PURPOSE The purpose of this study was to identify the relationship between aniseikonia scores in the vertical and horizontal meridians and the foveal microstructure on vertical and horizontal spectral-domain optical coherence tomography (SD-OCT) in patients with idiopathic epiretinal membrane (ERM). METHODS All patients (n = 65) with unilateral ERM were examined, and the aniseikonia scores in...

Noise measurements were carried out in the Cologne area (Germany), and the resonance frequency of each site was estimated from the main peak in the spectral ratio between the horizontal and vertical component. For 32 of these sites, the thickness of the sedimentary cover was known from boreholes, and a clear correlation between resonance frequency and sediment thickness was observed. A formula ...

Joint inversion of horizontal-to-vertical spectral ratios (HVSRs) and dispersion curves (DCs) from seismic noise recordings has been extensively used to overcome the lack uniqueness in noise-based HVSR (NHV) or DC inversions alone. Earthquake contain information about structural properties sedimentary layers provide body-wave data complementary estimate site velocity structures, particularly hi...

by growing the population and need for settlement, many cities have been built on soft sediments and seismic areas. it emphasizes the need for a careful and reliable assessment of site effect phenomena. beyond the methods of studying site effects, microtremor recordings has become popular over the last decades as it offers a convenient, practical and low cost tool to be used in urbanized areas....

We investigated the validity of seismic site response characteristics estimated from microtremors by comparing them with those of earthquake motions. For this purpose we observed microtremors as well as earthquake motions using large (5-km diameter) and small (0.5-km diameter) arrays deployed on soft sediments. Specifically, we examined four estimates from microtremors: relative site amplificat...