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https://www.readbyqxmd.com/read/28719739/graphene-electronic-tattoo-sensors
#1
Shideh Kabiri Ameri, Rebecca Ho, Hongwoo Jang, Li Tao, Youhua Wang, Liu Wang, David M Schnyer, Deji Akinwande, Nanshu Lu
Tattoo-like epidermal sensors are an emerging class of truly wearable electronics owing to their thinness and softness. While most of them are based on thin metal films, silicon membrane, or nanoparticle-based printable inks, we report a sub-micron thick, multimodal electronic tattoo sensors that are made of graphene. The graphene electronic tattoo (GET) is designed with filamentary serpentines and fabricated by a cost- and time-effective "wet transfer, dry patterning" method. It has a total thickness of 463 ± 30 nm, an optical transparency of ~85%, and a stretchability of more than 40%...
July 18, 2017: ACS Nano
https://www.readbyqxmd.com/read/28714884/design-and-implementation-of-a-smart-home-system-using-multisensor-data-fusion-technology
#2
Yu-Liang Hsu, Po-Huan Chou, Hsing-Cheng Chang, Shyan-Lung Lin, Shih-Chin Yang, Heng-Yi Su, Chih-Chien Chang, Yuan-Sheng Cheng, Yu-Chen Kuo
This paper aims to develop a multisensor data fusion technology-based smart home system by integrating wearable intelligent technology, artificial intelligence, and sensor fusion technology. We have developed the following three systems to create an intelligent smart home environment: (1) a wearable motion sensing device to be placed on residents' wrists and its corresponding 3D gesture recognition algorithm to implement a convenient automated household appliance control system; (2) a wearable motion sensing device mounted on a resident's feet and its indoor positioning algorithm to realize an effective indoor pedestrian navigation system for smart energy management; (3) a multisensor circuit module and an intelligent fire detection and alarm algorithm to realize a home safety and fire detection system...
July 15, 2017: Sensors
https://www.readbyqxmd.com/read/28714239/self-powered-real-time-arterial-pulse-monitoring-using-ultrathin-epidermal-piezoelectric-sensors
#3
Dae Yong Park, Daniel J Joe, Dong Hyun Kim, Hyewon Park, Jae Hyun Han, Chang Kyu Jeong, Hyelim Park, Jung Gyu Park, Boyoung Joung, Keon Jae Lee
Continuous monitoring of an arterial pulse using a pressure sensor attached on the epidermis is an important technology for detecting the early onset of cardiovascular disease and assessing personal health status. Conventional pulse sensors have the capability of detecting human biosignals, but have significant drawbacks of power consumption issues that limit sustainable operation of wearable medical devices. Here, a self-powered piezoelectric pulse sensor is demonstrated to enable in vivo measurement of radial/carotid pulse signals in near-surface arteries...
July 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28714112/wearables-in-epilepsy-and-parkinson-s-disease-a-focus-group-study
#4
A Ozanne, D Johansson, U Hällgren Graneheim, K Malmgren, F Bergquist, M Alt Murphy
OBJECTIVES: Wearable sensors that measure movement and physiological variables are attractive for clinical evaluation of neurological diseases such as epilepsy and Parkinson's disease (PD). The aim of this study was to explore perceptions regarding the use of wearable technology in disease monitoring and management as reported by individuals with epilepsy and Parkinson's disease as well as health professionals working with these patient groups. MATERIALS AND METHODS: Six patient groups (n=25) and two groups with health professionals (n=15) participated in this qualitative, descriptive study with focus group interviews...
July 16, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28704963/challenges-in-wireless-system-integration-as-enablers-for-indoor-context-aware-environments
#5
Peio López-Iturri, Erik Aguirre, Leyre Azpilicueta, José Javier Astrain, Jesús Villandangos, Francisco Falcone
The advent of fully interactive environments within Smart Cities and Smart Regions requires the use of multiple wireless systems. In the case of user-device interaction, which finds multiple applications such as Ambient Assisted Living, Intelligent Transportation Systems or Smart Grids, among others, large amount of transceivers are employed in order to achieve anytime, anyplace and any device connectivity. The resulting combination of heterogeneous wireless network exhibits fundamental limitations derived from Coverage/Capacity relations, as a function of required Quality of Service parameters, required bit rate, energy restrictions and adaptive modulation and coding schemes...
July 12, 2017: Sensors
https://www.readbyqxmd.com/read/28700603/the-language-of-glove-wireless-gesture-decoder-with-low-power-and-stretchable-hybrid-electronics
#6
Timothy F O'Connor, Matthew E Fach, Rachel Miller, Samuel E Root, Patrick P Mercier, Darren J Lipomi
This communication describes a glove capable of wirelessly translating the American Sign Language (ASL) alphabet into text displayable on a computer or smartphone. The key components of the device are strain sensors comprising a piezoresistive composite of carbon particles embedded in a fluoroelastomer. These sensors are integrated with a wearable electronic module consisting of digitizers, a microcontroller, and a Bluetooth radio. Finite-element analysis predicts a peak strain on the sensors of 5% when the knuckles are fully bent...
2017: PloS One
https://www.readbyqxmd.com/read/28698169/effectiveness-of-digital-medicines-to-improve-clinical-outcomes-in-patients-with-uncontrolled-hypertension-and-type-2-diabetes-prospective-open-label-cluster-randomized-pilot-clinical-trial
#7
Juan Frias, Naunihal Virdi, Praveen Raja, Yoona Kim, George Savage, Lars Osterberg
BACKGROUND: Hypertension and type 2 diabetes mellitus are major modifiable risk factors for cardiac, cerebrovascular, and kidney diseases. Reasons for poor disease control include nonadherence, lack of patient engagement, and therapeutic inertia. OBJECTIVE: The aim of this study was to assess the impact on clinic-measured blood pressure (BP) and glycated hemoglobin (HbA1c) using a digital medicine offering (DMO) that measures medication ingestion adherence, physical activity, and rest using digital medicines (medication taken with ingestible sensor), wearable sensor patches, and a mobile device app...
July 11, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28696658/ultrasensitive-wearable-soft-strain-sensors-of-conductive-self-healing-and-elastic-hydrogels-with-synergistic-soft-and-hard-hybrid-networks
#8
Yan-Jun Liu, Wen-Tao Cao, Ming-Guo Ma, Pengbo Wan
Robust, stretchable and strain-sensitive hydrogels have recently attracted immense research interest due to their potential application in wearable strain sensors. The integration of the synergistic characteristics of decent mechanical properties, reliable self-healing capability, and high sensing sensitivity for fabricating conductive, elastic, self-healing, and strain-sensitive hydrogels is still a great challenge. Inspired by the mechanically excellent and self-healing biological soft tissues with hierarchical network structures, herein, functional network hydrogels are fabricated by the interconnection between a "soft" homogeneous polymer network and a "hard" dynamic ferric (Fe3+) cross-linked cellulose nanocrystals (CNCs-Fe(3+)) network...
July 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28695440/an-ir-sensor-based-smart-system-to-approximate-core-body-temperature
#9
Partha Pratim Ray
Herein demonstrated experiment studies two methods, namely convection and body resistance, to approximate human core body temperature. The proposed system is highly energy efficient that consumes only 165 mW power and runs on 5 VDC source. The implemented solution employs an IR thermographic sensor of industry grade along with AT Mega 328 breakout board. Ordinarily, the IR sensor is placed 1.5-30 cm away from human forehead (i.e., non-invasive) and measured the raw data in terms of skin and ambient temperature which is then converted using appropriate approximation formula to find out core body temperature...
August 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28694528/balancing-hole-and-electron-conduction-in-ambipolar-split-gate-thin-film-transistors
#10
Hocheon Yoo, Matteo Ghittorelli, Dong-Kyu Lee, Edsger C P Smits, Gerwin H Gelinck, Hyungju Ahn, Han-Koo Lee, Fabrizio Torricelli, Jae-Joon Kim
Complementary organic electronics is a key enabling technology for the development of new applications including smart ubiquitous sensors, wearable electronics, and healthcare devices. High-performance, high-functionality and reliable complementary circuits require n- and p-type thin-film transistors with balanced characteristics. Recent advancements in ambipolar organic transistors in terms of semiconductor and device engineering demonstrate the great potential of this route but, unfortunately, the actual development of ambipolar organic complementary electronics is currently hampered by the uneven electron (n-type) and hole (p-type) conduction in ambipolar organic transistors...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28694467/synthesis-of-nanobelt-like-1-dimensional-silver-nanocarbon-hybrid-materials-for-flexible-and-wearable-electroncs
#11
Joong Tark Han, Jeong In Jang, Joon Young Cho, Jun Yeon Hwang, Jong Seok Woo, Hee Jin Jeong, Seung Yol Jeong, Seon Hee Seo, Geon-Woong Lee
Most synthetic processes of metallic nanostructures were assisted by organic/inorganic or polymeric materials to control their shapes to one-dimension or two-dimension. However, these additives have to be removed after synthesis of metal nanostructures for applications. Here we report a straightforward method for the low-temperature and additive-free synthesis of nanobelt-like silver nanostructures templated by nanocarbon (NC) materials via bio-inspired shape control by introducing supramolecular 2-ureido-4[1H]pyrimidinone (UPy) groups into the NC surface...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28692957/passive-wearable-skin-patch-sensor-measures-limb-hemodynamics-based-on-electromagnetic-resonance
#12
Kim Cluff, Ryan A Becker, Balakumar Jayakumar, Kiyun Han, Ernie Condon, Kenneth Dudley, George Szatkowski, Iraklis I Pipinos, Ryan Z Amick, Jeremy Patterson
OBJECTIVE: The objectives of this study were to design and develop an open circuit electromagnetic resonant skin patch sensor, characterize the fluid volume and resonant frequency relationship and investigate the sensor's ability to measure limb hemodynamics and pulse volume waveform features. METHODS: The skin patch was designed from an open circuit electromagnetic resonant sensor comprised of a single baseline trace of copper configured into a square planar spiral which had a self-resonating response when excited by an external radio frequency (RF) sweep...
July 4, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28691124/measuring-changes-in-gait-and-vehicle-transfer-ability-during-inpatient-rehabilitation-with-wearable-inertial-sensors
#13
Vladimir Borisov, Gina Sprint, Diane J Cook, Douglas L Weeks
Restoration of functional independence in gait and vehicle transfer ability is a common goal of inpatient rehabilitation. Currently, ambulation changes tend to be subjectively assessed. To investigate more precise objective assessment of progress in inpatient rehabilitation, we quantitatively assessed gait and transfer performances over the course of rehabilitation with wearable inertial sensors for 20 patients receiving inpatient rehabilitation services. Secondarily, we asked physical therapists to provide feedback about the clinical utility of metrics derived from the sensors...
March 2017: Proc IEEE Int Conf Pervasive Comput Commun Workshops
https://www.readbyqxmd.com/read/28689861/the-relationship-between-physical-activity-and-post-operative-length-of-hospital-stay-a-systematic-review
#14
REVIEW
Aliza Abeles, Richard M Kwasnicki, Chris Pettengell, Jamie Murphy, Ara Darzi
BACKGROUND: Recovery from surgery has traditionally been measured using specific outcome measures, such as length of hospital stay. However, advances in technology have enabled the measurement of continuous, objective physical activity data in the perioperative period. The aim of this systematic review was to determine the relationship between length of hospital stay and physical activity data for patients undergoing surgery. METHODS: A systematic search of EMBASE, Medline and the Cochrane Library, from inception until January 2017, was performed to identify all study designs that evaluated physical activity after surgery...
July 6, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28687953/the-effect-of-treadmill-and-overground-walking-on-preferred-walking-speed-and-gait-kinematics-in-healthy-physically-active-older-adults
#15
Davide Malatesta, Mosè Canepa, Aitor Menendez Fernandez
PURPOSE: Preferred walking speed (PWS) represents a performance measure of mobility in older individuals. PWS is usually assessed during overground (via a 2-40 m walkway) or treadmill walking in older adults. The aim of this study was to compare the effect of treadmill and overground walking on preferred walking speed, spatiotemporal parameters and foot kinematics in healthy, physically active older and young adults after adequate treadmill familiarization. METHODS: PWS and spatiotemporal parameters were assessed during overground (PWSO) and treadmill (PWST) walking using two wearable inertial sensor systems and were compared between 25 older (72...
July 7, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28687533/mobile-health-technology-using-a-wearable-sensorband-for-female-college-students-with-problem-drinking-an-acceptability-and-feasibility-study
#16
Noelle Regina Leonard, Michelle Silverman, Dawa Phuti Sherpa, Madeline A Naegle, Hyorim Kim, Donna L Coffman, Marcy Ferdschneider
BACKGROUND: An increasing number of mobile app interventions have been developed for problem drinking among college students; however, few studies have examined the integration of a mobile app with continuous physiological monitoring and alerting of affective states related to drinking behaviors. OBJECTIVE: The aim of this paper was to evaluate the acceptability and feasibility of Mind the Moment (MtM), a theoretically based intervention for female college students with problem drinking that combines brief, in-person counseling with ecological momentary intervention (EMI) on a mobile app integrated with a wearable sensorband...
July 7, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28685468/tissue-integrating-oxygen-sensors-continuous-tracking-of-tissue-hypoxia
#17
Natalie A Wisniewski, Scott P Nichols, Soya J Gamsey, Steve Pullins, Kit Y Au-Yeung, Bruce Klitzman, Kristen L Helton
We describe a simple method of tracking oxygen in real-time with injectable, tissue-integrating microsensors. The sensors are small (500 μm × 500 μm × 5 mm), soft, flexible, tissue-like, biocompatible hydrogel s that have been shown to overcome the foreign body response for long-term sensing. The sensors are engineered to change luminescence in the presence of oxygen or other analytes and function for months to years in the body. A single injection followed by non-invasive monitoring with a hand-held or wearable Bluetooth optical reader enables intermittent or continuous measurements...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28682268/assessment-of-homomorphic-analysis-for-human-activity-recognition-from-acceleration-signals
#18
Sebastian Rodrigo Vanrell, Diego Humberto Milone, Hugo Leonardo Rufiner
Unobtrusive activity monitoring can provide valuable information for medical and sports applications. In recent years, human activity recognition has moved to wearable sensors to deal with unconstrained scenarios. Accelerometers are the preferred sensors due to their simplicity and availability. Previous studies have examined several \azul{classic} techniques for extracting features from acceleration signals, including time-domain, time-frequency, frequency-domain, and other heuristic features. Spectral and temporal features are the preferred ones and they are generally computed from acceleration components, leaving the acceleration magnitude potential unexplored...
July 3, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28681955/stretchable-motion-memory-devices-based-on-mechanical-hybrid-materials
#19
Yaqing Liu, Zhiyuan Liu, Bowen Zhu, Jiancan Yu, Ke He, Wan Ru Leow, Ming Wang, Bevita K Chandran, Dianpeng Qi, Hong Wang, Geng Chen, Cai Xu, Xiaodong Chen
Animals possess various functional systems such as sensory, nervous, and motor systems, which show effective cooperation in order to realize complicated and intelligent behaviors. This inspires rational designs for the integration of individual electronic devices to exhibit a series of functions, such as sensing, memory, and feedback. Inspired by the fact that humans can monitor and memorize various body motions, a motion memory device is developed to mimic this biological process. In this work, mechanical hybrid substrates are introduced, in which rigid memory devices and stretchable strain sensors are integrated into a single module, which enables them to work cooperatively in the wearable state...
July 6, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28679889/totally-connected-healthcare-with-tv-white-spaces
#20
Konstantinos Katzis, Richard W Jones, Georgios Despotou
Recent technological advances in electronics, wireless communications and low cost medical sensors generated a plethora of Wearable Medical Devices (WMDs), which are capable of generating considerably large amounts of new, unstructured real-time data. This contribution outlines how this data can be propagated to a healthcare system through the internet, using long distance Radio Access Networks (RANs) and proposes a novel communication system architecture employing White Space Devices (WSD) to provide seamless connectivity to its users...
2017: Studies in Health Technology and Informatics
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