keyword
MENU ▼
Read by QxMD icon Read
search

exoskeleton

keyword
https://www.readbyqxmd.com/read/29163120/the-myosuit-bi-articular-anti-gravity-exosuit-that-reduces-hip-extensor-activity-in-sitting-transfers
#1
Kai Schmidt, Jaime E Duarte, Martin Grimmer, Alejandro Sancho-Puchades, Haiqi Wei, Chris S Easthope, Robert Riener
Muscle weakness-which can result from neurological injuries, genetic disorders, or typical aging-can affect a person's mobility and quality of life. For many people with muscle weakness, assistive devices provide the means to regain mobility and independence. These devices range from well-established technology, such as wheelchairs, to newer technologies, such as exoskeletons and exosuits. For assistive devices to be used in everyday life, they must provide assistance across activities of daily living (ADLs) in an unobtrusive manner...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/29132388/a-composite-robotic-based-measure-of-upper-limb-proprioception
#2
Jeffrey M Kenzie, Jennifer A Semrau, Michael D Hill, Stephen H Scott, Sean P Dukelow
BACKGROUND: Proprioception is the sense of the position and movement of our limbs, and is vital for executing coordinated movements. Proprioceptive disorders are common following stroke, but clinical tests for measuring impairments in proprioception are simple ordinal scales that are unreliable and relatively crude. We developed and validated specific kinematic parameters to quantify proprioception and compared two common metrics, Euclidean and Mahalanobis distances, to combine these parameters into an overall summary score of proprioception...
November 13, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29127803/development-of-thresholds-of-excess-toxicity-for-environmental-species-and-their-application-to-identification-of-modes-of-acute-toxic-action
#3
Jin J Li, Xu J Zhang, Yi Yang, Tao Huang, Chao Li, Limin Su, Yuan H Zhao, Mark T D Cronin
The acute toxicity of organic pollutants to fish, Daphnia magna, Tetrahymena pyriformis, and Vibrio fischeri was investigated. The results indicated that the Toxicity Ratio (TR) threshold of log TR =1, which has been based on the distribution of toxicity data to fish, can also be used to discriminate reactive or specifically acting compounds from baseline narcotics for Daphnia magna and Vibrio fischeri. A log TR=0.84 is proposed for Tetrahymena pyriformis following investigation of the relationships between the species sensitivity and the absolute averaged residuals (AAR) between the predicted baseline toxicity and the experimental toxicity...
November 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29125845/biosurfactants-produced-by-scheffersomyces-stipitis-cultured-in-sugarcane-bagasse-hydrolysate-as-new-green-larvicides-for-the-control-of-aedes-aegypti-a-vector-of-neglected-tropical-diseases
#4
Paulo Ricardo Franco Marcelino, Vinícius Luiz da Silva, Rafael Rodrigues Philippini, Cláudio José Von Zuben, Jonas Contiero, Júlio César Dos Santos, Silvio Silvério da Silva
Biosurfactants are microbial metabolites with possible applications in various industrial sectors that are considered ecofriendly molecules. In recent years, some studies identified these compounds as alternatives for the elimination of vectors of tropical diseases, such as Aedes aegypti. The major bottlenecks of biosurfactant industrial production have been the use of conventional raw materials that increase production costs as well as opportunistic or pathogenic bacteria, which restrict the application of these biomolecules...
2017: PloS One
https://www.readbyqxmd.com/read/29122192/physiological-consequences-of-using-an-upper-limb-exoskeleton-during-manual-handling-tasks
#5
Jean Theurel, Kevin Desbrosses, Terence Roux, Adriana Savescu
This study aimed to assess the physiological consequences of using an upper limb exoskeleton during manual handling task, as muscle activity, upper limb kinematics, postural balance and cardiac cost. Participants performed three tasks (load lifting (LIFT), carrying (WALK) and stacking-unstacking (STACK)) with (EXOS) and without (FREE) an exoskeleton. During LIFT and STACK, the activity of the deltoid anterior muscle was significantly lower for EXOS than for FREE. During LIFT, the activity of the triceps brachii (TB) and tibialis anterior muscles significantly increased for EXO...
February 2018: Applied Ergonomics
https://www.readbyqxmd.com/read/29118199/rapid-feedback-responses-are-flexibly-coordinated-across-arm-muscles-to-support-goal-directed-reaching
#6
Jeffrey Weiler, Paul L Gribble, J Andrew Pruszynski
A transcortical pathway helps support goal-directed reaching by processing somatosensory information to produce rapid feedback responses across multiple joints and muscles. We tested whether such feedback responses can account for changes in arm configuration and for arbitrary visuomotor transformations - two manipulations that alter how muscles at the elbow and wrist need to be coordinated to achieve task success. Participants used a planar three degree-of-freedom exoskeleton robot to move a cursor to a target following a mechanical perturbation that flexed the elbow...
November 8, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29117500/development-and-ultrastructure-of-the-rigid-dorsal-and-flexible-ventral-cuticles-of-the-elytron-of-the-red-flour-beetle-tribolium-castaneum
#7
Mi Young Noh, Subbaratnam Muthukrishnan, Karl J Kramer, Yasuyuki Arakane
Insect exoskeletons are composed of the cuticle, a biomaterial primarily formed from the linear and relatively rigid polysaccharide, chitin, and structural proteins. This extracellular material serves both as a skin and skeleton, protecting insects from environmental stresses and mechanical damage. Despite its rather limited compositional palette, cuticles in different anatomical regions or developmental stages exhibit remarkably diverse physicochemical and mechanical properties because of differences in chemical composition, molecular interactions and morphological architecture of the various layers and sublayers throughout the cuticle including the envelope, epicuticle and procuticle (exocuticle and endocuticle)...
November 5, 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29112116/application-of-chitosan-chitooligosaccharide-and-their-derivatives-in-the-treatment-of-alzheimer-s-disease
#8
REVIEW
Qian-Qian Ouyang, Shannon Zhao, Si-Dong Li, Cai Song
Classic hypotheses of Alzheimer's disease (AD) include cholinergic neuron death, acetylcholine (ACh) deficiency, metal ion dynamic equilibrium disorder, and deposition of amyloid and tau. Increased evidence suggests neuroinflammation and oxidative stress may cause AD. However, none of these factors induces AD independently, but they are all associated with the formation of Aβ and tau proteins. Current clinical treatments based on ACh deficiency can only temporarily relieve symptoms, accompanied with many side-effects...
November 7, 2017: Marine Drugs
https://www.readbyqxmd.com/read/29110547/robotic-exoskeletons-for-reengaging-in-everyday-activities-promises-pitfalls-and-opportunities
#9
Heather Fritz, Diane Patzer, Sujay S Galen
PURPOSE: Media images and marketing materials suggest a future in which individuals with spinal cord injury (SCI) can utilize robotic exoskeletons to reengage in everyday activities, yet these narratives may not align with the current technological realities. The purpose of this paper is to present and describe the current use of robotic exoskeletons in rehabilitation and home settings and discuss the benefits and limitations of the devices. MATERIALS AND METHODS: We provide an overview of the features and limitations of the four robotic exoskeleton products (EKSO Bionics, ReWalk, Rex Bionics, and Indego) that are currently being used in in the United States in rehabilitation settings...
November 7, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/29109981/variable-damping-force-tunnel-for-gait-training-using-alex-iii
#10
Paul Stegall, Damiano Zanotto, Sunil K Agrawal
Haptic feedback affects not only the quality of training but can also influence the physical design of robotic gait trainers by determining how much force needs to be applied to the user and the nature of the force. This paper presents the design of a variable damping force tunnel and explores the effect of the shape and strength of the damping field using ALEX III, a treadmill-based exoskeleton developed at Columbia University. The study consists of 32 healthy subjects who were trained for 40 minutes in the device...
July 2017: IEEE Robotics and Automation Letters
https://www.readbyqxmd.com/read/29105657/gait-training-after-spinal-cord-injury-safety-feasibility-and-gait-function-following-8-weeks-of-training-with-the-exoskeletons-from-ekso-bionics
#11
Carsten Bach Baunsgaard, Ulla Vig Nissen, Anne Katrin Brust, Angela Frotzler, Cornelia Ribeill, Yorck-Bernhard Kalke, Natacha León, Belén Gómez, Kersti Samuelsson, Wolfram Antepohl, Ulrika Holmström, Niklas Marklund, Thomas Glott, Arve Opheim, Jesus Benito, Narda Murillo, Janneke Nachtegaal, Willemijn Faber, Fin Biering-Sørensen
STUDY DESIGN: Prospective quasi-experimental study, pre- and post-design. OBJECTIVES: Assess safety, feasibility, training characteristics and changes in gait function for persons with spinal cord injury (SCI) using the robotic exoskeletons from Ekso Bionics. SETTING: Nine European rehabilitation centres. METHODS: Robotic exoskeleton gait training, three times weekly over 8 weeks. Time upright, time walking and steps in the device (training characteristics) were recorded longitudinally...
November 6, 2017: Spinal Cord
https://www.readbyqxmd.com/read/29104747/design-and-interaction-control-of-a-new-bilateral-upper-limb-rehabilitation-device
#12
Qing Miao, Mingming Zhang, Yupu Wang, Sheng Q Xie
This paper proposed a bilateral upper-limb rehabilitation device (BULReD) with two degrees of freedom (DOFs). The BULReD is portable for both hospital and home environment, easy to use for therapists and patients, and safer with respect to upper-limb robotic exoskeletons. It was implemented to be able to conduct both passive and interactive training, based on system kinematics and dynamics, as well as the identification of real-time movement intention of human users. Preliminary results demonstrate the potential of the BULReD for clinical applications, with satisfactory position and interaction force tracking performance...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29104424/new-design-of-a-soft-robotics-wearable-elbow-exoskeleton-based-on-shape-memory-alloy-wire-actuators
#13
Dorin Copaci, Enrique Cano, Luis Moreno, Dolores Blanco
The elbow joint is a complex articulation composed of the humeroulnar and humeroradial joints (for flexion-extension movement) and the proximal radioulnar articulation (for pronation-supination movement). During the flexion-extension movement of the elbow joint, the rotation center changes and this articulation cannot be truly represented as a simple hinge joint. The main goal of this project is to design and assemble a medical rehabilitation exoskeleton for the elbow with one degree of freedom for flexion-extension, using the rotation center for proper patient elbow joint articulation...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29104363/towards-total-energy-shaping-control-of-lower-limb-exoskeletons
#14
Ge Lv, Robert D Gregg
Current robotic exoskeletons enforce fixed reference joint patterns during gait rehabilitation. These control methods aim to replicate normative joint kinematics but do not facilitate learning patient-specific kinematics. Trajectory-free control methods for exoskeletons are required to promote user control over joint kinematics. Our prior work on potential energy shaping provides virtual body-weight support through a trajectory-free control law, but altering only the gravitational forces does not assist the subject in accelerating/decelerating the body forward...
May 2017: Proceedings of the ... American Control Conference
https://www.readbyqxmd.com/read/29092520/a-brain-controlled-lower-limb-exoskeleton-for-human-gait-training
#15
Dong Liu, Weihai Chen, Zhongcai Pei, Jianhua Wang
Brain-computer interfaces have been a novel approach to translate human intentions into movement commands in robotic systems. This paper describes an electroencephalogram-based brain-controlled lower-limb exoskeleton for gait training, as a proof of concept towards rehabilitation with human-in-the-loop. Instead of using conventional single electroencephalography correlates, e.g., evoked P300 or spontaneous motor imagery, we propose a novel framework integrated two asynchronous signal modalities, i.e., sensorimotor rhythms (SMRs) and movement-related cortical potentials (MRCPs)...
October 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29081392/hybrid-assistive-limb-exoskeleton-hal%C3%A2-in-the-rehabilitation-of-chronic-sci-proof-of-concept-the-results-of-21-patients
#16
Oliver Jansen, Dennis Grasmuecke, Renate C Meindl, Martin Tegenthoff, Peter Schwenkreis, Matthias Sczesny-Kaiser, Martin Wessling, Thomas A Schildhauer, Christian Fisahn, Mirko Aach
INTRODUCTION: The use of mobile exoskeletons is becoming more and more common in the field of spinal cord injury rehabilitation. The hybrid assistive limb exoskeleton (HAL) provides a tailored support depending on the patient's voluntary drive. MATERIALS AND METHODS: After a pilot study which included 8 chronic SCI patients (2014), this study of 21 chronic SCI patients serves as a proof of concept. It was conducted to provide further evidence regarding the efficacy of exoskeletal-based rehabilitation...
October 25, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29075440/efficient-isolation-method-for-high-quality-genomic-dna-from-cicada-exuviae
#17
Hoa Quynh Nguyen, Ye Inn Kim, Amaël Borzée, Yikweon Jang
In recent years, animal ethics issues have led researchers to explore nondestructive methods to access materials for genetic studies. Cicada exuviae are among those materials because they are cast skins that individuals left after molt and are easily collected. In this study, we aim to identify the most efficient extraction method to obtain high quantity and quality of DNA from cicada exuviae. We compared relative DNA yield and purity of six extraction protocols, including both manual protocols and available commercial kits, extracting from four different exoskeleton parts...
October 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29075039/exceptional-appendage-and-soft-tissue-preservation-in-a-middle-triassic-horseshoe-crab-from-sw-china
#18
Shixue Hu, Qiyue Zhang, Rodney M Feldmann, Michael J Benton, Carrie E Schweitzer, Jinyuan Huang, Wen Wen, Changyong Zhou, Tao Xie, Tao Lü, Shuigen Hong
Horseshoe crabs are classic "living fossils", supposedly slowly evolving, conservative taxa, with a long fossil record back to the Ordovician. The evolution of their exoskeleton is well documented by fossils, but appendage and soft-tissue preservation is extremely rare. Here we analyse details of appendage and soft-tissue preservation in Yunnanolimulus luopingensis, a Middle Triassic (ca. 244 million years old) horseshoe crab from Yunnan Province, SW China. The remarkable preservation of anatomical details including the chelicerae, five pairs of walking appendages, opisthosomal appendages with book gills, muscles, and fine setae permits comparison with extant horseshoe crabs...
October 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29068628/upper-limb-rehabilitation-robot-powered-by-pams-cooperates-with-fes-arrays-to-realize-reach-to-grasp-trainings
#19
Xikai Tu, Hualin Han, Jian Huang, Jian Li, Chen Su, Xiaobo Jiang, Jiping He
The reach-to-grasp activities play an important role in our daily lives. The developed RUPERT for stroke patients with high stiffness in arm flexor muscles is a low-cost lightweight portable exoskeleton rehabilitation robot whose joints are unidirectionally actuated by pneumatic artificial muscles (PAMs). In order to expand the useful range of RUPERT especially for patients with flaccid paralysis, functional electrical stimulation (FES) is taken to activate paralyzed arm muscles. As both the exoskeleton robot driven by PAMs and the neuromuscular skeletal system under FES possess the highly nonlinear and time-varying characteristics, iterative learning control (ILC) is studied and is taken to control this newly designed hybrid rehabilitation system for reaching trainings...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29065680/scallop-inspired-dna-nanomachine-a-ratiometric-nanothermometer-for-intracellular-temperature-sensing
#20
Nuli Xie, Jin Huang, Xiaohai Yang, Xiaoxiao He, Jianbo Liu, Jiaqi Huang, Hongmei Fang, Kemin Wang
Accurate measurement of intracellular temperature is of great significance in biology and medicine. With use of DNA nanotechnology and inspiration by nature's examples of "protective and reversible responses" exoskeletons, a scallop-inspired DNA nanomachine (SDN) is desgined as a ratiometric nanothermometer for intracellular temperature sensing. The SDN is composed of a rigid DNA tetrahedron, where a thermal-sensitive molecular beacon (MB) is embedded in one edge of the DNA tetrahedron. Relying on the thermal-sensitive MB and fluorescence resonance energy transfer (FRET) signaling mechanism, the "On" to "Off" signal is reversibly responding to "below" and "over" the melting temperature...
November 3, 2017: Analytical Chemistry
keyword
keyword
49875
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"