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https://www.readbyqxmd.com/read/28812871/high-performance-porous-molybdenum-oxynitride-based-fiber-supercapacitors
#1
Dan Ruan, Rui Lin, Kui Jiang, Xiang Yu, Yaofeng Zhu, Yaqin Fu, Zilong Wang, He Yan, Wenjie Mai
Scalable manufacturing of flexible, fiber-shaped energy storage devices has enabled great technological advances in wearable and portable technology. Replacing inefficient oxides with inexpensive and high-performance oxynitrides with more favourable 3D structures is critical if the practical applications of these technologies are to be realised. Here we developed a facile and controllable approach for the synthesis of 3D porous micropillars of molybdenum oxynitride, which exhibit high conductivity, robust stability and excellent energy storage properties...
August 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28809786/octopus-a-design-methodology-for-motion-capture-wearables
#2
Javier Marin, Teresa Blanco, Jose J Marin
Human motion capture (MoCap) is widely recognised for its usefulness and application in different fields, such as health, sports, and leisure; therefore, its inclusion in current wearables (MoCap-wearables) is increasing, and it may be very useful in a context of intelligent objects interconnected with each other and to the cloud in the Internet of Things (IoT). However, capturing human movement adequately requires addressing difficult-to-satisfy requirements, which means that the applications that are possible with this technology are held back by a series of accessibility barriers, some technological and some regarding usability...
August 15, 2017: Sensors
https://www.readbyqxmd.com/read/28809713/a-survey-on-biofeedback-and-actuation-in-wireless-body-area-networks-wban
#3
Rui Li, Daniel T H Lai, WeeSit Lee
Wireless Body Area Networks (WBAN) has attained increasing popularity as the next generation framework of wearable technologies for human monitoring. Invasive or non-invasive wearable sensors designed in WBAN are worn to gather vital information. Biofeedback is a recent concept where collected data is used to generate actuation signals in WBANs. Applications can be seen in various areas such as sports (e.g. locomotor velocity) or medical (e.g. blood pressure measurement). However, since the body is closely regulated, the next generation WBAN technology must be smart enough to react to monitored data...
August 10, 2017: IEEE Reviews in Biomedical Engineering
https://www.readbyqxmd.com/read/28809183/helping-hands-using-augmented-reality-to-provide-remote-guidance-to-health-professionals
#4
Carey Mather, Tony Barnett, Vlasti Broucek, Annette Saunders, Darren Grattidge, Weidong Huang
Access to expert practitioners or geographic distance can compound the capacity for appropriate supervision of health professionals in the workplace. Guidance and support of clinicians and students to undertake new or infrequent procedures can be resource intensive. The Helping Hands remote augmented reality system is an innovation to support the development of, and oversee the acquisition of procedural skills through remote learning and teaching supervision while in clinical practice. Helping Hands is a wearable, portable, hands-free, low cost system comprised of two networked laptops, a head-mounted display worn by the recipient and a display screen used remotely by the instructor...
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28800736/using-computer-mobile-and-wearable-technology-enhanced-interventions-to-reduce-sedentary-behaviour-a-systematic-review-and-meta-analysis
#5
REVIEW
Aoife Stephenson, Suzanne M McDonough, Marie H Murphy, Chris D Nugent, Jacqueline L Mair
BACKGROUND: High levels of sedentary behaviour (SB) are associated with negative health consequences. Technology enhanced solutions such as mobile applications, activity monitors, prompting software, texts, emails and websites are being harnessed to reduce SB. The aim of this paper is to evaluate the effectiveness of such technology enhanced interventions aimed at reducing SB in healthy adults and to examine the behaviour change techniques (BCTs) used. METHODS: Five electronic databases were searched to identify randomised-controlled trials (RCTs), published up to June 2016...
August 11, 2017: International Journal of Behavioral Nutrition and Physical Activity
https://www.readbyqxmd.com/read/28798658/miniaturized-battery-free-wireless-systems-for-wearable-pulse-oximetry
#6
Jeonghyun Kim, Philipp Gutruf, Antonio M Chiarelli, Seung Yun Heo, Kyoungyeon Cho, Zhaoqian Xie, Anthony Banks, Seungyoung Han, Kyung-In Jang, Jung Woo Lee, Kyu-Tae Lee, Xue Feng, Yonggang Huang, Monica Fabiani, Gabriele Gratton, Ungyu Paik, John A Rogers
Development of unconventional technologies for wireless collection, storage and analysis of quantitative, clinically relevant information on physiological status is of growing interest. Soft, biocompatible systems are widely regarded as important because they facilitate mounting on external (e.g. skin) and internal (e.g. heart, brain) surfaces of the body. Ultra-miniaturized, lightweight and battery-free devices have the potential to establish complementary options in bio-integration, where chronic interfaces (i...
January 5, 2017: Advanced Functional Materials
https://www.readbyqxmd.com/read/28798200/wearable-physiological-monitoring-for-human-thermal-work-strain-optimization
#7
Mark J Buller, Alexander Pearson Welles, Karl E Friedl
Safe performance limits of soldiers and athletes have typically relied on predictive work-rest models of ambient conditions, average work intensity, and characteristics of the population. Bioengineering advances in noninvasive sensor technologies including miniaturization, reduced cost, power requirements, and comfort now make it possible to produce individual predictions of safe thermal-work limits. These precision medicine assessments depend on the development of thoughtful algorithms based on physics and physiology...
August 10, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28798198/wearable-ballistocardiogram-and-seismocardiogram-systems-for-health-and-performance
#8
Mozziyar Etemadi, Omer T Inan
Cardiovascular diseases (CVDs) are prevalent in the US and many forms of CVDs primarily affect the mechanical aspects of heart function. Wearable technologies for monitoring the mechanical health of the heart and vasculature could enable proactive management of CVDs through titration of care based on physiological status, as well as preventative wellness monitoring to help promote lifestyle choices that reduce the overall risk of developing CVDs. Additionally, such wearable technologies could be used to optimize human performance in austere environments...
August 10, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28783651/automatic-recognition-of-activities-of-daily-living-utilizing-insole-based-and-wrist-worn-wearable-sensors
#9
Nagaraj Hegde, Matthew Bries, Tracy Swibas, Edward Melanson, Edward Sazonov
Automatic recognition of activities of daily living (ADL) is an important component in understanding of energy balance, quality of life and other areas of health and well-being. In our previous work, we had proposed an insole based activity monitor - SmartStep, designed to be socially acceptable and comfortable. The goals of the current study were: first, validation of SmartStep in recognition of a broad set of ADL; second, comparison of the SmartStep to a wrist sensor and testing these in combination; third, evaluation of SmartStep accuracy in measuring wear non-compliance and a novel activity class (driving); fourth, performing the validation in free living against a well-studied criterion measure (ActivPAL, PAL Technologies); and fifth, quantitative evaluation of the perceived comfort of SmartStep...
August 1, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28783194/rapid-all-dry-microfabrication-of-three-dimensional-co3o4-pt-nanonetworks-for-high-performance-microsupercapacitors
#10
Xinyu Ma, Shuxuan Feng, Liang He, Mengyu Yan, Xiaocong Tian, Yanxi Li, Chunjuan Tang, Xufeng Hong, Liqiang Mai
On-chip electrochemical energy storage devices have attracted growing attention due to the decreasing size of electronic devices. Various approaches have been applied for constructing the microsupercapacitors. However, the microfabrication of high-performance microsupercapacitors by conventional and fully compatible semiconductor microfabrication technologies is still a critical challenge. Herein, unique three-dimensional (3D) Co3O4 nanonetwork microelectrodes formed by the interconnection of Co3O4 nanosheets are constructed by controllable physical vapor deposition combined with rapid thermal annealing...
August 7, 2017: Nanoscale
https://www.readbyqxmd.com/read/28782846/defect-engineering-toward-atomic-co-nx-c-in-hierarchical-graphene-for-rechargeable-flexible-solid-zn-air-batteries
#11
Cheng Tang, Bin Wang, Hao-Fan Wang, Qiang Zhang
Rechargeable flexible solid Zn-air battery, with a high theoretical energy density of 1086 Wh kg(-1) , is among the most attractive energy technologies for future flexible and wearable electronics; nevertheless, the practical application is greatly hindered by the sluggish oxygen reduction reaction/oxygen evolution reaction (ORR/OER) kinetics on the air electrode. Precious metal-free functionalized carbon materials are widely demonstrated as the most promising candidates, while it still lacks effective synthetic methodology to controllably synthesize carbocatalysts with targeted active sites...
August 7, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28773037/bias-stress-and-temperature-impact-on-ingazno-tfts-and-circuits
#12
Jorge Martins, Pydi Bahubalindruni, Ana Rovisco, Asal Kiazadeh, Rodrigo Martins, Elvira Fortunato, Pedro Barquinha
This paper focuses on the analysis of InGaZnO thin-film transistors (TFTs) and circuits under the influence of different temperatures and bias stress, shedding light into their robustness when used in real-world applications. For temperature-dependent measurements, a temperature range of 15 to 85 °C was considered. In case of bias stress, both gate and drain bias were applied for 60 min. Though isolated transistors show a variation of drain current as high as 56% and 172% during bias voltage and temperature stress, the employed circuits were able to counteract it...
June 21, 2017: Materials
https://www.readbyqxmd.com/read/28767336/advances-in-scientific-possibilities-offered-by-real-time-monitoring-technology
#13
Evan M Kleiman, Matthew K Nock
There has been a marked increase in research aimed at studying dynamic (e.g., day-to-day, moment-to-moment) changes in mental disorders and related behavior problems. Indeed, the number of scientific papers published that focus on real-time monitoring has been nearly doubling every five years for the past several decades. These methods allow for a more fine-grained description of phenomena of interest as well as for real-world tests of theoretical models of human behavior. Here we comment on the recent study by van Winkel and colleagues (this issue)as an excellent example of the use of real-time monitoring methods to better understand mental disorders...
2017: Psychiatry
https://www.readbyqxmd.com/read/28767091/heart-rate-detection-using-microsoft-kinect-validation-and-comparison-to-wearable-devices
#14
Ennio Gambi, Angela Agostinelli, Alberto Belli, Laura Burattini, Enea Cippitelli, Sandro Fioretti, Paola Pierleoni, Manola Ricciuti, Agnese Sbrollini, Susanna Spinsante
Contactless detection is one of the new frontiers of technological innovation in the field of healthcare, enabling unobtrusive measurements of biomedical parameters. Compared to conventional methods for Heart Rate (HR) detection that employ expensive and/or uncomfortable devices, such as the Electrocardiograph (ECG) or pulse oximeter, contactless HR detection offers fast and continuous monitoring of heart activities and provides support for clinical analysis without the need for the user to wear a device. This paper presents a validation study for a contactless HR estimation method exploiting RGB (Red, Green, Blue) data from a Microsoft Kinect v2 device...
August 2, 2017: Sensors
https://www.readbyqxmd.com/read/28758899/flexible-transparent-and-high-performance-gas-sensor-based-on-layer-materials-for-wearable-technology
#15
Zhaoqiang Zheng, J D Yao, Bing Wang, G W Guo Wei Yang
Gas sensors play a vital role among a wide range of practical applications. Recently, propelled by the development of layered materials, gas sensors have gained much progress. However, the high operation temperature has restricted their further application. Herein, via a facile pulsed laser deposition (PLD) method, we demonstrate a flexible, transparent and high-performance gas sensor made of highly-crystalline indium selenide (In2Se3) film. Under UV-Vis-NIR light or even solar energy activation, the constructed gas sensors exhibit superior properties for detecting acetylene (C2H2) gas at room temperature...
July 31, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28758264/supercapacitive-iontronic-nanofabric-sensing
#16
Ruya Li, Yang Si, Zijie Zhu, Yaojun Guo, Yingjie Zhang, Ning Pan, Gang Sun, Tingrui Pan
The study of wearable devices has become a popular research topic recently, where high-sensitivity, noise proof sensing mechanisms with long-term wearability play critical roles in a real-world implementation, while the existing mechanical sensing technologies (i.e., resistive, capacitive, or piezoelectric) have yet offered a satisfactory solution to address them all. Here, we successfully introduced a flexible supercapacitive sensing modality to all-fabric materials for wearable pressure and force sensing using an elastic ionic-electronic interface...
July 31, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28756432/talking-to-toddlers-drawing-on-mothers-perceptions-of-using-wearable-and-mobile-technology-in-the-home
#17
Dawn Choo, Shani Dettman, Richard Dowell, Robert Cowan
BACKGROUND: Mother-child interactions often give rise to opportunities for early language learning in the context of everyday life. Persuasive technology has the potential to influence maternal language behaviours in the home and promote mothers' active engagement in the development of their children's communication skills. AIM: This paper explored maternal perceptions regarding the use of a language tracking wearable (Language Environment Analysis; LENA) device and a parent education smartphone application in an 8-week trial with their young children...
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28754916/self-powered-pressure-sensor-with-fully-encapsulated-3d-printed-wavy-substrate-and-highly-aligned-piezoelectric-fibers-array
#18
Yiin Kuen Fuh, Bo Sheng Wang, Chen-Yu Tsai
Near-field electrospinning (NFES) is capable of precisely deposit one-dimensional (1D) or two-dimensional (2D) highly aligned micro/nano fibers (NMFs) by electrically discharged a polymer solution. In this paper, a new integration of three-dimensional (3D) architectures of NFES electrospun polyvinylidene fluoride (PVDF) NMFs with the 3D printed topologically tailored substrate are demonstrated in a direct-write and in-situ poled manner, called wavy- substrate self-powered sensors (WSS). The fabrication steps are composed of the additive manufacture of 3D printed flexible and sinusoidal wavy substrate, metallization and NFES electrospun fibers in the 3D topology...
July 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28751371/wearable-knee-health-system-employing-novel-physiological-biomarkers
#19
Omer T Inan, Daniel C Whittingslow, Caitlin N Teague, Sinan Hersek, Maziyar Baran Pouyan, Mindy Millard-Stafford, Geza F Kogler, Michael N Sawka
Knee injuries and chronic disorders, such as arthritis, affect millions of Americans leading to missed workdays and reduced quality of life. Currently, after an initial diagnosis, there are few quantitative technologies available to provide sensitive sub-clinical feedback to patients regarding improvements or setbacks to their knee health status; instead, most assessments are qualitative, relying on patient-reported symptoms, performance during functional tests, and physical examinations. Recent advances have been made with wearable technologies for assessing the health status of the knee (and potentially other joints) with the goal of facilitating personalized rehabilitation of injuries and care for chronic conditions...
July 27, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28751369/wearable-technology-for-compensatory-reserve-to-sense-hypovolemia
#20
Victor A Convertino, Michael N Sawka
Traditional monitoring technologies fail to provide accurate or early indications of hypovolemia-mediated extremis because physiological systems (as measured by vital signs) effectively compensate until circulatory failure occurs. Hypovolemia is the most life-threatening physiological condition associated with circulatory shock in hemorrhage or sepsis, and it impairs one's ability to sustain physical exertion during heat stress. This review focuses on the physiology underlying the development of a novel non-invasive wearable technology that allows for real-time evaluation of the cardiovascular system's ability to compensate to hypovolemia, or its compensatory reserve, which provides an individualized estimate of impending circulatory collapse...
July 27, 2017: Journal of Applied Physiology
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