This article presents Exo-Glove Poly (EGP) II, a soft wearable robot for the hand with glove that is completely constructed of polymer materials and operates through tendon-driven actuation use in spinal cord injury (SCI). EGP II can restore ability to pinch grasp any object people SCI daily life. The design allows it be compact extends range sizes fit. A passive thumb structure was developed oppose improved grasping. To increase robustness glove, designed have minimal number components...

Abstract Oil sorption capacities of various natural and man‐made fibrous sorbents were compared in a simulated seawater bath containing oil. Natural such as milkweed, kapok, cotton, wool showed higher than polyester, polypropylene, viscose rayon, nylon 6, 66, acetate. Sorption the over 30 g oil/g fiber. No definite advantages observed using bicomponent biconstituent fibers regular with respect to their capacity. Analyses mechanisms an environmental scanning electron microscope revealed that...

We examined partial or complete replacement of synthetic sorbents by cotton- containing nonwovens for use in oil spill cleanup. The results indicate that with light crude oil, sorption capacities the needlepunched cotton-containing were slightly greater than those made from 100% polypropylene fibers. If necessary, a small portion fiber could be incorporated into to increase mechanical strength properties and maintain fabric integrity. reusable after simple compression remove oil. They also...

Neurotechnology attempts to develop supernumerary limbs, but can the human brain deal with complexity control an extra limb and yield advantages from it? Here, we analyzed neuromechanics manipulation abilities of two polydactyly subjects who each possess six fingers on their hands. Anatomical MRI finger (SF) revealed that it is actuated by muscles nerves, fMRI identified a distinct cortical representation SF. In both subjects, SF was able move independently other fingers. Polydactyly were...

Constraint-induced movement therapy (CIMT) is an effective recovery protocol for patients with stroke. However, not all the stroke can participate in CIMT. Devices that assist of affected side could help increase number who CIMT like protocol. In this letter, a soft cable-driven wrist-wearable robot called ExoWrist, which assists wrist paretic arm performing dart-throwing motion (DTM) active forearm anchor, proposed. To force transmission efficiency while preventing medical issues due to...

Growing evidence suggests that on-pathway amyloid-β (Aβ) oligomers are primary neurotoxic species and have a direct correlation with the onset of Alzheimer's disease (AD). One promising therapeutic strategy to block AD progression is reduce levels these Aβ using small molecules. While several compounds been shown modulate aggregation, such activity combined safety high blood-brain barrier (BBB) permeability yet be reported. Brilliant Blue G (BBG) close structural analogue U.S. Food Drug...

A quaternary ammonium derivative of chitosan, N-(2-hydroxy)propyl-3-trimethy lammonium chitosan chloride (HTCC), is synthesized as an antimicrobial finish for cotton using a reaction glycidyltrimethylammonium (GTMAC) and chitosan. Results indicate that the degree substitution (DS) in HTCC calculated by content function temperature mole ratio GTMAC NH 2 Excess amounts are generally needed to obtain water-soluble fraction HTCC. minimum DS 0.6 yield Syn thesized analyzed FTIR, H 1 -NMR, TGA,...

Soft robotics is gaining interest in rehabilitation applications, bringing new opportunities to offset the loss of upper limb motor function following neurological, neuromuscular, or traumatic injuries. Unlike conventional rigid robotics, added softness linkages joints promises make robots compliant, which translates into higher levels safety, comfort, usability, and portability, opening door for these technologies be used daily life. While several reviews documented different technical...

In daily living, people grasp an object through the steps of "pre-shaping" and "enclosing," with thumb playing a crucial role its multiple degrees freedom. When assisting individuals hand impairments using soft wearable robots, it is important to simplify robot by reducing number actuators provide different grasping strategies based on various objects being handled. this article, we propose tendon-driven robot, Exo-Glove Poly III, that uses single actuator for two types impairment. To move...

Abstract This study investigates a partial or complete replacement of synthetic sorbents by various biodegradable, natural sorbent materials. The examined are cotton, milkweed, kapok, wool, and kenaf fibers. It was found that (with the exception kenaf) oil sorption capacities these (as loose fiber forms) were much greater than polypropylene. Nonwoven pads prepared using cotton polypropylene fibers their compared. results indicate for light crude oil, needlepunched cotton‐containing slightly...

ABSTRACT An acidophilic, sulfur‐oxidizing Acidithiobacillus thiooxidans MET bacterium was isolated from anaerobically digested, dewatered sewage sludge. This showed ability at both acidic and neutral conditions, allowed metal leaching even a high (130 g L −1 ) sludge solids concentration. We found that low efficiency concentration mainly due to an increase in buffering capacity resulting retardation of pH reduction. Therefore, influenced not by concentration, but the (or sulfate per unit...

Deacetylated chitins (10.7–67.2%) were prepared by alkaline hydrolysis to determine an optimal degree of deacetylation (DD) which can effectively remove four dyes and chromium ions from textile effluent. Sorption isotherms carried varying the treatment time, pH, initial concentration or ions. Experimental results analyzed in three ways: (1) equilibrium sorption capacity rate constant, (2) Langmuir isotherms, (3) separation factor. Results indicated that except for chitin with a 67.2% DD, dye...

A new concept in polycarboxylic crosslinking agents for cellulose is introduced using olefinically unsaturated dicarboxylic acids, maleic acid (MA), and itaconic (IA). In contrast to previous studies involving acids containing at least three carboxylic groups per molecule, we found that the monomers can be effective cross-linking when they are applied presence of a free radical initiator an esterification catalyst. The results demonstrate system 1:1 mole ratio MA IA substantially increases...

Comparison was made for glyoxal- and glutaraldehyde-treated cotton fabrics. Crosslinking efficiency between cellulose dialdehyde measured by wrinkle recovery angle higher with glutaraldehyde than glyoxal. This disparity presumably due to different forms of two dialdehydes in aqueous solution that were confirmed FTIR UV-visible spectroscopies. Such difference hydrated along easy formation oligomeric polymeric glyoxal could influence on sorption reactivity the cellulose. Staining water...

Soft wearable hand robots with tendon-sheath mechanisms are being actively developed to assist people lost mobility. For these robots, accurately estimating fingertip forces leads successful object grasping. An approach can utilize information from actuators assuming quasi-static environments. However, non-linearity and hysteresis regards the dynamic changes of mechanism hinder accurate force estimation. This paper proposes a learning-based method estimate by integrating motor encoders, wire...

We present an exoskeletal haptic device called SKK Hand Master. The is semi-directly driven by linkages with ultrasonic motors, which has characteristic features close to cybernetic actuators. In the control of device, we propose a method measuring joint positions and torques finger PWM/PS presented overcome intrinsic disadvantages motors such as hysteresis. Construction addressed several results experiments for performance evaluation are included.

Accurately detecting multiple simultaneous touches is crucial for various applications using piezoresistance sensor arrays. However, calibrating them difficult due to their nonlinearity and hysteresis. While data-driven deep learning approaches could model complex patterns, the required amount of labeled data increases exponentially as number contact points or subelements increases. In this letter, we propose a novel supervised framework, Local Message Passing Network, that only needs single...

In place of the phosphorus-containing catalysts normally required in 1,2,3,4-bu tanetetracarboxylic acid (BTCA) treatment cotton, aromatic N-heterocyclic com pounds were used to accelerate formaldehyde-free durable press finishing. Imidazole and its derivatives with alkyl groups various positions effective for esterification reaction BTCA cellulose. Such improved retention mechanical properties treated fabric relative results sodium hypo phosphite at similar ratings wrinkle recovery angles....