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https://www.readbyqxmd.com/read/29140355/enhancing-the-resolution-of-a-near-eye-display-with-a-pancharatnam-berry-phase-deflector
#1
Yun-Han Lee, Tao Zhan, Shin-Tson Wu
We report an electro-optic image shifter to enhance the resolution of display devices with a Pancharatnam-Berry phase deflector (PBD). The switching time of our PBD is less than 1 ms. Through synchronizing and computational factorization, we are able to double the display resolution for reducing the screen door effect. Such a thin and lightweight PBD image shifter can be easily integrated into wearable display devices. Its potential application for virtual reality and augmented reality is emphasized.
November 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/29140281/non-contact-sensor-for-long-term-continuous-vital-signs-monitoring-a-review-on-intelligent-phased-array-doppler-sensor-design
#2
REVIEW
Travis Hall, Donald Y C Lie, Tam Q Nguyen, Jill C Mayeda, Paul E Lie, Jerry Lopez, Ron E Banister
It has been the dream of many scientists and engineers to realize a non-contact remote sensing system that can perform continuous, accurate and long-term monitoring of human vital signs as we have seen in many Sci-Fi movies. Having an intelligible sensor system that can measure and record key vital signs (such as heart rates and respiration rates) remotely and continuously without touching the patients, for example, can be an invaluable tool for physicians who need to make rapid life-and-death decisions. Such a sensor system can also effectively help physicians and patients making better informed decisions when patients' long-term vital signs data is available...
November 15, 2017: Sensors
https://www.readbyqxmd.com/read/29138050/a-systematic-review-on-the-effect-of-serious-games-and-wearable-technology-used-in-rehabilitation-of-patients-with-traumatic-bone-and-soft-tissue-injuries
#3
REVIEW
Henriëtte A W Meijer, Maurits Graafland, J Carel Goslings, Marlies P Schijven
OBJECTIVE: To determine the effects on functional outcomes and treatment adherence of wearable technology and serious games (i.e., interactive computer applications with specific purposes useful in the 'real world') currently applied in physical rehabilitation of patients after traumatic bone and soft tissue injuries. DATA SOURCES: PubMed, Embase, the Cochrane Library and CINAHL were searched without publication date restrictions for the terms 'wearable', 'serious game', 'videogame' or 'mobile application', and 'rehabilitation', 'exercise therapy' or 'physiotherapy'...
November 11, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29137456/highly-stretchable-conductors-based-on-expanded-graphite-macro-confined-in-tubular-rubber
#4
Wei Luo, Tongfei Wu, Biqiong Chen, Mei Liang, Huawei Zou
Highly stretchable and durable conductors are significant to the development of wearable devices, robots, human-machine interfaces and other artificial intelligence products. Although many respectable methods have been reported, it is still a challenge to fabricate stretchable conductors with a large elastic limit, high conductivity and excellent reliability in rapid, effective and economic ways. Herein, a facile method is offered to fabricate high-performance stretchable tubular conductors (TCs) based on a macro-confined structure of expanded graphite (EG) in rubber tubing by simply physical packing...
November 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29135928/wearable-wide-range-strain-sensors-based-on-ionic-liquids-and-monitoring-of-human-activities
#5
Shao-Hui Zhang, Feng-Xia Wang, Jia-Jia Li, Hong-Dan Peng, Jing-Hui Yan, Ge-Bo Pan
Wearable sensors for detection of human activities have encouraged the development of highly elastic sensors. In particular, to capture subtle and large-scale body motion, stretchable and wide-range strain sensors are highly desired, but still a challenge. Herein, a highly stretchable and transparent stain sensor based on ionic liquids and elastic polymer has been developed. The as-obtained sensor exhibits impressive stretchability with wide-range strain (from 0.1% to 400%), good bending properties and high sensitivity, whose gauge factor can reach 7...
November 14, 2017: Sensors
https://www.readbyqxmd.com/read/29134702/editable-supercapacitors-with-customizable-stretchability-based-on-mechanically-strengthened-ultralong-mno2-nanowire-composite
#6
Zhisheng Lv, Yifei Luo, Yuxin Tang, Jiaqi Wei, Zhiqiang Zhu, Xinran Zhou, Wenlong Li, Yi Zeng, Wei Zhang, Yanyan Zhang, Dianpeng Qi, Shaowu Pan, Xian Jun Loh, Xiaodong Chen
Although some progress has been made on stretchable supercapacitors, traditional stretchable supercapacitors fabricated by predesigning structured electrodes for device assembling still lack the device-level editability and programmability. To adapt to wearable electronics with arbitrary configurations, it is highly desirable to develop editable supercapacitors that can be directly transferred into desirable shapes and stretchability. In this work, editable supercapacitors for customizable shapes and stretchability using electrodes based on mechanically strengthened ultralong MnO2 nanowire composites are developed...
November 14, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29133859/conformal-transistor-arrays-based-on-solution-processed-organic-crystals
#7
Xiaoli Zhao, Bing Zhang, Qingxin Tang, Xueyan Ding, Shuya Wang, Yuying Zhou, Yanhong Tong, Yichun Liu
Conformal transistor array based on solution-processed organic crystals, which can provide sensory and scanning features for monitoring, biofeedback, and tracking of physiological function, presents one of the most promising technologies for future large-scale low-cost wearable and implantable electronics. However, it is still a huge challenge for the integration of solution-processed organic crystals into conformal FETs owing to a generally existing swelling phenomenon of the elastic materials and the lack of the corresponding device fabrication technology...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29132639/technical-attributes-health-attribute-consumer-attributes-and-their-roles-in-adoption-intention-of-healthcare-wearable-technology
#8
Min Zhang, Meifen Luo, Rui Nie, Yan Zhang
PURPOSE: This paper aims to explore factors influencing the healthcare wearable technology adoption intention from perspectives of technical attributes (perceived convenience, perceived irreplaceability, perceived credibility and perceived usefulness), health attribute (health belief) and consumer attributes (consumer innovativeness, conspicuous consumption, informational reference group influence and gender difference). DESIGN/METHODOLOGY/APPROACH: By integrating technology acceptance model, health belief model, snob effect and conformity and reference group theory, hypotheses and research model are proposed...
December 2017: International Journal of Medical Informatics
https://www.readbyqxmd.com/read/29131646/multifunctional-material-with-efficient-optoelectronic-integrated-molecular-switches-based-on-a-flexible-thin-film-crystal
#9
Chang Xu, Wan-Ying Zhang, Qiong Ye, Da-Wei Fu
Switchable materials, due to their potential applications in the fields of sensors, photonic devices, digital processing, etc., have been developed drastically. However, they still face great challenges in effectively inducing multiple molecular switching. Herein organic-inorganic hybrid compounds, an emerging class of hydrosoluble optoelectronic-active materials, welcome a new member with smart unique optical/electrical (fluorescence/dielectric) dual switches (switching ON/OFF), that is, [C5H13NBr][Cd3Br7] (1) in the form of both a bulk crystal and an ultraflexible monodirectional thin film, which simultaneously exhibits fast dielectric/fluorescent dual switching triggered by an optical/thermal/electric signal with a high signal-to-noise ratio of 35 (the highest one in the known optical/dielectric dual molecular switches)...
November 13, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29131415/superior-toughness-and-fast-self-healing-at-room-temperature-engineered-by-transparent-elastomers
#10
Seon-Mi Kim, Hyeonyeol Jeon, Sung-Ho Shin, Seul-A Park, Jonggeon Jegal, Sung Yeon Hwang, Dongyeop X Oh, Jeyoung Park
The most important properties of self-healing polymers are efficient recovery at room temperature and prolonged durability. However, these two characteristics are contradictory, making it difficult to optimize them simultaneously. Herein, a transparent and easily processable thermoplastic polyurethane (TPU) with the highest reported tensile strength and toughness (6.8 MPa and 26.9 MJ m(-3) , respectively) is prepared. This TPU is superior to reported contemporary room-temperature self-healable materials and conveniently heals within 2 h through facile aromatic disulfide metathesis engineered by hard segment embedded aromatic disulfides...
November 13, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29130977/effects-of-wearable-sensor-based-balance-and-gait-training-on-balance-gait-and-functional-performance-in-healthy-and-patient-populations-a-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#11
Katharina Gordt, Thomas Gerhardy, Bijan Najafi, Michael Schwenk
BACKGROUND: Wearable sensors (WS) can accurately measure body motion and provide interactive feedback for supporting motor learning. OBJECTIVE: This review aims to summarize current evidence for the effectiveness of WS training for improving balance, gait and functional performance. METHODS: A systematic literature search was performed in PubMed, Cochrane, Web of Science, and CINAHL. Randomized controlled trials (RCTs) using a WS exercise program were included...
November 1, 2017: Gerontology
https://www.readbyqxmd.com/read/29130301/omni-purpose-stretchable-strain-sensor-based-on-a-highly-dense-nanocracking-structure-for-whole-body-motion-monitoring
#12
Hyungkook Jeon, Seong Kyung Hong, Min Seo Kim, Seong J Cho, Geunbae Lim
Here, we report an omni-purpose stretchable strain sensor (OPSS sensor) based on a nanocracking structure for monitoring of whole-body motions including both joint-level and skin-level motions. By controlling and optimizing the nanocracking structure, inspired by the spider sensory system, the OPSS sensor is endowed with both high sensitivity (gauge factor ~30) and wide working range (strain up to 150%) under great linearity (R(2) = 0.9814) and fast response time (<30 ms). Furthermore, the fabrication process of the OPSS sensor has advantages of being extremely simple, patternable, IC (integrated circuit)-compatible and reliable in terms of reproducibility...
November 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29129704/wearable-activity-monitors-in-oncology-trials-current-use-of-an-emerging-technology
#13
REVIEW
Gillian Gresham, Jennifer Schrack, Louise M Gresham, Arvind M Shinde, Andrew E Hendifar, Richard Tuli, B J Rimel, Robert Figlin, Curtis L Meinert, Steven Piantadosi
BACKGROUND: Physical activity is an important outcome in oncology trials. Physical activity is commonly assessed using self-reported questionnaires, which are limited by recall and response biases. Recent advancements in wearable technology have provided oncologists with new opportunities to obtain real-time, objective physical activity data. The purpose of this review was to describe current uses of wearable activity monitors in oncology trials. METHODS: We searched Pubmed, Embase, and the Cochrane Central Register of Controlled Trials for oncology trials involving wearable activity monitors published between 2005 and 2016...
November 9, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/29128285/prolonged-and-localized-sweat-stimulation-by-iontophoretic-delivery-of-the-slowly-metabolized-cholinergic-agent-carbachol
#14
Phillip Simmers, S Kevin Li, Gerald Kasting, Jason Heikenfeld
BACKGROUND: Continuous non-invasive sampling and sensing of multiple classes of analytes could revolutionize medical diagnostics and wearable technologies, but also remains highly elusive because of the many confounding factors for candidate biofluids such as interstitial fluid, tears, saliva, and sweat. Eccrine sweat biosensing has seen a recent surge in demonstrations of wearable sampling and sensing devices. However, for subjects at rest, access to eccrine sweat is highly limited and unpredictable compared to saliva and tears...
November 8, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29127653/development-of-a-3d-workspace-shoulder-assessment-tool-incorporating-electromyography-and-an-inertial-measurement-unit-a-preliminary-study
#15
Navid Aslani, Siamak Noroozi, Philip Davenport, Richard Hartley, Mihai Dupac, Philip Sewell
Traditional shoulder range of movement (ROM) measurement tools suffer from inaccuracy or from long experimental setup times. Recently, it has been demonstrated that relatively low-cost wearable inertial measurement unit (IMU) sensors can overcome many of the limitations of traditional motion tracking systems. The aim of this study is to develop and evaluate a single IMU combined with an electromyography (EMG) sensor to monitor the 3D reachable workspace with simultaneous measurement of deltoid muscle activity across the shoulder ROM...
November 11, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29126580/codebook-based-electrooculography-data-analysis-towards-cognitive-activity-recognition
#16
P Lagodzinski, K Shirahama, M Grzegorzek
With the advancement in mobile/wearable technology, people started to use a variety of sensing devices to track their daily activities as well as health and fitness conditions in order to improve the quality of life. This work addresses an idea of eye movement analysis, which due to the strong correlation with cognitive tasks can be successfully utilized in activity recognition. Eye movements are recorded using an electrooculographic (EOG) system built into the frames of glasses, which can be worn more unobtrusively and comfortably than other devices...
October 28, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29126209/effect-of-real-time-monitoring-and-notification-of-smoking-episodes-on-smoking-reduction-a-pilot-study-of-a-novel-smoking-cessation-app
#17
Reuven Dar
Introduction: Smartphone applications (apps) for smoking cessation are becoming increasingly available, but their efficacy remains to be demonstrated. We conducted a pilot study of SmokeBeat, a novel app designed for use with smartwatches and wristbands. SmokeBeat is powered by a data analytics software platform that processes information from the sensors embedded in wearables. It relies on an original algorithm to identify in real time the hand-to-mouth gestures that characterize smoking a cigarette...
November 6, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/29125584/review-of-recent-inkjet-printed-capacitive-tactile-sensors
#18
REVIEW
Ahmed Salim, Sungjoon Lim
Inkjet printing is an advanced printing technology that has been used to develop conducting layers, interconnects and other features on a variety of substrates. It is an additive manufacturing process that offers cost-effective, lightweight designs and simplifies the fabrication process with little effort. There is hardly sufficient research on tactile sensors and inkjet printing. Advancements in materials science and inkjet printing greatly facilitate the realization of sophisticated tactile sensors. Starting from the concept of capacitive sensing, a brief comparison of printing techniques, the essential requirements of inkjet-printing and the attractive features of state-of-the art inkjet-printed tactile sensors developed on diverse substrates (paper, polymer, glass and textile) are presented in this comprehensive review...
November 10, 2017: Sensors
https://www.readbyqxmd.com/read/29125560/human-actions-analysis-templates-generation-matching-and-visualization-applied-to-motion-capture-of-highly-skilled-karate-athletes
#19
Tomasz Hachaj, Marcin Piekarczyk, Marek R Ogiela
The aim of this paper is to propose and evaluate the novel method of template generation, matching, comparing and visualization applied to motion capture (kinematic) analysis. To evaluate our approach, we have used motion capture recordings (MoCap) of two highly-skilled black belt karate athletes consisting of 560 recordings of various karate techniques acquired with wearable sensors. We have evaluated the quality of generated templates; we have validated the matching algorithm that calculates similarities and differences between various MoCap data; and we have examined visualizations of important differences and similarities between MoCap data...
November 10, 2017: Sensors
https://www.readbyqxmd.com/read/29125425/ethical-and-regulatory-challenges-of-research-using-pervasive-sensing-and-other-emerging-technologies-irb-perspectives
#20
Camille Nebeker, John Harlow, Rebeca Giacinto-Espinoza, Rubi Orozco-Linares, Cinnamon S Bloss, Nadir Weibel
Vast quantities of personal health information and private identifiable information are being created through mobile apps, wearable sensors, and social networks. While new strategies and tools for obtaining health data have expanded researchers' abilities to design and test personalized and adaptive health interventions, the deployment of pervasive sensing and computational techniques to gather research data is raising ethical challenges for Institutional Review Boards (IRBs) charged with protecting research participants...
November 10, 2017: AJOB Empirical Bioethics
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