application of structures of flow pattern modification is one of the erosion control methods in bends. triangular vanes are among these structures which provide less scour depth compared to the other techniques such as spur dike. since little information on erosion and sedimentation pattern around triangular vanes are available, this study was conducted to study the effect of structure effectiv...

The first results of the observational program of the study of 2D-kinematics in double-barred galaxies are presented. We show that, for the main part of the sample, the inner bars do not affect the circumnu-clear stellar kinematics. Therefore, they are not dynamically decoupled structures. Various types of non-circular gas motion were found in many galaxies. The analysis of the ground-based and...

The first results of the observational program of the study of 2D-kinematics in double-barred galaxies are presented. We show that, for the main part of the sample, the inner bars do not affect the circumnu-clear stellar kinematics. Therefore, they are not dynamically decoupled structures. Various types of non-circular gas motion were found in many galaxies. The analysis of the ground-based and...

Critical insights on galaxy evolution stem from the study of bars. With the advent of high redshiftHST surveys that trace bars in the rest-frame optical band out to z ∼ 1, it becomes increasingly important to provide a reference baseline for bars at z ∼ 0 in the optical band. We present results on bars at z ∼ 0 in the optical and near-infrared bands, based on 180 spirals in the OSUBSGS survey. ...

Inguinal hernia repairs are among the most frequent operations performed worldwide. This study aims to provide further understanding of structural characteristics of hernia prostheses, and better comprehensive evaluation. Weight, porosity, pore size and other physical characteristics were evaluated; warp knitting structures were thoroughly discussed. Two methods referring to ISO 7198:1998, i.e....

We report new radio continuum observations with an angular resolution of 2 ′′ .1 at 1.4 GHz (20 cm) and 0 ′′ .28 at 8.4 GHz (3.6 cm), of the barred galaxy NGC 3367. In the map at 1.4 GHz, the central nuclear region connects to the SW lobe, with a projected structure of at a position angle of P.A.∼ 230 • , forming a jet-like structure. The map at 8.4 GHz shows a compact unresolved source (smalle...

NGC 2915 is a blue compact dwarf galaxy embedded in an extended, low surface brightness H I disk exhibiting a two-armed spiral structure and a central bar-like component. Commonly accepted mechanisms are unable to explain the existence of these patterns and Bureau et al. proposed disk dark matter (scaling with the H I distribution) or a rotating triaxial dark halo as alternative solutions. In a...

A sinusoidal grating can be viewed as a series of light and dark bars. Here we measure the contrast discrimination thresholds for light and dark bars individually, and find that the contrast discrimination thresholds for the whole sinusoid can be explained as ideal summation of the light and dark bar thresholds. We propose a model for light bar, dark bar, and sinusoidal contrast discrimination ...

ESO 566-24 is an extraordinary barred galaxy, which has four regularly spaced spiral arms in blue light images. This type of four-armed spiral structure, which is rare among the spiral population, is clearly seen also in near-infrared images, and thus is present in the old stellar population. We have constructed dynamical models of ESO 566-24 in order to understand the cause of its four-armed s...