This work is devoted to diffusion mechanisms in low-density fiberboard (255 kg m?3). Experiments were performed under unsteady state conditions (relative humidity step from 37% 71%) with different thicknesses (half thickness ranging 1 mm 20 mm). The mass diffusivity was determined by inverse analysis the experimental moisture content evolution, using a comprehensive macroscopic model of coupled...

This paper discusses the results obtained from experiments using specially prepared carbon grids on top of metallic substrates and subsequent treatment of the data by means of a theoretical approach which is based on the conventional fundamental parameter theory but also includes secondary excitation effects by photoelectrons. Carbon gridlines with known parameters have been deposited on top of...

This study aimed to evaluate Laser-cutting process of Mild Steel St37 sheets with two different thicknesses. In order to evaluate the quality of cutting edge and the depth of the area affected by the heat, several tests were conducted to determine the effect of parameters such as Laser power, Laser beam movement speed and pressure of axillary gas on the quality of cutting edge and the depth of ...

Abstract Patterning using a focused ionizing radiation beam provides high spatial resolution but is not feasible when creating large arrays of microstructures. We propose the optimization x-ray lithography parameters to create submicropores in low-sensitivity material (polyethylene terephthalate) wide beam. This results fabrication regularly arranged micropores with aspect ratio (over 20) and d...

In hot dip galvanizing, several parameters such as chemical composition of coating bath, immersion time and surface roughness of specimens could affect microstructure and properties of coating. In this article, the effect of aluminum content, immersion time and surface roughness on structure and properties of alloy layers have been investigated. Specimens of low carbon silicon-free steel with d...

PURPOSE This study was designed to identify possible differences between healthy subjects and patients with primary open-angle glaucoma (POAG) in keratometry, central corneal thickness, overall corneal thickness, mean thickness of a circular zone centered at the corneal apex of 1-mm radius (zone I), and mean thickness of several concentric rings also centered at the apex of 1-mm width (zones II...

Comparison of ice discharge from higher elevation areas of the entire Greenland Ice Sheet with total snow accumulation gives estimates of ice thickening rates over the past few decades. On average, the region has been in balance, but with thickening of 21 centimeters per year in the southwest and thinning of 30 centimeters per year in the southeast. The north of the ice sheet shows less variabi...

The computation of symmetry-breaking bifurcation points of nonlinear multiparameter problems with Z2 (reflectional) symmetry is considered. The numerical approach is based on recent work in singularity theory, which is used to construct systems of equations and inequalities characterising various types of symmetry-breaking bifurcation points. Numerical continuation methods are then used to foll...

Periodic bifurcation modes that occur in ductile multilayered plates or sheets stretched in plane strain tension are analyzed to reveal whether necks are likely to localize at the scale of the thickness of individual layers or at the scale of the full thickness of the multilayer. The energy dissipated in tearing a ductile multilayer scales with the extent of the localized thinning region in the...