Polyvinyl alcohol (PVA) hydrogels have been proposed for use as promising biomaterials in biomedical and tissue engineering but their poor mechanical water-retention properties hindered development. Graphene oxide (GO), an excellent nanofiller, was added to PVA make GO/PVA composite by a freeze/thaw method. The of the were significantly improved. Compared pure hydrogels, 132% increase tensile strength 36% improvement compressive achieved with addition 0.8 wt% GO, which suggests load transfer...

Thrusters are the bottom actuators of amphibious spherical robot, and play an important role in motion control these robots. To realize accurate control, a thrust model for new water-jet thruster based on hydrodynamic analyses is proposed this paper. First, characteristics were numerically analyzed using computational fluid dynamics (CFD) commercial software CFX. The moving reference frame (MRF) technique was utilized to simulate propeller rotation. In particular, hydrodynamics studied not...

Peanut pod rot is one of the major plant diseases affecting peanut production and quality over China, which causes large productivity losses challenging to control. To improve disease resistance peanuts, breeding significant strategy. Crucial preventative management measures include grading screening high-contributed genes that are highly resistant should be carried out. A machine vision-based approach for individual cases was proposed in this study, avoids time-consuming, labor-intensive,...

With the continuous upgrading of aerospace equipment, power density requirements for aviation pumps are also increasing. For increasing density, raising rotational speed pump is a valid method. But under condition high speed, fluids switches between high- and low-pressure may cause gaseous cavitation, vibrations, noise. Many research proposed enhancing inlet pressure to decrease but it needs additional facility will pump. Through changing end orientation optimizing area, this paper put...

This paper analyzes climate change impact on crop yield of winter wheat, a main in the water-stressed Haihe River Basin North China. An integrated analysis was carried out by coupling World Food Studies (WOFOST) growth model and distributed hydrological describing water energy transfer processes large river basins (WEP-L). Various spatial technologies, including remote sensing geographical information system, were woven together to support calibration validation. The WOFOST calibrated...

With the aim of finding a low-cost, safe, and reliable way to reduce costs space launch, maglev launch assist vehicle (Maglifter) is proposed. We present permanent magnet–high temperature superconductor (PM-HTS) interaction system for Maglifter, which consists cryostat with multi-block YBaCuO bulks flux-collecting PM guideway. obtain an optimum bulk arrangement by measuring analysing typical locations HTSs above also measure levitation abilities at different field cooled heights (FCHs)...

A three-part numerical investigation has been conducted in order to identify the flow separation behavior—the progression of shock structure, pattern with an increase nozzle pressure ratio (NPR), prediction data on wall, and influence gas density effect behavior are included. The computational results reveal that annular conical aerospike is dominated by shock/shock shock/boundary layer interactions at all calculated NPRs, physics associated quite complex. An abnormal as well a transition...

A two-temperature thermal and chemical nonequilibrium model is developed applied to investigate the expansion processes of an argon plasma flow through a Laval nozzle. This describes in self-consistent manner gas heat transfer, coupling electric energy deposited into plasma, reaction kinetics including contribution excited species. It found that far from thermodynamic equilibrium entire process Significant temperature discrepancies between electrons heavy species are cooler outer region. The...

Interleukin-6 (IL-6) overproduction has been considered to contribute inflammatory damage of glomerular mesangial cells (GMCs) in human proliferative glomerulonephritis (MsPGN) and its rat model called Thy-1 nephritis (Thy-1N). However, the regulatory mechanisms IL-6 expression GMCs upon sublytic C5b-9 timulation remain poorly understood. We found that Krüppel-like factor 4 (KLF4) bound promoter (-618 -126 nt) activated gene transcription. Furthermore, lysine residue 224 KLF4 was acetylated...

Abstract A modelling study is performed to investigate the plasma flow through constrictor of medium-power arc-heated thrusters. The Roe scheme employed solve governing equations, which take into account effects compressibility, Joule heating and Lorentz force, as well temperature pressure dependence gas properties. results show that within choked by combined friction arc heating. computed total drop due about twice dynamic head at outlet. current, inlet mass rate, length diameter on...

This paper investigates the temperature rise of vertical/horizontal high-voltage direct current (HVdc) grounding electrodes by simulations and field tests. Based on a field-circuit coupling distribution model three dimensional (3-D) finite element model, comprehensive methodology is proposed to analyze transient rise. Since soil resistivity varies with around electrodes, temperature-dependent tested, then approximated an empirical formula. Moreover, two practical tests are implemented...

Ammonium sulfate has been utilized in agriculture; however, there is a dearth of research on its application maize cultivation subsequent to the implementation nitrification inhibitors or coating. This study aims analyze impacts various combinations ammonium fertilizers soil nutrients, plant nutrient uptake, yield, and fertilizer utilization efficiency ascertain optimal stabilized disposal method for sulfate. A completely randomized design was employed with five treatments (AU, control using...

A radiation-cooled low-power arcjet thruster is tested in order to study the startup characteristics and performancewith nitrogen ammoniamixtures as propellant a vacuumwith chamber pressures lower than 5 Pa. In ignition tests, two different starter circuits, i.e., high-frequency high-voltage pulse techniques, are used initiate discharge. The results of tests show that arc current, electrode temperature, inlet pressure, andmole fraction ammonia have significant effects on characteristics....

As a well-built, distributed hydrological model, the Soil and Water Assessment Tool (SWAT) has rarely been evaluated at small spatial short temporal scales. This study crop growth (specifically, leaf area index shoot dry matter) daily evapotranspiration response unit (HRU) scale, SWAT2009 was modified to accurately simulate processes major processes. The parameters of model were calibrated using data on maize for seed from 5 HRUs validated 7 HRUs. results show that evapotranspiration, matter...