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https://www.readbyqxmd.com/read/28437640/the-woven-fiber-organic-electrochemical-transistors-based-on-polypyrrole-nanowires-reduced-graphene-oxide-composites-for-glucose-sensing
#1
Yuedan Wang, Xing Qing, Quan Zhou, Yang Zhang, Qiongzhen Liu, Ke Liu, Wenwen Wang, Mufang Li, Zhentan Lu, Yuanli Chen, Dong Wang
Novel woven fiber organic electrochemical transistors based on polypyrrole (PPy) nanowires and reduced graphene oxide (rGO) have been prepared. SEM revealed that the introduction of rGO nanosheets could induce the growth and increase the amount of PPy nanowires. Moreover, it could enhance the electrical performance of fiber transistors. The hybrid transistors showed high on/off ratio of 10(2), fast switch speed, and long cycling stability. The glucose sensors based on the fiber organic electrochemical transistors have also been investigated, which exhibited outstanding sensitivity, as high as 0...
April 14, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28436882/home-based-therapy-after-stroke-using-the-hand-spring-operated-movement-enhancer-handsome
#2
Ji Chen, Diane Nichols, Elizabeth B Brokaw, Peter S Lum
In previous work, we developed a lightweight wearable hand exoskeleton (HandSOME) that improves range of motion and function in laboratory testing. In this pilot study, we added the ability to log movement data for extended periods and recruited 10 chronic stroke subjects to use the device during reach and grasp task practice at home for 1.5 hours/day, 5 days per week, for 4 weeks. Seven subjects completed the study, performing 448 ± 651 hand movements per training day. After training, impairment was reduced (Fugl-Meyer Test; gain=4...
April 18, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28436841/two-wire-bus-combining-full-duplex-body-sensor-network-and-multilead-biopotential-measurements
#3
Michael Rapin, Josias Wacker, Olivier Chetelat
Classical approaches to make high-quality measurements of biopotential signals require the use of shielded or multiwire cables connecting the electrodes to a central unit in a star arrangement. As a consequence, increasing the number of leads increases cabling and connector complexity which is not only limiting the patient comfort but is also anticipated as the main limiting factor to future miniaturization and cost reduction of tomorrow's wearables. We have recently introduced a novel sensing architecture that significantly reduces the cabling complexity by eliminating shielded or multiwire cables and by allowing simple connectors thanks to a bus arrangement...
April 24, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28436600/high-performance-integrated-self-package-flexible-li-o2-battery-based-on-stable-composite-anode-and-flexible-gas-diffusion-layer
#4
Xiao-Yang Yang, Ji-Jing Xu, Di Bao, Zhi-Wen Chang, Da-Peng Liu, Yu Zhang, Xin-Bo Zhang
With the rising development of flexible and wearable electronics, corresponding flexible energy storage devices with high energy density are required to provide a sustainable energy supply. Theoretically, rechargeable flexible Li-O2 batteries can provide high specific energy density; however, there are only a few reports on the construction of flexible Li-O2 batteries. Conventional flexible Li-O2 batteries possess a loose battery structure, which prevents flexibility and stability. The low mechanical strength of the gas diffusion layer and anode also lead to a flexible Li-O2 battery with poor mechanical properties...
April 24, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28436270/does-physiological-stress-slowdown-wound-healing-in-patients-with-diabetes
#5
Javad Razjouyan, Gurtej Singh Grewal, Talal K Talal, David G Armstrong, Joseph L Mills, Bijan Najafi
BACKGROUND: Poor healing is an important contributing factor to amputation among patients with diabetic foot ulcers (DFUs). Physiological stress may slow wound healing and increase susceptibility to infection. OBJECTIVES: The objective was to examine the association between heart rate variability (HRV) as an indicator of physiological stress response and healing speed (HealSpeed) among outpatients with active DFUs. DESIGN AND METHODS: Ambulatory patients with diabetes with DFUs (n = 25, age: 59...
April 1, 2017: Journal of Diabetes Science and Technology
https://www.readbyqxmd.com/read/28433867/validity-and-repeatability-of-inertial-measurement-units-for-measuring-gait-parameters
#6
Edward P Washabaugh, Tarun Kalyanaraman, Peter G Adamczyk, Edward S Claflin, Chandramouli Krishnan
Inertial measurement units (IMUs) are small wearable sensors that have tremendous potential to be applied to clinical gait analysis. They allow objective evaluation of gait and movement disorders outside the clinic and research laboratory, and permit evaluation on large numbers of steps. However, repeatability and validity data of these systems are sparse for gait metrics. The purpose of this study was to determine the validity and between-day repeatability of spatiotemporal metrics (gait speed, stance percent, swing percent, gait cycle time, stride length, cadence, and step duration) as measured with the APDM Opal IMUs and Mobility Lab system...
April 12, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28432935/accelerometry-based-assessment-and-detection-of-early-signs-of-balance-deficits
#7
Heidi Similä, Milla Immonen, Miikka Ermes
Falls are the cause for more than half of the injury-related hospitalizations among older people. Accurate assessment of individuals' fall risk could enable targeted interventions to reduce the risk. This paper presents a novel method for using wearable accelerometers to detect early signs of deficits in balance from gait. Gait acceleration data were analyzed from 35 healthy female participants (73.86±5.40 years). The data were collected with waist-mounted accelerometer and the participants performed three supervised balance tests: Berg Balance Scale (BBS), Timed-Up-and-Go (TUG) and 4m walk...
April 13, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28431622/quantitative-biomechanical-assessment-of-trunk-control-in-huntington-s-disease-reveals-more-impairment-in-static-than-dynamic-tasks
#8
Deb A Kegelmeyer, Sandra K Kostyk, Nora E Fritz, Marianne M Fiumedora, Ajit Chaudhari, Marilly Palettas, Gregory Young, Anne D Kloos
Postural instability is common in individuals with Huntington's disease (HD), yet little is known about control of the trunk during static and dynamic activities. We compared the trunk motion of 41 individuals with HD and 36 controls at thoracic and pelvic levels during sitting, standing, and walking using wearable iPod sensors. We also examined the ability of individuals with HD to respond to an auditory cue to modify trunk position when the pelvis moved >8° in sagittal or frontal planes during sitting using custom software...
May 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28430147/suitability-of-strain-gage-sensors-for-integration-into-smart-sport-equipment-a-golf-club-example
#9
Anton Umek, Yuan Zhang, Sašo Tomažič, Anton Kos
Wearable devices and smart sport equipment are being increasingly used in amateur and professional sports. Smart sport equipment employs various sensors for detecting its state and actions. The correct choice of the most appropriate sensor(s) is of paramount importance for efficient and successful operation of sport equipment. When integrated into the sport equipment, ideal sensors are unobstructive, and do not change the functionality of the equipment. The article focuses on experiments for identification and selection of sensors that are suitable for the integration into a golf club with the final goal of their use in real time biofeedback applications...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28429757/soft-electronics-enabled-ergonomic-human-computer-interaction-for-swallowing-training
#10
Yongkuk Lee, Benjamin Nicholls, Dong Sup Lee, Yanfei Chen, Youngjae Chun, Chee Siang Ang, Woon-Hong Yeo
We introduce a skin-friendly electronic system that enables human-computer interaction (HCI) for swallowing training in dysphagia rehabilitation. For an ergonomic HCI, we utilize a soft, highly compliant ("skin-like") electrode, which addresses critical issues of an existing rigid and planar electrode combined with a problematic conductive electrolyte and adhesive pad. The skin-like electrode offers a highly conformal, user-comfortable interaction with the skin for long-term wearable, high-fidelity recording of swallowing electromyograms on the chin...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28429542/study-of-the-wearable-cardioverter-defibrillator-in-advanced-heart-failure-patients-swift
#11
Alon Barsheshet, Valentina Kutyifa, Theodora Vamvouris, Arthur J Moss, Yitschak Biton, Leway Chen, Eugene Storozynsky, Chingping Wan, Steven J Szymkiewicz, Ilan Goldenberg
INTRODUCTION: The wearable cardioverter defibrillator (WCD) may allow stabilization until reassessment for an implantable cardioverter defibrillator (ICD) among high-risk HF patients. However, there are limited data on the WCD benefit in the acute decompensated HF setting. METHODS AND RESULTS: The Study of the Wearable Cardioverter Defibrillator in Advanced Heart-Failure Patients (SWIFT) was a prospective clinical trial carried out at two medical centers. Patients hospitalized with advanced HF symptoms and reduced left ventricular ejection function (LVEF) were enrolled and prescribed a WCD prior to discharge for a total of 3 months...
April 21, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28429276/enhancing-thermal-stability-of-a-highly-concentrated-insulin-formulation-with-pluronic-f-127-for-long-term-use-in-microfabricated-implantable-devices
#12
Jason Li, Michael K Chu, Brian Lu, Sako Mirzaie, Kuan Chen, Claudia R Gordijo, Oliver Plettenburg, Adria Giacca, Xiao Yu Wu
Development of highly concentrated formulations of protein and peptide drugs is a major challenge due to increased susceptibility to aggregation and precipitation. Numerous drug delivery systems including implantable and wearable controlled-release devices require thermally stable formulations with high concentrations due to limited device sizes and long-term use. Herein we report a highly concentrated insulin gel formulation (up to 80 mg/mL, corresponding to 2200 IU/mL), stabilized with a non-ionic amphiphilic triblock copolymer (i...
April 20, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28428979/use-of-consumer-wearable-devices-to-promote-physical-activity-a-review-of-health-intervention-studies
#13
Steven S Coughlin, Jessica Stewart
BACKGROUND: Although many wearable devices for monitoring and tracking physical activity are available to consumers, relatively few research studies have been conducted to determine their efficacy in promoting health. METHODS: In this article, data on the use of consumer wearable devices in promoting healthy behaviors are summarized based upon bibliographic searches in PubMed and Psychology and Behavioral Sciences Collection with relevant search terms through September 2016...
November 2016: Journal of Environment and Health Sciences
https://www.readbyqxmd.com/read/28428770/prolonged-walking-with-a-wearable-system-providing-intelligent-auditory-input-in-people-with-parkinson-s-disease
#14
Pieter Ginis, Elke Heremans, Alberto Ferrari, Kim Dockx, Colleen G Canning, Alice Nieuwboer
Rhythmic auditory cueing is a well-accepted tool for gait rehabilitation in Parkinson's disease (PD), which can now be applied in a performance-adapted fashion due to technological advance. This study investigated the immediate differences on gait during a prolonged, 30 min, walk with performance-adapted (intelligent) auditory cueing and verbal feedback provided by a wearable sensor-based system as alternatives for traditional cueing. Additionally, potential effects on self-perceived fatigue were assessed...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28426512/technology-in-s-c-assessing-bodyweight-squat-technique-with-wearable-sensors
#15
Martin A O'Reilly, Darragh F Whelan, Tomas E Ward, Eamonn Delahunt, Brian M Caulfield
Strength and conditioning (S&C) coaches offer expert guidance to help those they work with achieve their personal fitness goals. However it is not always practical to operate under the direct supervision of an S&C coach and consequently individuals are often left training without expert oversight. Recent developments in inertial measurement units (IMUs) and mobile computing platforms have allowed for the possibility of unobtrusive motion tracking systems and the provision of real-time individualised feedback regarding exercise performance...
April 15, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28425667/soft-multifunctional-composites-and-emulsions-with-liquid-metals
#16
REVIEW
Navid Kazem, Tess Hellebrekers, Carmel Majidi
Binary mixtures of liquid metal (LM) or low-melting-point alloy (LMPA) in an elastomeric or fluidic carrier medium can exhibit unique combinations of electrical, thermal, and mechanical properties. This emerging class of soft multifunctional composites have potential applications in wearable computing, bio-inspired robotics, and shape-programmable architectures. The dispersion phase can range from dilute droplets to connected networks that support electrical conductivity. In contrast to deterministically patterned LM microfluidics, LMPA- and LM-embedded elastomer (LMEE) composites are statistically homogenous and exhibit effective bulk properties...
April 20, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28424755/rapid-low-cost-prototyping-of-transdermal-devices-for-personal-healthcare-monitoring
#17
Sanjiv Sharma, Anwer Saeed, Christopher Johnson, Nikolaj Gadegaard, Anthony Eg Cass
The next generation of devices for personal healthcare monitoring will comprise molecular sensors to monitor analytes of interest in the skin compartment. Transdermal devices based on microneedles offer an excellent opportunity to explore the dynamics of molecular markers in the interstitial fluid, however good acceptability of these next generation devices will require several technical problems associated with current commercially available wearable sensors to be overcome. These particularly include reliability, comfort and cost...
April 2017: Sensing and Bio-Sensing Research
https://www.readbyqxmd.com/read/28424026/walking-ability-following-hybrid-assistive-limb-treatment-for-a-patient-with-chronic-myelopathy-after-surgery-for-cervical-ossification-of-the-posterior-longitudinal-ligament
#18
Shigeki Kubota, Tetsuya Abe, Hideki Kadone, Kengo Fujii, Yukiyo Shimizu, Aiki Marushima, Tomoyuki Ueno, Hiroaki Kawamoto, Yasushi Hada, Akira Matsumura, Yoshiyuki Sankai, Masashi Yamazaki
CONTEXT: The hybrid assistive limb (HAL) (the wearable robot) can assist kinesis during voluntary control of hip and knee joint motion by detecting the wearer's bioelectric signals on the surface of their skin. The purpose of this study was to report on walking ability following the wearable robot treatment in a patient with chronic myelopathy after surgery for cervical ossification of the posterior longitudinal ligament (OPLL). FINDINGS: The patient was a 66-year-old woman with cervical OPLL who was able to ambulate independently with the aid of bilateral crutches...
April 20, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/28423421/efficacy-of-some-wearable-devices-compared-with-spray-on-insect-repellents-for-the-yellow-fever-mosquito-aedes-aegypti-l-diptera-culicidae
#19
Stacy D Rodriguez, Hae-Na Chung, Kristina K Gonzales, Julia Vulcan, Yiyi Li, Jorge A Ahumada, Hector M Romero, Mario De La Torre, Fangjun Shu, Immo A Hansen
The current Zika health crisis in the Americas has created an intense interest in mosquito control methods and products. Mosquito vectors of Zika are of the genus Aedes, mainly the yellow fever mosquito, Aedes aegypti. L. The use of repellents to alter mosquito host seeking behavior is an effective method for the prevention of mosquito-borne diseases. A large number of different spray-on repellents and wearable repellent devices are commercially available. The efficacies of many repellents are unknown. This study focuses on the efficacy of eleven different repellents in reducing the number of Ae...
January 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28422253/3d-printed-poly-vinylidene-fluoride-carbon-nanotube-composites-as-a-tunable-low-cost-chemical-vapour-sensing-platform
#20
Z C Kennedy, J F Christ, K A Evans, B W Arey, L E Sweet, M G Warner, R L Erikson, C A Barrett
We report the production of flexible, highly-conductive poly(vinylidene fluoride) (PVDF) and multi-walled carbon nanotube (MWCNT) composites as filament feedstock for 3D printing. This account further describes, for the first time, fused deposition modelling (FDM) derived 3D-printed objects with chemiresistive properties in response to volatile organic compounds. The typically prohibitive thermal expansion and die swell characteristics of PVDF were minimized by the presence of MWCNTs in the composites enabling straightforward processing and printing...
April 19, 2017: Nanoscale
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