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https://www.readbyqxmd.com/read/29786659/deep-learning-to-predict-falls-in-older-adults-based-on-daily-life-trunk-accelerometry
#1
REVIEW
Ahmed Nait Aicha, Gwenn Englebienne, Kimberley S van Schooten, Mirjam Pijnappels, Ben Kröse
Early detection of high fall risk is an essential component of fall prevention in older adults. Wearable sensors can provide valuable insight into daily-life activities; biomechanical features extracted from such inertial data have been shown to be of added value for the assessment of fall risk. Body-worn sensors such as accelerometers can provide valuable insight into fall risk. Currently, biomechanical features derived from accelerometer data are used for the assessment of fall risk. Here, we studied whether deep learning methods from machine learning are suited to automatically derive features from raw accelerometer data that assess fall risk...
May 22, 2018: Sensors
https://www.readbyqxmd.com/read/29785854/high-k-gate-dielectrics-for-emerging-flexible-and-stretchable-electronics
#2
Binghao Wang, Wei Huang, Lifeng Chi, Mohammed Al-Hashimi, Tobin J Marks, Antonio Facchetti
Recent advances in flexible and stretchable electronics (FSE), a technology diverging from the conventional rigid silicon technology, have stimulated fundamental scientific and technological research efforts. FSE aims at enabling disruptive applications such as flexible displays, wearable sensors, printed RFID tags on packaging, electronics on skin/organs, and Internet-of-things as well as possibly reducing the cost of electronic device fabrication. Thus, the key materials components of electronics, the semiconductor, the dielectric, and the conductor as well as the passive (substrate, planarization, passivation, and encapsulation layers) must exhibit electrical performance and mechanical properties compatible with FSE components and products...
May 22, 2018: Chemical Reviews
https://www.readbyqxmd.com/read/29784995/an-autonomously-electrically-self-healing-liquid-metal-elastomer-composite-for-robust-soft-matter-robotics-and-electronics
#3
Eric J Markvicka, Michael D Bartlett, Xiaonan Huang, Carmel Majidi
Large-area stretchable electronics are critical for progress in wearable computing, soft robotics and inflatable structures. Recent efforts have focused on engineering electronics from soft materials-elastomers, polyelectrolyte gels and liquid metal. While these materials enable elastic compliance and deformability, they are vulnerable to tearing, puncture and other mechanical damage modes that cause electrical failure. Here, we introduce a material architecture for soft and highly deformable circuit interconnects that are electromechanically stable under typical loading conditions, while exhibiting uncompromising resilience to mechanical damage...
May 21, 2018: Nature Materials
https://www.readbyqxmd.com/read/29783897/continuous-glucose-monitoring-current-use-in-diabetes-management-and-possible-future-applications
#4
Martina Vettoretti, Giacomo Cappon, Giada Acciaroli, Andrea Facchinetti, Giovanni Sparacino
The recent announcement of the production of new low-cost continuous glucose monitoring (CGM) sensors, the approval of marketed CGM sensors for making treatment decisions, and new reimbursement criteria have the potential to revolutionize CGM use. After briefly summarizing current CGM applications, we discuss how, in our opinion, these changes are expected to extend CGM utilization beyond diabetes patients, for example, to subjects with prediabetes or even healthy individuals. We also elaborate on how the integration of CGM data with other relevant information, for example, health records and other medical device/wearable sensor data, will contribute to creating a digital data ecosystem that will improve our understanding of the etiology and complications of diabetes and will facilitate the development of data analytics for personalized diabetes management and prevention...
May 1, 2018: Journal of Diabetes Science and Technology
https://www.readbyqxmd.com/read/29783763/integrated-framework-of-load-monitoring-by-a-combination-of-smartphone-applications-wearables-and-point-of-care-testing-provides-feedback-that-allows-individual-responsive-adjustments-to-activities-of-daily-living
#5
Peter Düking, Silvia Achtzehn, Hans-Christer Holmberg, Billy Sperlich
Athletes schedule their training and recovery in periods, often utilizing a pre-defined strategy. To avoid underperformance and/or compromised health, the external load during training should take into account the individual's physiological and perceptual responses. No single variable provides an adequate basis for planning, but continuous monitoring of a combination of several indicators of internal and external load during training, recovery and off-training as well may allow individual responsive adjustments of a training program in an effective manner...
May 19, 2018: Sensors
https://www.readbyqxmd.com/read/29783659/feature-extraction-and-selection-for-myoelectric-control-based-on-wearable-emg-sensors
#6
Angkoon Phinyomark, Rami N Khushaba, Erik Scheme
Specialized myoelectric sensors have been used in prosthetics for decades, but, with recent advancements in wearable sensors, wireless communication and embedded technologies, wearable electromyographic (EMG) armbands are now commercially available for the general public. Due to physical, processing, and cost constraints, however, these armbands typically sample EMG signals at a lower frequency (e.g., 200 Hz for the Myo armband) than their clinical counterparts. It remains unclear whether existing EMG feature extraction methods, which largely evolved based on EMG signals sampled at 1000 Hz or above, are still effective for use with these emerging lower-bandwidth systems...
May 18, 2018: Sensors
https://www.readbyqxmd.com/read/29783647/type-and-location-of-wearable-sensors-for-monitoring-falls-during-static-and-dynamic-tasks-in-healthy-elderly-a-review
#7
REVIEW
Rosaria Rucco, Antonietta Sorriso, Marianna Liparoti, Giampaolo Ferraioli, Pierpaolo Sorrentino, Michele Ambrosanio, Fabio Baselice
In recent years, the meaning of successful living has moved from extending lifetime to improving the quality of aging, mainly in terms of high cognitive and physical functioning together with avoiding diseases. In healthy elderly, falls represent an alarming accident both in terms of number of events and the consequent decrease in the quality of life. Stability control is a key approach for studying the genesis of falls, for detecting the event and trying to develop methodologies to prevent it. Wearable sensors have proved to be very useful in monitoring and analyzing the stability of subjects...
May 18, 2018: Sensors
https://www.readbyqxmd.com/read/29782666/liquid-crystals-with-interfacial-ordering-that-enhances-responsiveness-to-chemical-targets
#8
Karthik Nayani, Prabin Rai, Nanqi Bao, Huaizhe Yu, Manos Mavrikakis, Robert J Twieg, Nicholas L Abbott
The development of stimuli-responsive materials suitable for use in wearable sensors is a key unresolved challenge. Liquid crystals (LCs) are particularly promising, as they do not require power, are light-weight, and can be tuned to respond to a range of targeted chemical stimuli. Here, an advance is reported in the design of LCs for chemical sensors with the discovery of LCs that assume parallel orientations at free surfaces and yet retain their chemoresponsiveness. The resulting LC-based sensors are more sensitive and exhibit faster responses than previous LC sensor designs...
May 21, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29781448/flexible-self-powered-piezo-supercapacitor-system-for-wearable-electronics
#9
Evgenia Gilshteyn, Daler Amanbaev, Maxim Silibin, Artem Sysa, Vladislav Kondrashov, Anton Anisimov, Tanja Kallio, Albert Nasibulin
The integration of the energy harvesting and energy storage in a single device both enables the conversion of the ambient energy into electricity and provides a sustainable power source for various electronic devices and systems. On the other hand, mechanical flexibility coupled with optical transparency of the energy storage devices is required for many applications, ranging from self-powered rolled-up displays to wearable optoelectronic devices. We integrate a piezoelectric poly(vinylidene-trifluoroethylene) film into a flexible supercapacitor system to harvest and store the energy...
May 21, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29778830/wearable-camera-derived-microenvironments-in-relation-to-personal-exposure-to-pm-2-5
#10
Maëlle Salmon, Carles Milà, Santhi Bhogadi, Srivalli Addanki, Pavitra Madhira, Niharika Muddepaka, Amaravathi Mora, Margaux Sanchez, Sanjay Kinra, V Sreekanth, Aiden Doherty, Julian D Marshall, Cathryn Tonne
Data regarding which microenvironments drive exposure to air pollution in low and middle income countries are scarce. Our objective was to identify sources of time-resolved personal PM2.5 exposure in peri-urban India using wearable camera-derived microenvironmental information. We conducted a panel study with up to 6 repeated non-consecutive 24 h measurements on 45 participants (186 participant-days). Camera images were manually annotated to derive visual concepts indicative of microenvironments and activities...
May 17, 2018: Environment International
https://www.readbyqxmd.com/read/29776773/circadian-rhythms-and-mental-health-wearable-sensing-at-scale
#11
Aiden Doherty
No abstract text is available yet for this article.
May 15, 2018: Lancet Psychiatry
https://www.readbyqxmd.com/read/29775281/highly-stretchable-waterproof-fiber-asymmetric-supercapacitors-in-an-integrated-structure
#12
Kai Guo, Xianfu Wang, Lintong Hu, Tianyou Zhai, Huiqiao Li, Neng Yu
Fiber supercapacitors have attracted tremendous attention as promising power source candidates for next generation of wearable electronics, which are flexible, stretchable, and washable. Although asymmetric fiber supercapacitors with a high energy density have been achieved, their stretchability is no more than 200%, and they still face mechanical instability and unreliable waterproof structure. This work develops a highly integrated structure for waterproof, highly stretchable and asymmetric fiber-shaped supercapacitor, which is assembled by integrating a helix-shaped asymmetric fiber supercapacitor into a bifunctional polymer...
May 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29775276/fully-printed-organic-inorganic-nanocomposites-for-flexible-thermoelectric-applications
#13
Canlin Ou, Abhijeet Laxman Sangle, Anuja Datta, Qingshen Jing, Tommaso Busolo, Thomas Chalklen, Vijay Narayan, Sohini Kar-Narayan
Thermoelectric materials, capable of interconverting heat and electricity, are attractive for applications in thermal energy harvesting as a means to power wireless sensors, wearable devices and portable electronics. However, traditional inorganic thermoelectric materials pose significant challenges due to high cost, toxicity, scarcity, as well as brittleness particularly when it comes to applications requiring flexibility. Here, we investigate organic-inorganic nanocomposites that have been developed from bespoke inks which are printed via an aerosol jet printing method onto flexible substrates...
May 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29774921/a-flexible-pressure-sensor-based-on-rgo-polyaniline-wrapped-sponge-with-tunable-sensitivity-for-human-motion-detection
#14
Gang Ge, Yichen Cai, Qiuchun Dong, Yizhou Zhang, Jinjun Shao, Wei Huang, Xiaochen Dong
High-performance stretchable and wearable electronic skins (E-skins) with high sensitivity and a large sensing range are urgently required with the rapid development of the Internet of things and artificial intelligence. Herein, a reduced graphene oxide (rGO)/polyaniline wrapped sponge is prepared via rGO coating and the in situ synthesis of polyaniline nanowires (PANI NWs) on the backbones of sponge for the fabrication of pressure sensors. From the as-prepared flexible sensor, tunable sensitivity (0.042 to 0...
May 18, 2018: Nanoscale
https://www.readbyqxmd.com/read/29774612/elastic-fiber-supercapacitors-for-wearable-energy-storage
#15
REVIEW
Si Qin, Shayan Seyedin, Jizhen Zhang, Zhiyu Wang, Fangli Yang, Yuqing Liu, Jun Chen, Joselito M Razal
The development of wearable devices such as smart watches, intelligent garments, and wearable health-monitoring devices calls for suitable energy storage devices which have matching mechanical properties and can provide sufficient power for a reasonable duration. Stretchable fiber-based supercapacitors are emerging as a promising candidates for this purpose because they are lightweight, flexible, have high energy and power density, and the potential for easy integration into traditional textile processes. An important characteristic that is oftentimes ignored is stretchability-fiber supercapacitors should be able to accommodate large elongation during use, endure a range of bending motions, and then revert to its original form without compromising electrical and electrochemical performance...
May 17, 2018: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/29773529/development-of-a-just-in-time-adaptive-mhealth-intervention-for-insomnia-usability-study
#16
I Wayan Pulantara, Bambang Parmanto, Anne Germain
BACKGROUND: Healthy sleep is a fundamental component of physical and brain health. Insomnia, however, is a prevalent sleep disorder that compromises functioning, productivity, and health. Therefore, developing efficient treatment delivery methods for insomnia can have significant societal and personal health impacts. Cognitive behavioral therapy for insomnia (CBTI) is the recommended first-line treatment of insomnia but access is currently limited for patients, since treatment must occur in specialty sleep clinics, which suffer from an insufficient number of trained clinicians...
May 17, 2018: JMIR Human Factors
https://www.readbyqxmd.com/read/29773349/robot-assisted-training-using-hybrid-assistive-limb%C3%A2-for-cerebral-palsy
#17
Mayumi Matsuda, Nobuaki Iwasaki, Yuki Mataki, Hirotaka Mutsuzaki, Kenichi Yoshikawa, Kazushi Takahashi, Keiko Enomoto, Kumiko Sano, Aoi Kubota, Tomohiro Nakayama, Junko Nakayama, Haruka Ohguro, Masafumi Mizukami, Kazuhide Tomita
PURPOSE: The Hybrid Assistive Limb® (HAL®, CYBERDYNE) is a wearable robot that provides assistance to a patient while they are walking, standing, and performing leg movements based on the wearer's intended movement. The effect of robot-assisted training using HAL® for cerebral palsy (CP) is unknown. Therefore, we assessed the effect of robot-assisted training using HAL® on patients with CP, and compared walking and gross motor abilities between pre-intervention and post-intervention...
May 14, 2018: Brain & Development
https://www.readbyqxmd.com/read/29772818/integrated-method-for-personal-thermal-comfort-assessment-and-optimization-through-users-feedback-iot-and-machine-learning-a-case-study-%C3%A2
#18
Francesco Salamone, Lorenzo Belussi, Cristian Currò, Ludovico Danza, Matteo Ghellere, Giulia Guazzi, Bruno Lenzi, Valentino Megale, Italo Meroni
Thermal comfort has become a topic issue in building performance assessment as well as energy efficiency. Three methods are mainly recognized for its assessment. Two of them based on standardized methodologies, face the problem by considering the indoor environment in steady-state conditions (PMV and PPD) and users as active subjects whose thermal perception is influenced by outdoor climatic conditions (adaptive approach). The latter method is the starting point to investigate thermal comfort from an overall perspective by considering endogenous variables besides the traditional physical and environmental ones...
May 17, 2018: Sensors
https://www.readbyqxmd.com/read/29772779/sober-mcs-sociability-oriented-and-battery-efficient-recruitment-for-mobile-crowd-sensing
#19
Fazel Anjomshoa, Burak Kantarci
The Internet of Things (IoT) concept is aiming at being an integral part of the next generation networking services by introducing pervasiveness and ubiquitous interconnectivity of uniquely-identifiable objects. The massive availability of personalized smart devices such as smartphones and wearables enable their penetration into the IoT ecosystem with their built-in sensors, particularly in Mobile Crowd-Sensing (MCS) campaigns. The MCS systems achieve the objectives of the large-scale non-dedicated sensing concept in the IoT if a sufficient number of participants are engaged to the collaborative data acquisition process...
May 17, 2018: Sensors
https://www.readbyqxmd.com/read/29771494/screen-printed-washable-electronic-textiles-as-self-powered-touch-gesture-tribo-sensor-for-intelligent-human-machine-interaction
#20
Ran Cao, Xianjie Pu, Xinyu Du, Wei Yang, Jiaona Wang, Hengyu Guo, Shuyu Zhao, Zuqing Yuan, Chi Zhang, Congju Li, Zhong Lin Wang
Electronic textile (E-textile) with designable electric circuit and multi-functionalities holds great application prospect for future wearable electronics. However, most of the E-textiles still have critical challenges, including air permeability, satisfactory washability and massive fabrication. In this work, we fabricate a washable E-textile that addresses all of the concerns and show its application as a self-powered triboelectric gesture textile for intelligent human-machine interface. Utilizing conductive carbon nanotubes (CNTs) and screen-printing technology, this kind of E-textile embraces high conductivity (0...
May 17, 2018: ACS Nano
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