This article explores the concept of external magnetic control for vine robots to enable their high curvature steering and navigation use in endoluminal applications. Vine robots, inspired by natural growth locomotion strategies, present unique shape adaptation capabilities that allow passive deformation around obstacles. However, without additional mechanisms, they lack ability actively select desired direction growth. The principles magnetically steered growing are discussed, experimental...

Abstract Semi‐interpenetrating polymer networks (semi‐IPNs) composed of chitosan and polyacrylamide (PAAm) hydrogels have been prepared, the effect changing pH, temperature, ionic concentration, applied electric fields on swelling was investigated. The kinetics increased rapidly, reaching equilibrium within 60 min. semi‐IPN exhibited a relatively high ratios 385%–569% at T=25°C. ratio with decreasing pH below pH=7 due to dissociation bonds. field dependent. Differential scanning calorimetry...

Abstract Poly(vinyl alcohol) (PVA) was dissolved in the water to make a 10 wt % aqueous solution, and polydimethylsiloxane (PDMS) mixed with 1 2,2‐dimethyl‐2‐phenylacetophenone (DMPAP) 0.5 mol methylenebisacrylamide (MBAAm) isopropyl alcohol. This mixture added PVA solution heated at 90°C for 7 h. Various crosslinked networks were prepared different molar ratios of PVA/PDMS (1:1, 1:3, 3:1). The characterization determined by Fourier transform infrared (FTIR) spectroscopy, differential...

Abstract Copolymers composed of poly(vinyl alcohol) (PVA) and poly(dimethylsiloxane) (PDMS) were crosslinked with chitosan to prepare semi‐interpenetrating polymer network (IPN) hydrogels by an ultraviolet (UV) irradiation method for application as potential biomedical materials. PVA/PDMS copolymer was cast hydrogel films, followed a subsequent crosslinking 2,2‐dimethoxy‐2‐phenylacetophenone nontoxic photoinitiator UV irradiation. Various networks (semi‐IPNs) prepared from different weight...

Soft growing robots have received considerable attention because of their unique locomotion. However, the use a single material for manufacturing causes numerous problems, each part robot requires different characteristics. This study attempts to solve this fundamental problem from perspective, rather than integrating independent solutions. A hyperelastic is proposed building soft robot. Several problems associated with conventional are addressed using that offers required properties robot,...

Abstract Interpenetrating polymer network (IPN) hydrogels composed of polyallylamine and chitosan were synthesized by radical polymerization using 2,2‐dimethyl‐2‐ phenylacetophenone (DMPAP) methylene bisacrylicamide (MBAAm) as initiator crosslinker, respectively. The IPNs thus obtained characterized Fourier transform infrared (FT‐IR) spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), dielectric (DEA). melting temperatures observed with increasing content...

Abstract Interpenetrating polymer network (IPN) hydrogels based on poly(vinyl alcohol) and 1‐vinyl‐2‐pyrrolidone were prepared by radical polymerization with 2,2‐dimethoxy‐2‐phenylacetophenone as a photoinitiator N , ′‐methylenebisacrylamide crosslinker. The IPN analyzed for the sorption behavior of water at 35°C relative humidity 95% dynamic vapor system, diffusion coefficients calculated. Differential scanning calorimetry was used to quantitatively determine amounts freezing nonfreezing...

Soft growing robots have garnered significant research interest owing to their unique locomotion. However, real-world applications of these are limited by challenges in achieving reversible and repeatable operations, particularly when faced with buckling during retraction. Although a variety retraction mechanisms been developed, many necessitate the installation extra rigid hardware at distal part, compromising inherent benefits soft robots. Existing that maintain advantages tend be...

Over the years, soft growing robots that allow feeding of new materials at their tips have attracted considerable attention owing to unique locomotion characteristics. However, accessing targets over highly curved passages by steering compliant continuum bodies remains challenging. To this end, study proposes a tip mechanism imparts with consecutive high-curvature ability. We place hyper-redundant rolling contact joint and twisted string actuator (TSA) robot provide continuous smaller scale...

A special type of metal hydride (SMH) actuator has been developed and the pressure response inside studied against changing temperature controlled by Peltier elements. The newly SMH is characterized its smaller size, lower weight, noiseless operation, compliance similar to that human bodies. simple actuator, consisting powdered hydrogen-absorbing alloys as a source mechanical power, elements thermal source, cylinder with bellows element, developed. An assembly copper pipes, which good...

Describes a bike system for the postural balance rehabilitation training. A virtual environment and three dimensional graphic models are designed with CAD tools such as 3D Studio Max/sup TM/ World Up/sup TM/. For real time simulation, optimized WTK library is embedded dynamic geometry generation method, multi-thread portal method. In an experiment, 20 normal adults were tested to investigate influencing factors of balancing posture. We evaluated by measuring parameters path deviation,...

A temperature‐ and pH‐responsive interpenetrating polymer network (IPN) hydrogels constructed with polymethacrylic acid (PMAAc) sodium alginate (SA) by sequential IPN method was studied. The characterizations of were investigated fourier transform infra‐red spectroscopy (FT‐IR), differential scanning calorimetry (DSC) swelling tests under various conditions. exhibited a relatively high ratio in the range 183‐916% at 25°C. PMAAc/SA depended on pH, temperature ionic concentration. DSC used for...

In this study, the extent of forest fire damage over time was predicted through numerical simulations for 2022 Uljin-Samcheok fire. Also, area suppressed spread firefighting efforts checked and compared with simulated area. Furthermore, a discussion conducted regarding establishment method containment lines. The simulation results showed that is vulnerable to fires because it composed rugged terrain pine forests. If there had been no response fire, estimated approximately 102.3 km² would...

This paper explores the concept of external magnetic control for vine robots to enable their high curvature steering and navigation use in endoluminal applications. Vine robots, inspired by natural growth locomotion strategies, present unique shape adaptation capabilities that allow passive deformation around obstacles. However, without additional mechanisms, they lack ability actively select desired direction growth. The principles magnetically steered growing are discussed, experimental...

Adding virtual damping to dissipate energy has been a major tool for designing stable haptic interfaces in most passivity-based approaches. However, is known limited amount of energy. It even generates during high-velocity interaction because the digitization effect, such as zero-order hold and quantization. Therefore, no proper dissipation element available stabilize when longer functioning. This paper investigates possibility using inertia complementary interfaces. analyzes behavior...

Interpenetrating polymer network (IPN) hydrogel composed of sodium alginate (SA) and poly(diallyldimethylammonium chloride) (PDADMAC) exhibited electrical-sensitive behavior. The SA/PDADMAC IPN was synthesized using the sequential method. swelling behavior studied by immersion gel in aqueous HCl solutions at various concentrations pHs. stimuli response electric fields also investigated. When swollen placed between a pair electrodes, bending upon application an field. showed stepwise...