We determine the time- and force-dependent viscoelastic responses of reconstituted networks of microtubules that have been strongly crosslinked by biotin-streptavidin bonds. To measure the microscale viscoelasticity of such networks, we use a magnetic tweezers device to apply localized forces. At short time scales, the networks respond nonlinearly to applied force, with stiffening at small forc...

Rapid prototyping (RP) refers to a class of technology that can automatically construct the physical models from computer aided design (CAD) data. Fused deposition modeling is one of the RP process that produced prototype from plastic material by lying track of semi molten plastic filament on to a platform in a layer wise manner from bottom to top. The quality of FDM made parts are highly depen...

The possibility of obtaining a filament for 3D printing from plastic bottles based on polyethylene terephthalate is investigated. A preliminary heat treatment the material proposed, which allows powder with minimal energy consumption dispersion. temperature regime processing an extrusion line single-screw extruder subsequent cooling melt before winding coils determined. Comparative strength tes...

Despite the lack of a clearly defined physiological function, airway smooth muscle receives substantial attention because of its involvement in the pathogenesis of asthma. Recent investigations have turned to the ways in which the muscle is influenced by its dynamic microenvironment. Ordinarily, airway smooth muscle presents little problem, even when maximally activated, because unending mechan...

We study the instability to necking of an initially cylindrical filament of soft glassy material subject to extensional stretching. By numerical simulation of the soft glassy rheology model and a simplified fluidity model, and by analytical predictions within a highly generic toy description, we show that the mode of instability is set by the age of the sample relative to the inverse of the app...

Abstract FFF (Fused Filament Fabrication) prototyping method is mostly used in the fabrication of 3D complex geometric shapes. Layer by layer deposition technology offers a wide range shapes for plastic parts. The mechanical characteristics manufactured parts depends on material and printing parameters. studies conducted this paper show influence parameters tensile properties ABS (Acrylonitrile...

This paper mainly presents the simulation and design of adaptive control scheme for filament winding automatic control system. According to the model reference adaptive control principle, an algorithm of fuzzy immune PID is adopted, which is suitable for the velocity and position servo system control. The simulation results show the controller design is practical, and not only has achieved fine...

3D printers are usually used for printing objects designed by 3D CAD exactly, i.e., deterministically. However, 3D printing process contains stochastic self-organization process that generate emergent patterns. A method for generating fully self-organized patterns using a fused deposition modeling (FDM) 3D printer has been developed. Melted plastic filament is extruded constantly in this method...

A two-dimensional, particle-based biofilm model coupled with mass transport and computational fluid dynamics was developed to simulate autotrophic denitrification in a spiral-wound membrane biofilm reactor (MBfR), where hydrogen is supplied via hollow-fiber membrane fabric. The spiral-wound configuration consists of alternating layers of plastic spacer net and membrane fabric that create rows o...