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https://www.readbyqxmd.com/read/28933707/high-accuracy-automatic-classification-of-parkinsonian-tremor-severity-using-machine-learning-method
#1
Hyoseon Jeon, Woongwoo Lee, Hyeyoung Park, Hong Ji Lee, Sang Kyong Kim, Han Byul Kim, Beomseok Jeon, Kwang Suk Park
Although clinical aspirations for new technology to accurately measure and diagnose Parkinsonian tremors exist, automatic scoring of tremor severity using machine learning approaches has not yet been employed. Objective: This study aims to maximize the scientific validity of automatic tremor-severity classification using machine learning algorithms to score Parkinsonian tremor severity in the same manner as the Unified Parkinson's Disease Rating Scale (UPDRS) used to rate scores in real clinical practice...
September 21, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28933150/an-ultra-flexible-transparent-oxide-metal-oxide-stack-electrode-with-low-sheet-resistance-for-electrophysiological-measurements
#2
Yasutoshi Jimbo, Naoji Matsuhisa, Wonryung Lee, Peter Zalar, Hiroaki Jinno, Tomoyuki Yokota, Masaki Sekino, Takao Someya
Flexible, transparent electrodes are a crucial component for future implantable and wearable systems. For practical applications, conductivity and flexibility should be further improved to prevent signal attenuation, heat generation, and disconnection. Herein, we fabricate an ultra-flexible transparent electrode with low sheet resistance (8.6 Ω/sq) using an indium-tin-oxide/Au/indium-tin-oxide multilayer on a 1 µm-thick parylene substrate. The electrodes were foldable, and when compared to pristine ITO displayed greater mechanical robustness...
September 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28931984/reliability-and-validity-of-measuring-respiration-movement-using-a-wearable-strain-sensor-in-healthy-subjects
#3
Haijuan Liu, Shaopeng Guo, Kaipei Zheng, Xiaojun Guo, Tsugumi Kuramoto-Ahuja, Tamae Sato, Ko Onoda, Hitoshi Maruyama
[Purpose] The purpose of this research was to verify the reliability and validity of measuring respiration movement using a wearable strain sensor (WSS) which has been developed newly for clinical objective assessment. [Subjects and Methods] The 21 healthy male students were advised to conduct a breathing movement using measuring tape (MT) and WSS respectively, which was the measured at four locations on chest and abdomen wall. The different degree of chest expansion from maximal end of expiration to maximal end of inspiration was confirmed at each location...
September 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28931970/toward-a-versatile-toolbox-for-cucurbit-n-uril-based-supramolecular-hydrogel-networks-through-in-situ-polymerization
#4
Ji Liu, Cindy Soo Yun Tan, Yang Lan, Oren A Scherman
The success of exploiting cucurbit[n]uril (CB[n])-based molecular recognition in self-assembled systems has sparked a tremendous interest in polymer and materials chemistry. In this study, polymerization in the presence of host-guest complexes is applied as a modular synthetic approach toward a diverse set of CB[8]-based supramolecular hydrogels with desirable properties, such as mechanical strength, toughness, energy dissipation, self-healing, and shear-thinning. A range of vinyl monomers, including acrylamide-, acrylate-, and imidazolium-based hydrophilic monomers, could be easily incorporated as the polymer backbones, leading to a library of CB[8] hydrogel networks...
September 15, 2017: Journal of Polymer Science. Part A, Polymer Chemistry
https://www.readbyqxmd.com/read/28931933/buckling-structured-stretchable-pseudocapacitor-yarn
#5
Duck Weon Lee, Jung Han Lee, Nam Ki Min, Joon-Hyung Jin
Cable-type stretchable electrochemical pseudocapacitors based on multi-walled carbon nanotube (MWCNT) sheets and two different metal oxide nanopowders (NP), i.e., MnO2 and RuO2 are developed using a newly-devised dry painting method to mechanically fix the NP to the elastic rubber-based MWCNT electrode substrate, resulting in a porous buckling structured pseudocapacitor yarn. Highly stretchable stylene-ethylene/butylene-stylene (SEBS) is used as the supporting elastomeric core for wrapping with the MWCNT sheets and the electroactive NP...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28929373/security-belt-for-wireless-implantable-medical-devices
#6
Selman Kulaç
In this study, a new protective design compatible with existing non-secure systems was proposed, since it is focused on the secure communication of wireless IMD systems in all transmissions. This new protector is an external wearable device and appears to be a belt fitted around for the patients IMD implanted. However, in order to provide effective full duplex transmissions and physical layer security, some sophisticated transceiver antennas have been placed on the belt. In this approach, beam-focused multi-antennas in optimal positions on the belt are randomly switched when transmissions to the IMD are performed and multi-jammer switching with MRC combining or majority-rule based receiving techniques are applied when transmissions from the IMD are carried out...
September 19, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28928650/locomotor-sub-functions-for-control-of-assistive-wearable-robots
#7
Maziar A Sharbafi, Andre Seyfarth, Guoping Zhao
A primary goal of comparative biomechanics is to understand the fundamental physics of locomotion within an evolutionary context. Such an understanding of legged locomotion results in a transition from copying nature to borrowing strategies for interacting with the physical world regarding design and control of bio-inspired legged robots or robotic assistive devices. Inspired from nature, legged locomotion can be composed of three locomotor sub-functions, which are intrinsically interrelated: Stance: redirecting the center of mass by exerting forces on the ground...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/28926613/human-in-the-loop-bayesian-optimization-of-wearable-device-parameters
#8
Myunghee Kim, Ye Ding, Philippe Malcolm, Jozefien Speeckaert, Christoper J Siviy, Conor J Walsh, Scott Kuindersma
The increasing capabilities of exoskeletons and powered prosthetics for walking assistance have paved the way for more sophisticated and individualized control strategies. In response to this opportunity, recent work on human-in-the-loop optimization has considered the problem of automatically tuning control parameters based on realtime physiological measurements. However, the common use of metabolic cost as a performance metric creates significant experimental challenges due to its long measurement times and low signal-to-noise ratio...
2017: PloS One
https://www.readbyqxmd.com/read/28925684/carbon-nanotube-based-ion-selective-sensors-for-wearable-applications
#9
Soumyendu Roy, Moshe David-Pur, Yael Hanein
Wearable electronics offer new opportunities in a wide range of applications, especially sweat analysis using skin sensors. A fundamental challenge in these applications is the formation of sensitive and stable electrodes. In this article we report the development of a wearable sensor based on carbon nanotube (CNT) electrode arrays for sweat sensing. Solid-state ion selective electrodes (ISEs), sensitive to Na+ ions, were prepared by drop coating plasticized poly-vinyl chloride (PVC) doped with ionophore and ion exchanger on CNT electrodes...
September 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28924567/rearrangeable-and-exchangeable-optical-module-with-system-on-chip-for-wearable-functional-near-infrared-spectroscopy-system
#10
Tsukasa Funane, Takashi Numata, Hiroki Sato, Shinsuke Hiraizumi, Yuichi Hasegawa, Hidenobu Kuwabara, Kiyoshi Hasegawa, Masashi Kiguchi
We developed a system-on-chip (SoC)-incorporated light-emitting diode (LED) and avalanche photodiode (APD) modules to improve the usability and flexibility of a fiberless wearable functional near-infrared spectroscopy (fNIRS) system. The SoC has a microprocessing unit and programmable circuits. The time division method and the lock-in method were used for separately detecting signals from different positions and signals of different wavelengths, respectively. Each module autonomously works for this time-divided-lock-in measurement with a high sensitivity for haired regions...
January 2018: Neurophotonics
https://www.readbyqxmd.com/read/28924220/towards-addressing-the-body-electrolyte-environment-via-sweat-analysis-pilocarpine-iontophoresis-supports-assessment-of-plasma-potassium-concentration
#11
Donato Vairo, Laurie Bruzzese, Marion Marlinge, Lea Fuster, Nabil Adjriou, Nathalie Kipson, Philippe Brunet, Jennifer Cautela, Yves Jammes, Giovanna Mottola, Stephane Burtey, Jean Ruf, Regis Guieu, Emmanuel Fenouillet
Electrolyte concentration in sweat depends on environmental context and physical condition but also on the pathophysiological status. Sweat analyzers may be therefore the future way for biological survey although how sweat electrolyte composition can reflect plasma composition remains unclear. We recruited 10 healthy subjects and 6 patients to have a broad range of plasma electrolyte concentrations (chloride, potassium and sodium) and pH. These variables were compared to those found in sweat produced following cycling exercise or pilocarpine iontophoresis, a condition compatible with operating a wearable device...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28923968/soft-tubular-microfluidics-for-2d-and-3d-applications
#12
Wang Xi, Fang Kong, Joo Chuan Yeo, Longteng Yu, Surabhi Sonam, Ming Dao, Xiaobo Gong, Chwee Teck Lim
Microfluidics has been the key component for many applications, including biomedical devices, chemical processors, microactuators, and even wearable devices. This technology relies on soft lithography fabrication which requires cleanroom facilities. Although popular, this method is expensive and labor-intensive. Furthermore, current conventional microfluidic chips precludes reconfiguration, making reiterations in design very time-consuming and costly. To address these intrinsic drawbacks of microfabrication, we present an alternative solution for the rapid prototyping of microfluidic elements such as microtubes, valves, and pumps...
September 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28922544/flexible-photodetectors-based-on-novel-functional-materials
#13
REVIEW
Chao Xie, Feng Yan
Flexible photodetectors have attracted a great deal of research interest in recent years due to their great possibilities for application in a variety of emerging areas such as flexible, stretchable, implantable, portable, wearable and printed electronics and optoelectronics. Novel functional materials, including materials with zero-dimensional (0D) and one-dimensional (1D) inorganic nanostructures, two-dimensional (2D) layered materials, organic semiconductors and perovskite materials, exhibit appealing electrical and optoelectrical properties, as well as outstanding mechanical flexibility, and have been widely studied as building blocks in cost-effective flexible photodetection...
September 18, 2017: Small
https://www.readbyqxmd.com/read/28922132/design-of-secure-and-lightweight-authentication-protocol-for-wearable-devices-environment
#14
Ashok Kumar Das, Mohammad Wazid, Neeraj Kumar, Muhammad Khurram Khan, Kim-Kwang Raymond Choo, YoungHo Park
Wearable devices are used in various applications to collect information including step information, sleeping cycles, workout statistics, and health related information. Due to the nature and richness of the data collected by such devices, it is important to ensure the security of the collected data. This paper presents a new lightweight authentication scheme suitable for wearable device deployment. The scheme allows a user to mutually authenticate his/her wearable device(s) and the mobile terminal (e.g., Android and iOS device) and establish a session key among these devices (worn and carried by the same user) for secure communication between the wearable device and the mobile terminal...
September 18, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28922112/effects-of-flexible-dry-electrode-design-on-electrodermal-activity-stimulus-response-detection
#15
Peter A Haddad, Amir Servati, Saeid Soltanian, Frank Ko, Peyman Servati
OBJECTIVE: The focus of this research is to evaluate the effects of design parameters including surface area, distance between and geometry of dry flexible electrodes on electrodermal activity (EDA) stimulus response detection. METHODS: EDA is a result of the autonomic nervous system (ANS) being stimulated, which causes sweat and changes the electrical characteristics of the skin. Standard silver/silver chloride (Ag/AgCl) EDA electrodes are rigid and lack conformability in contact with skin...
September 18, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28920434/ultralow-temperature-solution-processed-aluminum-oxide-dielectrics-via-local-structure-control-of-nanoclusters
#16
Jeong-Wan Jo, Yong-Hoon Kim, Joohyung Park, Jae Sang Heo, Seongpil Hwang, Won-June Lee, Myung-Han Yoon, Myung-Gil Kim, Sung Kyu Park
Oxide dielectric materials play a key role in a wide range of high-performance solid-state electronics from semiconductor devices to emerging wearable and soft bio-electronic devices. Although lots of previous advances are noteworthy, their typical processing temperature still far exceeds the thermal limitations of soft materials, impeding their wide utilization in these emerging fields. Here, we report an innovative route to form highly reliable aluminum-oxide dielectric films using an ultralow temperature (< 60 ˚C) solution process with a class of oxide nanocluster precursors...
September 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28920174/features-and-effects-of-information-technology-based-interventions-to-improve-self-management-in-chronic-kidney-disease-patients-a-systematic-review-of-the-literature
#17
Fateme Rangraz Jeddi, Ehsan Nabovati, Shahrzad Amirazodi
Slowing down the progression of chronic kidney disease (CKD) and its adverse health outcomes requires the patient's self-management and attention to treatment recommendations. Information technology (IT)-based interventions are increasingly being used to support self-management in patients with chronic diseases such as CKD. We conducted a systematic review of randomized controlled trials (RCTs) to assess the features and effects of IT-based interventions on self-management outcomes of CKD patients. A comprehensive search was conducted in Medline, Scopus, and the Cochrane Library to identify relevant papers that were published until May 2016...
September 18, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28920127/incident-angle-controlled-semitransparent-colored-perovskite-solar-cells-with-improved-efficiency-exploiting-a-multilayer-dielectric-mirror
#18
Kyu-Tae Lee, Ji-Yun Jang, Sang Jin Park, Song Ah Ok, Hui Joon Park
See-through perovskite solar cells with high efficiency and iridescent colors are demonstrated by employing a multilayer dielectric mirror. A certain amount of visible light is used for wide color gamut semitransparent color generation, which can be easily tuned by changing an angle of incidence, and a wide range of visible light is efficiently reflected back toward a photoactive layer of the perovskite solar cells by the dielectric mirror for highly efficient light-harvesting performance, thus achieving 10...
September 18, 2017: Nanoscale
https://www.readbyqxmd.com/read/28919217/population-based-beat-to-beat-qt-analysis-from-holter-recordings-in-the-long-qt-syndrome
#19
Alex Page, Scott McNitt, Xiaojuan Xia, Wojciech Zareba, Jean-Philippe Couderc
The increasing dissemination of wearable ECG recorders (e.g. Holter, patches, and strap sensors) enables the acquisition of large amounts of data during long periods of time. However, the clinical value of these long-term continuous recordings is hindered by the lack of automatic tools to extract clinically relevant information (other than non-sinus and life-threatening rhythms) from such long-term data, particularly when targeting population-based research. In this work, we propose and test a new tool for analyzing beat-to-beat interval measurements and extracting features from Holter ECGs...
August 10, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28915915/nocturnal-heart-rate-variability-in-1-year-old-infants-analyzed-by-using-the-least-square-cosine-spectrum-method
#20
Yuko Kochiya, Akari Hirabayashi, Yuhei Ichimaru
BACKGROUND: To evaluate the dynamic nature of nocturnal heart rate variability, RR intervals recorded with a wearable heart rate sensor were analyzed using the Least Square Cosine Spectrum Method. METHODS: Six 1-year-old infants participated in the study. A wearable heart rate sensor was placed on their chest to measure RR intervals and 3-axis acceleration. Heartbeat time series were analyzed for every 30 s using the Least Square Cosine Spectrum Method, and an original parameter to quantify the regularity of respiratory-related heart rate rhythm was extracted and referred to as "RA (RA-COSPEC: Respiratory Area obtained by COSPEC)...
September 16, 2017: Journal of Physiological Anthropology
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