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https://www.readbyqxmd.com/read/28821474/validation-relaxation-a-quality-assurance-strategy-for-electronic-data-collection
#1
Avi Kenny, Nicholas Gordon, Thomas Griffiths, John D Kraemer, Mark J Siedner
BACKGROUND: The use of mobile devices for data collection in developing world settings is becoming increasingly common and may offer advantages in data collection quality and efficiency relative to paper-based methods. However, mobile data collection systems can hamper many standard quality assurance techniques due to the lack of a hardcopy backup of data. Consequently, mobile health data collection platforms have the potential to generate datasets that appear valid, but are susceptible to unidentified database design flaws, areas of miscomprehension by enumerators, and data recording errors...
August 18, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28820651/starting-and-stopping-kinetics-of-a-rear-mounted-power-assist-for-manual-wheelchairs
#2
Stephanie Wong, Ben Mortenson, Bonita Sawatzky
A rear mounted, powered, drive wheel has been developed to assist with mobility for manual wheelchairs in indoor and outdoor modes. To start the wheel, users must initiate handrim propulsion with sufficient force to trigger the motor. To stop the indoor mode, users must apply a braking force through the handrims exceeding the device's deceleration threshold. The objectives of this study were to compare 1) the minimum force required to start a wheelchair with and without the wheel, and 2) the distances and forces needed to stop a wheelchair at different treadmill speeds (3...
August 18, 2017: Assistive Technology: the Official Journal of RESNA
https://www.readbyqxmd.com/read/28820461/thermal-response-analysis-of-phospholipid-bilayers-using-ellipsometric-techniques
#3
Carmen M González-Henríquez, Vanessa A Villegas-Opazo, Dallits H Sagredo-Oyarce, Mauricio A Sarabia-Vallejos, Claudio A Terraza
Biomimetic planar artificial membranes have been widely studied due to their multiple applications in several research fields. Their humectation and thermal response are crucial for reaching stability; these characteristics are related to the molecular organization inside the bilayer, which is affected by the aliphatic chain length, saturations, and molecule polarity, among others. Bilayer stability becomes a fundamental factor when technological devices are developed-like biosensors-based on those systems...
August 18, 2017: Biosensors
https://www.readbyqxmd.com/read/28819262/three-dimensional-imaging-of-vortex-structure-in-a-ferroelectric-nanoparticle-driven-by-an-electric-field
#4
D Karpov, Z Liu, T Dos Santos Rolo, R Harder, P V Balachandran, D Xue, T Lookman, E Fohtung
Topological defects of spontaneous polarization are extensively studied as templates for unique physical phenomena and in the design of reconfigurable electronic devices. Experimental investigations of the complex topologies of polarization have been limited to surface phenomena, which has restricted the probing of the dynamic volumetric domain morphology in operando. Here, we utilize Bragg coherent diffractive imaging of a single BaTiO3 nanoparticle in a composite polymer/ferroelectric capacitor to study the behavior of a three-dimensional vortex formed due to competing interactions involving ferroelectric domains...
August 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28819184/black-phosphorus-ink-formulation-for-inkjet-printing-of-optoelectronics-and-photonics
#5
Guohua Hu, Tom Albrow-Owen, Xinxin Jin, Ayaz Ali, Yuwei Hu, Richard C T Howe, Khurram Shehzad, Zongyin Yang, Xuekun Zhu, Robert I Woodward, Tien-Chun Wu, Henri Jussila, Jiang-Bin Wu, Peng Peng, Ping-Heng Tan, Zhipei Sun, Edmund J R Kelleher, Meng Zhang, Yang Xu, Tawfique Hasan
Black phosphorus is a two-dimensional material of great interest, in part because of its high carrier mobility and thickness dependent direct bandgap. However, its instability under ambient conditions limits material deposition options for device fabrication. Here we show a black phosphorus ink that can be reliably inkjet printed, enabling scalable development of optoelectronic and photonic devices. Our binder-free ink suppresses coffee ring formation through induced recirculating Marangoni flow, and supports excellent consistency (< 2% variation) and spatial uniformity (< 3...
August 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28818225/patient-centered-outcomes-of-a-dual-action-pneumatic-compression-device-in-comparison-to-compression-stockings-for-patients-with-chronic-venous-disease
#6
Fedor Lurie, Marc Schwartz
OBJECTIVE: The ACTitouch (AT) device (Tactile Medical, Minneapolis, Minn) represents a new generation of pneumatic compression devices by combining sustained compression with intermittent pneumatic compression. The sustained compression mode provides automatic pressure adjustment every 30 minutes, ensuring pressure consistency regardless of leg volume changes and environmental influences. Designed for mobile patients, this device has not been studied in comparison to standard compression stockings (CS)...
September 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28818075/perspectives-of-basic-wheelchair-users-on-improving-their-access-to-wheelchair-services-in-kenya-and-philippines-a-qualitative-study
#7
Emma Williams, Elizabeth Hurwitz, Immaculate Obaga, Brenda Onguti, Adovich Rivera, Tyrone Reden L Sy, R Lee Kirby, Jamie Noon, Deepti Tanuku, Anthony Gichangi, Eva Bazant
BACKGROUND: The United Nations has called for countries to improve access to mobility devices when needed. The World Health Organization has published guidelines on the provision of manual wheelchairs in less-resourced settings. Yet little is known about the extent to which appropriate wheelchairs are available and provided according to international guidelines. This study's purpose was to describe wheelchair users' experiences receiving services and acquiring wheelchair skills in urban and peri-urban areas of Kenya and the Philippines...
August 17, 2017: BMC International Health and Human Rights
https://www.readbyqxmd.com/read/28817772/quantifying-elucidating-thermally-enhanced-minority-carrier-diffusion-length-using-radius-controlled-rutile-nanowires
#8
Liming Zhang, Litianqi Sun, Zixuan Guan, Sang Chul Lee, Yingzhou Li, Haitao Dean Deng, Yiyang Li, Nadia Ahlborg, Madhur Boloor, Nicholas A Melosh, William C Chueh
Minority carrier diffusion length (LD) is a crucial property that determines the performance of light absorbers in photoelectrochemical (PEC) cells. Many transition-metal oxides are stable photoanodes for solar water splitting but exhibit a small to moderate LD, ranging from a few nanometers (such as α-Fe2O3 and TiO2) to a few tens of nanometers (such as BiVO4). Under operating conditions, temperature of PEC cells can deviate substantially from ambient, yet the temperature-dependence of LD has not been quantified...
August 17, 2017: Nano Letters
https://www.readbyqxmd.com/read/28817447/a-stress-coping-app-for-hospitalized-pregnant-women-at-risk-for-preterm-birth
#9
Nancy Jallo, Leroy R Thacker, Victoria Menzies, Predrag Stojanovic, Dace S Svikis
BACKGROUND: Pregnant women hospitalized with preterm labor (PTL) complications experience increased stress. Prior researchers have attempted to provide stress management strategies with use of various media players to deliver stress coping interventions. PURPOSE: The purpose of this study was to examine the efficacy of a mobile device delivered stress coping app designed to reduce stress in a sample of high-risk pregnant women hospitalized with complications of PTL...
September 2017: MCN. the American Journal of Maternal Child Nursing
https://www.readbyqxmd.com/read/28817289/how-to-drive-a-flashing-electron-ratchet-to-maximize-current
#10
Ofer Kedem, Bryan Lau, Emily A Weiss
Biological systems utilize a combination of asymmetry, noise, and chemical energy to produce motion in the highly damped environment of the cell with molecular motors, many of which are "ratchets", non-equilibrium devices for producing directed transport using non-directional perturbations, without a net bias. The underlying ratchet principle has been implemented in man-made micro- and nano-devices, to transport charged particles by oscillating an electric potential with repeating asymmetric features. In this experimental study, the ratcheting of electrons in an organic semiconductor is optimized by tuning the temporal modulation of the oscillating potential, applied using nanostructured electrodes...
August 17, 2017: Nano Letters
https://www.readbyqxmd.com/read/28816805/development-of-a-mobile-app-for-family-planning-providers
#11
Viannella Halsall, Jennifer Rogers, Jacki Witt, Sejun Song, Hoang Duc Huy Nguyen, Patricia Kelly
PURPOSE: To provide an overview of lessons learned during the development process of an app for iOS and Android based on national recommendations for providing quality family planning services. STUDY AND DESIGN: After a review of existing apps was conducted to determine whether an app of clinical recommendations for family planning existed, a team of clinicians, training specialists, and app developers created a resource app by first drafting a comprehensive content map...
September 2017: MCN. the American Journal of Maternal Child Nursing
https://www.readbyqxmd.com/read/28814055/twiice-a-lightweight-lower-limb-exoskeleton-for-complete-paraplegics
#12
Tristan Vouga, Romain Baud, Jemina Fasola, Mohamed Bouri, Hannes Bleuler
This paper introduces TWIICE, a lower-limb exoskeleton that enables people suffering from complete paraplegia to stand up and walk again. TWIICE provides complete mobilization of the lower-limbs, which is a first step toward enabling the user to regain independence in activities of the daily living. The tasks it can perform include level and inclined walking (up to 20° slope), stairs ascent and descent, sitting on a seat, and standing up. Participation in the world's first Cybathlon (Zurich, 2016) demonstrated good performance at these demanding tasks...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814044/a-survey-of-stakeholder-perspectives-on-a-proposed-combined-exoskeleton-wheelchair-technology
#13
Tim Bhatnagar, W Ben Mortensen, Johanne Mattie, Jamie Wolff, Claire Parker, Jaimie Borisoff
BACKGROUND: Exoskeleton technology has potential benefits for wheelchair users' health and mobility. However, there are practical barriers to their everyday use as a mobility device. In particular, challenges related to travelling longer distances and transitioning between using a wheelchair and exoskeleton walking may present significant deterrents to regular exoskeleton use. In an effort to remove these barriers, a combined exoskeleton-wheelchair concept ('COMBO') has been proposed, which aims to achieve the benefits of both these mobility technologies...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814043/design-of-a-wearable-interface-for-lightweight-robotic-arm-for-people-with-mobility-impairments
#14
Tommaso Lisini Baldi, Giovanni Spagnoletti, Mihai Dragusanu, Domenico Prattichizzo
Many common activities of daily living like open a door or fill a glass of water, which most of us take for granted, could be an insuperable problem for people who have limited mobility or impairments. For years the unique alternative to overcame this limitation was asking for human help. Nowadays thanks to recent studies and technology developments, having an assistive devices to compensate the loss of mobility is becoming a real opportunity. Off-the-shelf assistive robotic manipulators have the capability to improve the life of people with motor impairments...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814042/portable-haptic-device-for-lower-limb-amputee-gait-feedback-assessing-static-and-dynamic-perceptibility
#15
M A B Husman, H F Maqbool, M I Awad, A A Dehghani-Sanij
Loss of joints and severed sensory pathway cause reduced mobility capabilities in lower limb amputees. Although prosthetic devices attempt to restore normal mobility functions, lack of awareness and control of limb placement increase the risk of falling and causing amputee to have high level of visual dependency. Haptic feedback can serve as a cue for gait events during ambulation thus providing sense of awareness of the limb position. This paper presents a wireless wearable skin stretch haptic device to be fitted around the thigh region...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813996/analyzing-at-home-prosthesis-use-in-unilateral-upper-limb-amputees-to-inform-treatment-device-design
#16
Adam J Spiers, Linda Resnik, Aaron M Dollar
New upper limb prosthetic devices are continuously being developed by a variety of industrial, academic, and hobbyist groups. Yet, little research has evaluated the long term use of currently available prostheses in daily life activities, beyond laboratory or survey studies. We seek to objectively measure how experienced unilateral upper limb prosthesis-users employ their prosthetic devices and unaffected limb for manipulation during everyday activities. In particular, our goal is to create a method for evaluating all types of amputee manipulation, including non-prehensile actions beyond conventional grasp functions, as well as to examine the relative use of both limbs in unilateral and bilateral cases...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813992/review-of-the-actuators-of-active-knee-prostheses-and-their-target-design-outputs-for-activities-of-daily-living
#17
Dominik Simon Pieringer, Martin Grimmer, Michael Friedrich Russold, Robert Riener
Active prosthetic knees have the capability to provide net positive work, which is required in daily activities like stair and ramp negotiation or sit-to-stand transfers. Adding this capability might help to increase user mobility, safety, and independence. This article summarizes the biomechanical knee requirements for different activities of daily living and critically compares them with the actuator characteristics of state-of-the-art active prosthetic knee joints. As a result of a systematic literature research 22 active prosthetic knee joints were identified...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813968/changes-in-neuromuscular-activity-during-motor-training-with-a-body-machine-interface-after-spinal-cord-injury
#18
C Pierella, A De Luca, E Tasso, F Cervetto, S Gamba, L Losio, E Quinland, A Venegoni, S Mandraccia, I Muller, A Massone, F A Mussa-Ivaldi, M Casadio
Body machine interfaces (BMIs) are used by people with severe motor disabilities to control external devices, but they also offer the opportunity to focus on rehabilitative goals. In this study we introduced in a clinical setting a BMI that was integrated by the therapists in the rehabilitative treatments of 2 spinal cord injured (SCI) subjects for 5 weeks. The BMI mapped the user's residual upper body mobility onto the two coordinates of a cursor on a screen. By controlling the cursor, the user engaged in playing computer games...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813952/comparative-performance-analysis-of-m-imu-emg-and-voice-user-interfaces-for-assistive-robots
#19
Clemente Laureiti, Francesca Cordella, Francesco Scotto di Luzio, Stefano Saccucci, Angelo Davalli, Rinaldo Sacchetti, Loredana Zollo
People with a high level of disability experience great difficulties to perform activities of daily living and resort to their residual motor functions in order to operate assistive devices. The commercially available interfaces used to control assistive manipulators are typically based on joysticks and can be used only by subjects with upper-limb residual mobilities. Many other solutions can be found in the literature, based on the use of multiple sensory systems for detecting the human motion intention and state...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813919/adding-navigation-artificial-audition-and-vital-sign-monitoring-capabilities-to-a-telepresence-mobile-robot-for-remote-home-care-applications
#20
Sebastien Laniel, Dominic Letourneau, Mathieu Labbe, Francois Grondin, Janice Polgar, Francois Michaud
A telepresence mobile robot is a remote-controlled, wheeled device with wireless internet connectivity for bidirectional audio, video and data transmission. In health care, a telepresence robot could be used to have a clinician or a caregiver assist seniors in their homes without having to travel to these locations. Many mobile telepresence robotic platforms have recently been introduced on the market, bringing mobility to telecommunication and vital sign monitoring at reasonable costs. What is missing for making them effective remote telepresence systems for home care assistance are capabilities specifically needed to assist the remote operator in controlling the robot and perceiving the environment through the robot's sensors or, in other words, minimizing cognitive load and maximizing situation awareness...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
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