In this study, we have successfully fabricated electrospun polystyrene (PS) nanofibers having a diameter of 326 ± 50 nm with a parallel grooved texture using a mixed solvent of tetrahydrofuran (THF) and N,N-dimethylformamide (DMF). We discovered that solvent system, solution concentration, and relative humidity were the three key factors to the formation of grooved texture and the diameter of n...

The effect of an artificially-enhanced rough surface on the secondary electron emission yield (SEY) was investigated both theoretically and experimentally. Analytical studies on triangular and rectangular grooved surfaces show the connection between the characteristic parameters of a given geometry to the SEY reduction. The effect of a strong magnetic field is also discussed. SEY of grooved sam...

Introduction: Two thirds of the surface of Ganymede is covered by grooved terrain, suggesting an active history of extensional tectonics. One important piece of Ganymede geological history is to determine the order in which groove-forming events happened. Separating grooves into a time sequence will help to constrain the geological events that formed the grooves. Previous investigations into th...

High-resolution Galileo images of grooved terrain on GanGrooved terrain covers over half of Ganymede’s surface ymede have revealed details of the morphology of grooves and their stratigraphic relationships. Based on lower resolution and records a period of intense surface deformation at Voyager images, complex areas of grooved terrain in Uruk some point in the satellite’s history. Ganymede’s ne...

Through a simple analytical description we quantify how pressure-driven flows over grooved surfaces develop transverse components, which, for shallow grooves, can be modeled with simple anisotropic effective boundary conditions. Helical recirculation results in channels or capillaries with grooved walls. An experimental validation of our model is presented. Our analysis provides a workable guid...

Abstract To enhance the heat transfer efficiency of spiral wound exchanger, a grooved exchanger (GSWHE) was proposed. A test platform accomplished to experimentally investigate performance with comparison (SWHE). The uncertainty analysis experiment conducted, maximum relative error being not more than ±5%. comprehensive coefficient GSWHE is higher that SWHE when cooling water flow rate low. det...

Two-dimensional Navier-Stokes simulations of heat and momentum transport in an intermittently grooved passage are performed using the spectral element technique for the Reynolds number range 600<Re<1800. The computational domain has seven contiguous transverse grooves cut symmetrically into opposite walls, followed by a flat section with the same length. Periodic inflow/outflow boundary conditi...

BACKGROUND Surface characters of culture plates affect cellular behaviors such as cellular alignment and elongation. Microgrooves guide the cell growth along the grooves and spread. The aim of this study was to observe the effect of fibronectin (FN)-coated micro-grooved titanium plates on the alignment, spread, adhesion, and proliferation of human gingival fibroblasts (HGFs). MATERIAL AND METHO...

A flexible microdome-grooved Gd(2)O(2)S:Tb scintillator is simulated, fabricated, and characterized for digital radiography applications. According to Monte Carlo simulation results, the dome-grooved structure has a high spatial resolution, which is verified by X-ray image performance of the scintillator. The proposed scintillator has lower X-ray sensitivity than a nonstructured scintillator bu...