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Wearable devices

Amber W Kinsey, Matthew Whipple, Lauren Reid, Olivia Affuso
BACKGROUND: Sedentary behavior (SB) is a significant risk factor for heart disease, diabetes, obesity, and early mortality, particularly among women, and the health consequences associated with SB are independent of physical activity status. Interventions utilizing wearable technologies can improve SB, but their effectiveness is influenced by individual preferences, device engagement strategies, and technological features, which may affect user compliance. Gathering a priori insight from target populations on their preferences for program tools and strategies may assist researchers in identifying effective methods to improve the efficacy of SB interventions...
October 20, 2017: JMIR Human Factors
Bryn Dougherty, Sherif M Badawy
BACKGROUND: Wearable technologies provide users hands-free access to computer functions and are becoming increasingly popular on both the consumer market and in various industries. The medical industry has pioneered research and implementation of head-mounted wearable devices, such as Google Glass. Most of this research has focused on surgical interventions; however, other medical fields have begun to explore the potential of this technology to support both patients and clinicians. OBJECTIVE: Our aim was to systematically evaluate the feasibility, usability, and acceptability of using Google Glass in nonsurgical medical settings and to determine the benefits, limitations, and future directions of its application...
October 19, 2017: JMIR MHealth and UHealth
Yi Liu, Jinyang Li, Tanya Tschirhart, Jessica L Terrell, Eunkyoung Kim, Chen-Yu Tsao, Deanna L Kelly, William E Bentley, Gregory F Payne
Biology and electronics are both expert at for accessing, analyzing, and responding to information. Biology uses ions, small molecules, and macromolecules to receive, analyze, store, and transmit information, whereas electronic devices receive input in the form of electromagnetic radiation, process the information using electrons, and then transmit output as electromagnetic waves. Generating the capabilities to connect biology-electronic modalities offers exciting opportunities to shape the future of biosensors, point-of-care medicine, and wearable/implantable devices...
October 18, 2017: Advanced Healthcare Materials
Deah Abbott, Yasmin Shirali, J Kyle Haws, Caleb W Lack
It is difficult to accurately assess and differentially diagnose the anxiety disorders. The current system of assessment relies heavily on the subjective measures of client self-report, clinical observation, and clinical judgment. Fortunately, recent technological advances may enable practitioners to utilize objective, biobehavioral measures of assessment in a clinical setting. The current body of literature on two of these biobehavioral tools (eye-tracking and electrocardiogram devices) is promising, but more validation and standardization research is needed to maximize the utility of these devices...
September 22, 2017: World Journal of Psychiatry
Carl J Thrasher, Johanna Jesse Schwartz, Andrew J Boydston
A series of photoresins suitable for production of elastomeric objects via digital light processing additive manufacturing are reported. Notably, the printing procedure is readily accessible using only entry-level equipment under ambient conditions using visible light projection. The photoresin formulations were found to be modular in nature and straightforward adjustments to the resin components enabled access to a range of compositions and mechanical properties. Collectively, the series includes silicones, hydrogels, and hybrids thereof...
October 17, 2017: ACS Applied Materials & Interfaces
E García-Cruz, A Bretonnet, A Alcaraz
OBJECTIVES: We aimed to explore the potential benefits of using smart glasses - wearable computer optical devices with touch-less command features - in the surgery room and in outpatient care settings in urology. MATERIALS AND METHODS: Between April and November 2015, 80 urologists were invited to use Google Glass in their daily surgical and clinical practice, and to share them with other urologists. Participants rated the usefulness of smart glasses on a 10-point scale, and provided insights on their potential benefits in a telephone interview...
October 13, 2017: Actas Urologicas Españolas
Jianfeng Wu, Huatao Wang, Zhiwei Su, Minghao Zhang, Xiaodong Hu, Yijie Wang, Ziao Wang, Bo Zhong, Weiwei Zhou, Junpeng Liu, Scott Guozhong Xing
Graphene and nano-materials based flexible pressure sensors R&D activities are becoming hot topics due to the huge marketing demand on wearable devices and electronic skin (E-Skin) to monitor human body's actions for dedicated healthcare. Herein, we report a facile and efficient fabrication strategy to construct a new type of highly flexible and sensitive wearable E-Skin based on graphite nanoplates (GNP) and polyurethane (PU) nanocomposite films. The developed GNP/PU E-Skin sensors are highly flexible with good electrical conductivity due to their unique binary microstructures with synergistic interfacial characteristics, which are sensitive to both static and dynamic pressure variation, and even can accurately and quickly detect the pressure as low as 0...
October 17, 2017: ACS Applied Materials & Interfaces
Shi-Cho Cha, Kuo-Hui Yeh, Jyun-Fu Chen
Bluetooth Low Energy (BLE) has emerged as one of the most promising technologies to enable the Internet-of-Things (IoT) paradigm. In BLE-based IoT applications, e.g., wearables-oriented service applications, the Bluetooth MAC addresses of devices will be swapped for device pairings. The random address technique is adopted to prevent malicious users from tracking the victim's devices with stationary Bluetooth MAC addresses and accordingly the device privacy can be preserved. However, there exists a tradeoff between privacy and security in the random address technique...
October 14, 2017: Sensors
Zheng Li, Tieqi Huang, Weiwei Gao, Zhen Xu, Dan Chang, Chunxiao Zhang, Chao Gao
Carbon textiles are promising electrode materials for wearable energy storage devices owing to their conductive, flexible, and lightweight features. However, there still lacks a perfect choice for high-performance carbon textile electrodes with sufficient electrochemical activity. Graphene fiber fabrics (GFFs) are newly discovered carbon textiles, exhibiting various attractive properties, especially a large variability on the microstructure. Here we report the fabrication of hierarchical GFFs with significantly enlarged specific surface area using a hydrothermal activation strategy...
October 18, 2017: ACS Nano
Caiwei Shen, Yingxi Xie, Mohan Sanghadasa, Yong Tang, Longsheng Lu, Liwei Lin
Fiber-based supercapacitors have attracted significant interests because of their potential applications in wearable electronics. Although much progress has been made in recent years, the energy and power densities, mechanical strength, and flexibility of such devices are still in needs of improvement for practical applications. Here we demonstrate an ultra-thin micro coaxial fiber supercapacitor (μCFSC) with high energy and power densities (2.7 mWh/cm3 and 13 W/cm3), as well as excellent mechanical properties...
October 16, 2017: ACS Applied Materials & Interfaces
Chongyin Yang, Xiao Ji, Xiulin Fan, Tao Gao, Liumin Suo, Fei Wang, Wei Sun, Ji Chen, Long Chen, Fudong Han, Ling Miao, Kang Xu, Konstantinos Gerasopoulos, Chunsheng Wang
A flexible and wearable aqueous symmetrical lithium-ion battery is developed using a single LiVPO4 F material as both cathode and anode in a "water-in-salt" gel polymer electrolyte. The symmetric lithium-ion chemistry exhibits high energy and power density and long cycle life, due to the formation of a robust solid electrolyte interphase consisting of Li2 CO3 -LiF, which enables fast Li-ion transport. Energy densities of 141 Wh kg(-1) , power densities of 20 600 W kg(-1) , and output voltage of 2.4 V can be delivered during >4000 cycles, which is far superior to reported aqueous energy storage devices at the same power level...
October 16, 2017: Advanced Materials
José M Morales, Carolina Díaz-Piedra, Héctor Rieiro, Joaquín Roca-González, Samuel Romero, Andrés Catena, Luis J Fuentes, Leandro L Di Stasi
Driver fatigue can impair performance as much as alcohol does. It is the most important road safety concern, causing thousands of accidents and fatalities every year. Thanks to technological developments, wearable, single-channel EEG devices are now getting considerable attention as fatigue monitors, as they could help drivers to assess their own levels of fatigue and, therefore, prevent the deterioration of performance. However, the few studies that have used single-channel EEG devices to investigate the physiological effects of driver fatigue have had inconsistent results, and the question of whether we can monitor driver fatigue reliably with these EEG devices remains open...
October 12, 2017: Accident; Analysis and Prevention
Masanori Tsubosaka, Takafumi Hiranaka, Kenjiro Okimura, Yuta Nakanishi, Yosaku Shibata, Yuichi Hida, Takaaki Fujishiro, Harunobu Uemoto
BACKGROUND: Smart glasses (SG) are a wearable device consisting of a small computer built into a head-mounted monitor (HMM) that can display various kinds of information. Lateral side visualization is displayed on the HMM of SG so the operator may also see it and the anteroposterior (AP) direction simultaneously. The present pilot study aimed to investigate the usefulness of SG in wire insertion for bone fracture. METHODS: We marked both the front and lateral sides of the shaft of an artificial femur bone...
October 1, 2017: Surgical Innovation
Kaat Vandecasteele, Thomas De Cooman, Ying Gu, Evy Cleeren, Kasper Claes, Wim Van Paesschen, Sabine Van Huffel, Borbála Hunyadi
Electrocardiography has added value to automatically detect seizures in temporal lobe epilepsy (TLE) patients. The wired hospital system is not suited for a long-term seizure detection system at home. To address this need, the performance of two wearable devices, based on electrocardiography (ECG) and photoplethysmography (PPG), are compared with hospital ECG using an existing seizure detection algorithm. This algorithm classifies the seizures on the basis of heart rate features, extracted from the heart rate increase...
October 13, 2017: Sensors
Aleksey Lantsov, Maxim Ryabko, Aleksey Shchekin
The work describes features of the compressed sensing (CS) approach utilized for development of a wearable system for wrist vein recognition with single-pixel detection; we consider this system useful for biometrics authentication purposes. The CS approach implies use of a spatial light modulation (SLM) which, in our case, can be performed differently - with a liquid crystal display or diffusely scattering medium. We show that compressed sensing combined with above mentioned means of spatial light modulation allows us to avoid using an optical system - a limiting factor for wearable devices...
October 13, 2017: Journal of Biophotonics
Rebecca Kowalski, Muge Capan, Peter Lodato, Danielle Mosby, Tamekia Thomas, Ryan Arnold, Kristen Miller
Wearable vital sign monitors are a promising step towards optimal patient surveillance, providing continuous data to allow for early detection and treatment of patient deterioration. However, as wearable monitors become more widely adopted in healthcare, there is a corresponding need to carefully design the implementation of these tools to promote their integration into clinical workflows and defend against potential misuse and patient harm. Prior to the roll-out of these monitors, our multidisciplinary team of clinicians, clinical engineers, information technologists and research investigators conducted a modified Healthcare Failure Mode and Effect Analysis (HFMEA), a proactive evaluation of potential problems which could be encountered in the use of a wireless vital signs monitoring system...
October 13, 2017: Journal of Medical Engineering & Technology
Bruno Biagianti, Diego Hidalgo-Mazzei, Nicholas Meyer
The rapidly expanding field of mobile health (mHealth) seeks to harness increasingly affordable and ubiquitous mobile digital technologies including smartphones, tablets, apps and wearable devices to enhance clinical care. Accumulating evidence suggests that mHealth interventions are increasingly being adopted and valued by people living with serious mental illnesses such as schizophrenia and bipolar disorder, as a means of better understanding and managing their condition. We draw on experiences from three geographically and methodologically distinct mHealth studies to provide a pragmatic overview of the key challenges and considerations relating to the process of developing digital interventions for this population...
October 12, 2017: Evidence-based Mental Health
Jiawei Bai, Yifei Sun, Jennifer A Schrack, Ciprian M Crainiceanu, Mei-Cheng Wang
Recent advances of wearable computing technology have allowed continuous health monitoring in large observational studies and clinical trials. Examples of data collected by wearable devices include minute-by-minute physical activity proxies measured by accelerometers or heart rate. The analysis of data generated by wearable devices has so far been quite limited to crude summaries, for example, the mean activity count over the day. To better utilize the full data and account for the dynamics of activity level in the time domain, we introduce a two-stage regression model for the minute-by-minute physical activity proxy data...
October 10, 2017: Biometrics
Roberto Zangróniz, Arturo Martínez-Rodrigo, José Manuel Pastor, María T López, Antonio Fernández-Caballero
This article introduces a new and unobtrusive wearable monitoring device based on electrodermal activity (EDA) to be used in health-related computing systems. This paper introduces the description of the wearable device capable of acquiring the EDA of a subject in order to detect his/her calm/distress condition from the acquired physiological signals. The lightweight wearable device is placed in the wrist of the subject to allow continuous physiological measurements. With the aim of validating the correct operation of the wearable EDA device, pictures from the International Affective Picture System are used in a control experiment involving fifty participants...
October 12, 2017: Sensors
László Hejjel
Accurate pulse rate detection is essential for reliable pulse rate variability analysis. On the other hand, minimizing the sampling frequency is essential to reduce the amounts of data and computational needs, and consequently power consumption of mobile/wearable devices extending their operating hours. Determining variability of physiological parameters needs a new paradigm since there is a limited possibility of calculating an average eliminating random error of measurement. Finding the optimal sampling rate depends on the actual investigation, the expected variability and variability-changes of the study-population...
October 12, 2017: Physiological Measurement
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