We have simulated the effect of sidewall roughness in photonic-crystallike structures with different vertical refractive-index contrast. We treated the scattering off a sidewall irregularity as a radiating dipole excited by the incident waveguide mode. We show that the loss that is due to this scattering is significantly larger for structures with a low refractive-index contrast (such as GaAs/A...

We compare four different model geometries for particles with small-scale surface roughness. The geometries are based on regular and stochastic surface perturbations, as well as on 2Dand 3D-roughness models. We further compare T-matrix and discrete dipole computations. Particle size parameters of 5 and 50 are considered, as well as refractive indices of 1.6+0.0005i and 3+0.1i. The effect of sma...

Samaun Pulubuhu Street - Boliohuto Huidu A.K. Luneto is one of the roads connecting Gorontalo City, Djalaludin Airport, and surrounding districts in Province. This study aims to compare value road conditions based on PCI IRI methods determine alternative treatments.This uses Pavement Condition Index (PCI) International Roughness. (IRI) methods. The obtained through a direct visual survey condit...

BACKGROUND Laryngopharyngeal reflux is a prevalent, not well-understood disease affecting a high proportion of patients who seek laryngology consultation. The objective of this prospective case series is to explore the subjective and objective voice modifications in Laryngopharyngeal reflux (LPR), especially the usefulness of acoustic parameters as treatment outcomes, and to better understand t...

The International Roughness Index (IRI)'s survey is a longitudinal profile to determine of road. purpose this provide an overview road conditions and input in optimizing the maintenance rehabilitation existing roads city Palangka Raya. data used for analysis IRI’s from surveys on several that represent Raya City with RoadLabPro application car. results showed Beruk Angis had average IRI value 9...

In the present work we have investigated the relationships existing between the optical properties and the growth mechanism, microstructure and surface roughness of SnO2 and ZnO oxide films prepared by magnetron sputtering under conditions resembling those utilized in industry. Thin films of these oxides with different thicknesses were characterized by atomic force microscopy, glancing incidenc...

Hot-in-place recycling of asphalt pavement is one the important regeneration technologies engineering, which apply to pavements with fewer diseases, excellent driving quality, slight rutting, and good structural strength. However, surface layer some road sections was aging, penetration index aged at 25°C lower than 20(0.1mm), does not meet recommended requirements criterion in China. In 2019, 3...

Most land surface models require information on aerodynamic roughness length and its temporal and spatial variability. This research presents a practical approach for determining the aerodynamic roughness length at fine temporal and spatial resolution over the landscape by combining remote sensing and ground measurements. The basic framework of Raupach, with the bulk surface parameters redefine...

We desire to quantitatively characterize the effect surface roughness has on extreme ultraviolet radiation. This was done by taking the ratio of the reflectance of a surface with random roughness and the reflectance from a perfectly smooth surface of the same composition and size. The reflectance was calculated by numerically solving the exact integral equations for the electric and magnetic fi...