEEE SENSORS JOURNAL
(2022)
Review
Chemistry, Physical
Kai Zhang, Ping Jack Soh, Sen Yan
Summary: The Wireless Body Area Network (WBAN) has gained increasing attention across various sectors, with wearable antennas facing challenges such as electromagnetic coupling with the human body and physical deformations. Recent developments in metamaterial-based antennas for WBAN applications show promising advancements in enhancing performance while minimizing impact on the user's body.
Article
Chemistry, Multidisciplinary
Wei Fan, Tong Liu, Fan Wu, Shujuan Wang, Shengbo Ge, Yunhong Li, Jinlin Liu, Haoran Ye, Ruixin Lei, Chan Wang, Qiuling Che, Yi Li
Summary: A skin-core structure polyurethane/graphene encapsulated temperature-sensitive fiber with high sensitivity, super-resolution, and fast response has been successfully prepared. The fabric made from this fiber can be used for real-time body temperature monitoring.
Article
Chemistry, Multidisciplinary
Minglu Zhu, Zhiran Yi, Bin Yang, Chengkuo Lee
Summary: This review discusses the applications of wearable and implantable piezoelectric nanogenerator (PENG) and triboelectric nanogenerator (TENG) in digitizing the human body, exploring different mechanical stimuli and materials. It also explores the potential of self-powered physical sensors and the enhancement of energy generation and sensing performance through hybrid systems.
Article
Computer Science, Information Systems
Hongru Li, Guiling Sun, Yue Li, Runzhuo Yang
Summary: The purpose of wearable technology is to integrate specific technology into user clothes or accessories using multimedia, sensors, and wireless communication. This technology has been widely used in patient monitoring and health management due to its low-load, mobile, and easy-to-use characteristics. In this paper, a Wi-Fi-based physiological monitoring system was established to accurately measure heart rate, body surface temperature, and motion data, as well as quickly detect and alert users of abnormal heart rates.
Article
Chemistry, Analytical
Michal Pielka, Pawel Janik, Malgorzata A. Janik, Zygmunt Wrobel
Summary: Modern systems of intelligent sensors commonly use radio data transmission. This study proposes a wearable solution for hand movement acquisition using Wi-Fi standard and an adaptive algorithm for controlling radio data transmission, reducing power consumption and data transfer while maintaining signal quality.
Article
Chemistry, Analytical
Taisuke Iguchi, Ikuma Kondo, Jianqing Wang
Summary: In this study, a communication module based on human body communication was developed to wirelessly control a wearable robot hand based on myoelectric signals. The module utilizes a 10-60 MHz band and an impulse radio multi-pulse position modulation method to achieve high data rate with low transmission loss. The size of the module was reduced by sharing the myoelectric signal detection electrode and transmitting electrode, while different receiving electrode structures were investigated to improve signal transmission performance. The experiment demonstrated that the communication module achieved a 100% packet detection rate and a bit error rate of less than 10 (6) up to at least 110 cm along the arm, successfully enabling proper control of the wearable robot hand based on a human subject's myoelectric signals.
Article
Engineering, Electrical & Electronic
Longsheng Lu, Zehong Li, Hengfei He, Yingxi Xie, Wentao Wang
Summary: Inspired by the geometry of slit receptor on spiders, researchers developed a crack-based strain sensor using a simple and cost-effective method. The sensor showed superfast response time, balanced sensitivity and strain range, and good reliability. Combined with a wireless transmission system, the sensor enables real-time monitoring of human health and movements.
IEEE SENSORS JOURNAL
(2022)
Article
Robotics
Christopher Nesler, Gray Thomas, Nikhil Divekar, Elliott J. Rouse, Robert D. Gregg
Summary: This article introduces a modular lower-limb exoskeleton, M-BLUE, which can reduce muscle fatigue, improve lifting posture, and benefit individuals with mobility disabilities. It has the potential for significant applications in a heterogeneous population.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Zhenyong Han
Summary: This paper introduces a method of extracting sports information target heart rate signal using adaptive algorithm, which eliminates misdetection and missed detection through automatic weighted average and exponential weighted average, resulting in more accurate and stable data.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Yasin Cotur, Selin Olenik, Tarek Asfour, Michael Bruyns-Haylett, Michael Kasimatis, Ugur Tanriverdi, Laura Gonzalez-Macia, Hong Seok Lee, Andrei S. Kozlov, Firat Guder
Summary: This article introduces a continuous wearable respiration sensor inspired by the lateral line system of fish, capable of detecting mechanical disturbances in water. The sensor continuously measures respiratory activity by sensing the force applied to an air channel embedded in silicone-based elastomeric material, potentially enabling early detection of disorders resulting in altered respiratory patterns.
ADVANCED MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Zhu Liu, Zhipeng Li, Jinxin Li, Pei Xiao, Yongfeng Qiu, Gaosheng Li, John S. Ho
Summary: This brief introduces a body-wide RF energy harvester based on textile spoof surface plasmon (SSP) antenna array for wearable wireless power transmission. The harvester includes four patch antennas and SSP waveguides integrated with clothing to harvest the incident RF energy. A loop and rectifier are fabricated in the same plane to extract, combine, rectify, and output DC power from the harvested energy. The design shows potential for wirelessly powering wearable sensors.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Chemistry, Multidisciplinary
Tianyiyi He, Hao Wang, Jiahui Wang, Xi Tian, Feng Wen, Qiongfeng Shi, John S. Ho, Chengkuo Lee
Article
Chemistry, Multidisciplinary
Yang Li, Xi Tian, Si-Ping Gao, Lin Jing, Kerui Li, Haitao Yang, Fanfan Fu, Jim Yang Lee, Yong-Xin Guo, John S. Ho, Po-Yen Chen
ADVANCED FUNCTIONAL MATERIALS
(2020)
Review
Engineering, Electrical & Electronic
Zhipeng Li, Xi Tian, Cheng-Wei Qiu, John S. Ho
Summary: This review examines the development of metasurfaces for bioelectronic interfaces, exploring how they can be used to control electromagnetic fields in the vicinity of the human body and their potential application in current and emerging healthcare technologies.
NATURE ELECTRONICS
(2021)
Article
Engineering, Biomedical
Viveka Kalidasan, Xin Yang, Ze Xiong, Renee R. Li, Haicheng Yao, Hareesh Godaba, Sybil Obuobi, Priti Singh, Xin Guan, Xi Tian, Selman A. Kurt, Zhipeng Li, Devika Mukherjee, Ravisankar Rajarethinam, Choon Seng Chong, Jiong-Wei Wang, Pui Lai Rachel Ee, Weiqiang Loke, Benjamin C. K. Tee, Jianyong Ouyang, Christopher J. Charles, John S. Ho
Summary: Monitoring surgical wounds post-operatively is crucial to prevent infections and complications. Multifilament surgical sutures with conductive polymer and capacitive sensors operated via radiofrequency identification can accurately monitor the physicochemical states of deep surgical sites.
NATURE BIOMEDICAL ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Xin Yang, Xi Tian, Qihang Zeng, Zhipeng Li, Dat T. Nguyen, John S. Ho
Summary: This study presents a radio frequency sensor made from conductive textile that allows for sensitive noncontact monitoring of human vital signs. The sensor uses a unique structure and operating mode to track heartbeat and respiration through measurements of the radio frequency spectrum. Experiments show that the sensor's measurements are comparable to gold standard sensors and remain robust during daily activities.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Physics, Multidisciplinary
Zhipeng Li, Chenhui Li, Ze Xiong, Guoqiang Xu, Yongtai Raymond Wang, Xi Tian, Xin Yang, Zhu Liu, Qihang Zeng, Rongzhou Lin, Ying Li, Jason Kai Wei Lee, John S. Ho, Cheng-Wei Qiu
Summary: Noise is a challenge for sensors in daily environments, but this study introduces stochastic exceptional points that can reverse the negative effect of noise. By utilizing stochastic resonance, the added noise actually enhances the system's ability to detect weak signals. Demonstrations using a wearable wireless sensor show that the stochastic exceptional points improve the accuracy of vital signs tracking during exercise. This research has the potential to create a new class of sensors that can overcome and benefit from ambient noise for various applications.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Xi Tian, Qihang Zeng, Selman A. Kurt, Renee R. Li, Dat T. Nguyen, Ze Xiong, Zhipeng Li, Xin Yang, Xiao Xiao, Changsheng Wu, Benjamin C. K. Tee, Denys Nikolayev, Christopher J. Charles, John S. Ho
Summary: The authors used metamaterial textiles to achieve direct wireless networking between implanted bioelectronic devices at the scale of the human body, enabling distributed networks that can sense health conditions and deliver therapy throughout the body. This work establishes a wireless technology for precise and adaptive bioelectronic therapies using body-integrated devices.
NATURE COMMUNICATIONS
(2023)
Proceedings Paper
Biophysics
Dat T. Nguyen, Qihang Zeng, Xi Tian, John S. Ho
Summary: Vital sign monitoring is crucial for assessing an individual's health, and non-contact sensing methods using wireless technology offer a comfortable and convenient alternative. This study presents an integrated system based on microwave metamaterials and software-defined Doppler radar for non-contact vital sign monitoring through clothing. Experimental results demonstrate the system's accuracy in respiration and cardiac sensing, compared to electrocardiography as the gold standard.
2022 IEEE MTT-S INTERNATIONAL MICROWAVE BIOMEDICAL CONFERENCE (IMBIOC)
(2022)
Article
Engineering, Electrical & Electronic
Xi Tian, Qihang Zeng, Denys Nikolayev, John S. Ho
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2020)
Proceedings Paper
Computer Science, Information Systems
Xi Tian, Xin Yang, John S. Ho
2019 IEEE BIOMEDICAL CIRCUITS AND SYSTEMS CONFERENCE (BIOCAS 2019)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Xi Tian, Mengying Zhang, John S. Ho
2019 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM (IMS)
(2019)
Article
Engineering, Electrical & Electronic
Xi Tian, Pui Mun Lee, Yu Jun Tan, Tina L. Y. Wu, Haicheng Yao, Mengying Zhang, Zhipeng Li, Kian Ann Ng, Benjamin C. K. Tee, John S. Ho
NATURE ELECTRONICS
(2019)
