keyword
MENU ▼
Read by QxMD icon Read
search

Wearable devices

keyword
https://www.readbyqxmd.com/read/28335276/flexible-textile-based-organic-transistors-using-graphene-ag-nanoparticle-electrode
#1
Youn Kim, Yeon Ju Kwon, Kang Eun Lee, Youngseok Oh, Moon-Kwang Um, Dong Gi Seong, Jea Uk Lee
Highly flexible and electrically-conductive multifunctional textiles are desirable for use in wearable electronic applications. In this study, we fabricated multifunctional textile composites by vacuum filtration and wet-transfer of graphene oxide films on a flexible polyethylene terephthalate (PET) textile in association with embedding Ag nanoparticles (AgNPs) to improve the electrical conductivity. A flexible organic transistor can be developed by direct transfer of a dielectric/semiconducting double layer on the graphene/AgNP textile composite, where the textile composite was used as both flexible substrate and conductive gate electrode...
August 16, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28327115/clinically-acceptable-agreement-between-the-vimove-wireless-motion-sensor-system-and-the-vicon-motion-capture-system-when-measuring-lumbar-region-inclination-motion-in-the-sagittal-and-coronal-planes
#2
Hanne Leirbekk Mjøsund, Eleanor Boyle, Per Kjaer, Rune Mygind Mieritz, Tue Skallgård, Peter Kent
BACKGROUND: Wireless, wearable, inertial motion sensor technology introduces new possibilities for monitoring spinal motion and pain in people during their daily activities of work, rest and play. There are many types of these wireless devices currently available but the precision in measurement and the magnitude of measurement error from such devices is often unknown. This study investigated the concurrent validity of one inertial motion sensor system (ViMove) for its ability to measure lumbar inclination motion, compared with the Vicon motion capture system...
March 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28326116/comparison-of-wearable-activity-tracker-with-actigraphy-for-sleep-evaluation-and-circadian-rest-activity-rhythm-measurement-in-healthy-young-adults
#3
Hyun-Ah Lee, Heon-Jeong Lee, Joung-Ho Moon, Taek Lee, Min-Gwan Kim, Hoh In, Chul-Hyun Cho, Leen Kim
OBJECTIVE: The purpose of this study was to evaluate the applicability of data obtained from a wearable activity tracker (Fitbit Charge HR) to medical research. This was performed by comparing the wearable activity tracker (Fitbit Charge HR) with actigraphy (Actiwatch 2) for sleep evaluation and circadian rest-activity rhythm measurement. METHODS: Sixteen healthy young adults (female participants, 62.5%; mean age, 22.8 years) wore the Fitbit Charge HR and the Actiwatch 2 on the same wrist; a sleep log was recorded over a 14-day period...
March 2017: Psychiatry Investigation
https://www.readbyqxmd.com/read/28325014/real-time-monitoring-of-swimming-performance
#4
R Delgado-Gonzalo, A Lemkaddem, Ph Renevey, E Muntane Calvo, M Lemay, K Cox, D Ashby, J Willardson, M Bertschi
This article presents the performance results of a novel algorithm for swimming analysis in real-time within a low-power wrist-worn device. The estimated parameters are: lap count, stroke count, time in lap, total swimming time, pace/speed per lap, total swam distance, and swimming efficiency (SWOLF). In addition, several swimming styles are automatically detected. Results were obtained using a database composed of 13 different swimmers spanning 646 laps and 858.78 min of total swam time. The final precision achieved in lap detection ranges between 99...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324980/effect-of-wearable-sensor-dynamics-on-physical-activity-estimates-a-comparison-between-sci-vs-healthy-individuals
#5
C Jayaraman, C K Mummidisetty, A Jayaraman
Accuracy of physical activity estimates predicted by activity monitoring technologies may be affected by device location, analysis algorithms, type of technology (i.e. wearable/stickable) and population demographics (disability) being studied. Consequently, the main purpose of this investigation was to study such sensor dynamics (i.e. effect of device location, type and population demographics on energy expenditure estimates) of two commercial activity monitors. It was hypothesized that device location, population studied (disability), choice of proprietary algorithm and type of technology used will significantly impact the accuracy of the predicted physical activity metrics...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324936/a-preliminary-study-on-multi-wavelength-ppg-based-pulse-transit-time-detection-for-cuffless-blood-pressure-measurement
#6
Jing Liu, Yuan-Ting Zhang, Xiao-Rong Ding, Wen-Xuan Dai, Ni Zhao
Pulse transit time (PTT) has been widely studied as an index of blood pressure (BP) changes. In recent years, some prototypes of PTT-based wearable BP measurement devices have been developed, which can relieve users from the discomfort caused by the inflating cuff used in auscultatory and oscillometric BP measurement techniques. However, in the common practice for PTT detection, multi-site sensor implementation on human body is required, making it difficult for the integration of wearable devices. Since multi-wavelength (MW) photoplethysmogram (PPG) signals carry blood pulsation information of different blood vessels embedded in different skin depths, the time difference between different wavelength PPG signals collected at the same body site can be treated as a special PTT on a short length of blood vessels beneath the skin...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324934/hand-rehabilitation-after-stroke-using-a-wearable-high-dof-spring-powered-exoskeleton
#7
Tianyao Chen, Peter S Lum
Stroke patients often have inappropriate finger flexor activation and finger extensor weakness, which makes it difficult to open their affected hand for functional grasp. The goal was to develop a passive, lightweight, wearable device to enable improved hand function during performance of activities of daily living. The device, HandSOME II, assists with opening the patient's hand using 11 elastic actuators that apply extension torques to finger and thumb joints. Device design and initial testing are described...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28323410/zno-quantum-dots-decorated-zn2sno4-nanowire-heterojunction-photodetectors-with-drastic-performance-enhancement-and-flexible-ultraviolet-image-sensors
#8
Ludong Li, Leilei Gu, Zheng Lou, Zhiyong Fan, Guozhen Shen
Here we report fabrication of high-performance ultraviolet photodetectors based on a unique heterojunction device structure in which ZnO quantum dots were used to decorate Zn2SnO4 nanowires. Systematic investigations have shown their ultrahigh light-to-dark current ratio (up to 6.8 × 104), specific detectivity (up to 9.0×1017 Jones), photoconductive gain (up to 1.1 × 107), fast response, and excellent stability. Compared with a pristine Zn2SnO4 nanowire, a quantum dots decorated nanowire demonstrated about 10 times higher photocurrent and responsivity...
March 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28318904/dual-memory-neural-networks-for-modeling-cognitive-activities-of-humans-via-wearable-sensors
#9
Sang-Woo Lee, Chung-Yeon Lee, Dong-Hyun Kwak, Jung-Woo Ha, Jeonghee Kim, Byoung-Tak Zhang
Wearable devices, such as smart glasses and watches, allow for continuous recording of everyday life in a real world over an extended period of time or lifelong. This possibility helps better understand the cognitive behavior of humans in real life as well as build human-aware intelligent agents for practical purposes. However, modeling the human cognitive activity from wearable-sensor data stream is challenging because learning new information often results in loss of previously acquired information, causing a problem known as catastrophic forgetting...
February 20, 2017: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/28318227/boosting-fiber-shaped-photodetectors-via-soft-interfaces
#10
Zhengfeng Zhu, Dan Ju, Yousheng Zou, Yuhui Dong, Linbao Luo, Tengfei Zhang, Dan Shan, Haibo Zeng
The lightweight, flexible fiber-shaped devices that can be woven into wearable electronic products has caught great attentions in recent years. However the bending and poor interfaces of fiber-shaped devices typically leads to ineluctable performance degradation, which is still a great challenge to be dealt with. Here, taking fiber-shaped photodetector as an example, we proposed an effective strategy, constructing inorganic-organic-graphene hybrid interfaces on a single fiber, to greatly improve the performances of fiber-shaped device...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28306209/crab-chitin-based-2d-soft-nanomaterials-for-fully-biobased-electric-devices
#11
Jun You, Mingjie Li, Beibei Ding, Xiaochen Wu, Chaoxu Li
2D nanomaterials have various size/morphology-dependent properties applicable in electronics, optics, sensing, and actuating. However, intensively studied inorganic 2D nanomaterials are frequently hindered to apply in some particular and industrial fields, owing to harsh synthesis, high-cost, cytotoxicity, and nondegradability. Endeavor has been made to search for biobased 2D nanomaterials with biocompatibility, sustainability, and biodegradability. A method of hydrophobization-induced interfacial-assembly is reported to produce an unprecedented type of nanosheets from marine chitin...
March 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28306196/flexible-sensing-electronics-for-wearable-attachable-health-monitoring
#12
REVIEW
Xuewen Wang, Zheng Liu, Ting Zhang
Wearable or attachable health monitoring smart systems are considered to be the next generation of personal portable devices for remote medicine practices. Smart flexible sensing electronics are components crucial in endowing health monitoring systems with the capability of real-time tracking of physiological signals. These signals are closely associated with body conditions, such as heart rate, wrist pulse, body temperature, blood/intraocular pressure and blood/sweat bio-information. Monitoring such physiological signals provides a convenient and non-invasive way for disease diagnoses and health assessments...
March 17, 2017: Small
https://www.readbyqxmd.com/read/28303674/simultaneous-recording-of-ultrasound-and-polysomnography-during-natural-sleep-in-patients-with-obstructive-sleep-apnea-a-pilot-study
#13
Jeng-Wen Chen, Chih-Chung Huang, Chi-Kai Weng, Chun-Hsiang Chang, Shou-Jen Wang
Tongue base deformation may play a critical role in the phenomenon of obstructive sleep apnea, but polysomnography provides limited information regarding the effect of tongue motion during natural sleep. We reported on preliminary results of combining a novel ultrasound system and polysomnography for simultaneous recordings during natural sleep in volunteers and patients with obstructive sleep apnea. All participants underwent time-synchronized polysomnography and submental transcutaneous ultrasound examinations...
March 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28303432/network-coded-cooperative-communication-in-a-real-time-wireless-hospital-sensor-network
#14
R Prakash, A Balaji Ganesh, Somu Sivabalan
The paper presents a network coded cooperative communication (NC-CC) enabled wireless hospital sensor network architecture for monitoring health as well as postural activities of a patient. A wearable device, referred as a smartband is interfaced with pulse rate, body temperature sensors and an accelerometer along with wireless protocol services, such as Bluetooth and Radio-Frequency transceiver and Wi-Fi. The energy efficiency of wearable device is improved by embedding a linear acceleration based transmission duty cycling algorithm (NC-DRDC)...
May 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28302596/estimating-accuracy-at-exercise-intensities-a-comparative-study-of-self-monitoring-heart-rate-and-physical-activity-wearable-devices
#15
Erin E Dooley, Natalie M Golaszewski, John B Bartholomew
BACKGROUND: Physical activity tracking wearable devices have emerged as an increasingly popular method for consumers to assess their daily activity and calories expended. However, whether these wearable devices are valid at different levels of exercise intensity is unknown. OBJECTIVE: The objective of this study was to examine heart rate (HR) and energy expenditure (EE) validity of 3 popular wrist-worn activity monitors at different exercise intensities. METHODS: A total of 62 participants (females: 58%, 36/62; nonwhite: 47% [13/62 Hispanic, 8/62 Asian, 7/62 black/ African American, 1/62 other]) wore the Apple Watch, Fitbit Charge HR, and Garmin Forerunner 225...
March 16, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28299934/antibacterial-composite-film-based-triboelectric-nanogenerator-for-harvesting-walking-energy
#16
Guangqin Gu, Changbao Han, Jingjing Tian, Cunxin Lu, Chuan He, Tao Jiang, Zhou Li, Zhong Lin Wang
As a green and eco-friendly technology, triboelectric nanogenerator (TENG) can harvest energy from human motion to generate electricity, so TENGs have been widely applied in wearable electronic devices to replace the traditional batteries. However, the surface of these TENGs is easy to be contaminated and breed bacteria, which is a threat to human health. Here, we report an antibacterial composite film-based triboelectric nanogenerator (ACF-TENG) that uses Ag exchanged zeolite (Ag-zeolite) and polypropylene (PP) composite film as the triboelectric layer...
March 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28296900/wireless-transmission-of-biosignals-for-hyperbaric-chamber-applications
#17
Carlos Perez-Vidal, Luis Gracia, Cristian Carmona, Bartomeu Alorda, Antonio Salinas
This paper presents a wireless system to send biosignals outside a hyperbaric chamber avoiding wires going through the chamber walls. Hyperbaric chambers are becoming more and more common due to new indications of hyperbaric oxygen treatments. Metallic walls physically isolate patients inside the chamber, where getting a patient's vital signs turns into a painstaking task. The paper proposes using a ZigBee-based network to wirelessly transmit the patient's biosignals to the outside of the chamber. In particular, a wearable battery supported device has been designed, implemented and tested...
2017: PloS One
https://www.readbyqxmd.com/read/28294279/smart-wearable-kevlar-based-safeguarding-electronic-textile-with-excellent-sensing-performance
#18
Sheng Wang, Shouhu Xuan, Mei Liu, Linfeng Bai, Shuaishuai Zhang, Min Sang, Wanquan Jiang, Xinglong Gong
A novel S-ST/MWCNT/Kevlar-based wearable electronic textile (WET) with enhanced safeguarding performance and force sensing ability was fabricated. Stab resistance performance tests under quasi-static and dynamic conditions show that the maximum resistance force and penetration impact energy for the WET are 18 N and 11.76 J, which represent a 90% and 50% increment with respect to the neat Kevlar, respectively. Dynamic impact resistance tests show that the WET absorbs all the impact energy. The maximum resistance force of the WET is 1052 N, which represents an improvement of about 190% with respect to neat Kevlar...
March 15, 2017: Soft Matter
https://www.readbyqxmd.com/read/28291825/development-and-evaluation-of-a-soft-wearable-weight-support-device-for-reducing-muscle-fatigue-on-shoulder
#19
Daegeun Park, Kyu-Jin Cho
Compensating the weight of human limbs is important in reducing muscle fatigue experienced by manual laborers. In this study, a compact and lightweight soft wearable weight support device was developed and evaluated. The device supports gravitational force on the shoulder at any arm posture, although there are some limitations in its assistive performance. The device actuator consists of a cam-rod structure, a tendon-driven mechanism, and a rubber band. The desired assistive torque is translated to the shoulder joint along a tendon routing structure...
2017: PloS One
https://www.readbyqxmd.com/read/28290206/diverse-applications-of-nanomedicine
#20
Beatriz Pelaz, Christoph Alexiou, Ramon A Alvarez-Puebla, Frauke Alves, Anne M Andrews, Sumaira Ashraf, Lajos P Balogh, Laura Ballerini, Alessandra Bestetti, Cornelia Brendel, Susanna Bosi, Monica Carril, Warren C W Chan, Chunying Chen, Xiaodong Chen, Xiaoyuan Chen, Zhen Cheng, Daxiang Cui, Jianzhong Du, Christian Dullin, Alberto Escudero, Neus Feliu, Mingyuan Gao, Michael George, Yury Gogotsi, Arnold Grünweller, Zhongwei Gu, Naomi J Halas, Norbert Hampp, Roland K Hartmann, Mark C Hersam, Patrick Hunziker, Ji Jian, Xingyu Jiang, Philipp Jungebluth, Pranav Kadhiresan, Kazunori Kataoka, Ali Khademhosseini, Jindřich Kopeček, Nicholas A Kotov, Harald F Krug, Dong Soo Lee, Claus-Michael Lehr, Kam W Leong, Xing-Jie Liang, Mei Ling Lim, Luis M Liz-Marzán, Xiaowei Ma, Paolo Macchiarini, Huan Meng, Helmuth Möhwald, Paul Mulvaney, Andre E Nel, Shuming Nie, Peter Nordlander, Teruo Okano, Jose Oliveira, Tai Hyun Park, Reginald M Penner, Maurizio Prato, Victor Puntes, Vincent M Rotello, Amila Samarakoon, Raymond E Schaak, Youqing Shen, Sebastian Sjöqvist, Andre G Skirtach, Mahmoud G Soliman, Molly M Stevens, Hsing-Wen Sung, Ben Zhong Tang, Rainer Tietze, Buddhisha N Udugama, J Scott VanEpps, Tanja Weil, Paul S Weiss, Itamar Willner, Yuzhou Wu, Lily Yang, Zhao Yue, Qian Zhang, Qiang Zhang, Xian-En Zhang, Yuliang Zhao, Xin Zhou, Wolfgang J Parak
The design and use of materials in the nanoscale size range for addressing medical and health-related issues continues to receive increasing interest. Research in nanomedicine spans a multitude of areas, including drug delivery, vaccine development, antibacterial, diagnosis and imaging tools, wearable devices, implants, high-throughput screening platforms, etc. using biological, nonbiological, biomimetic, or hybrid materials. Many of these developments are starting to be translated into viable clinical products...
March 14, 2017: ACS Nano
keyword
keyword
39003
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"