purpose: to determine peripapillary retinal nerve fiber layer (rnfl) thickness by three-dimensional optical coherence tomography (3d-oct) in a normal iranian population and to evaluate the concordance of these measurements with those obtained by the second generation of optical coherence tomography (oct ii). methods: in a cross-sectional observational study, 96 normal iranian subjects 20-53 yea...

background: many studies have been carried out to understand the effect of endometrial thickness on the reproductive outcome while the factors affecting the pattern itself are still unknown. objective: to determine the factors such as age and the number of follicles that could affect the endometrial thickness materials and methods: this study was conducted as a retrospective study on 680 infert...

We determine the order of growth of the worst-case number of perfect subgraphs needed to cover an n-vertex graph.

Since the landmark study by Spaide and colleagues on the development of enhanced depth imaging by optical coherence tomography, an increasing number of studies have addressed choroidal thickness in normal eyes, factors associated with choroidal thickness in normal eyes, and associations of choroidal thickness with various retinal and retinochoroidal disorders. These studies have revealed that m...

Besides normal aging, a number of brain diseases are known to reduce the amount of grey matter in the brain. To better understand the nature and progression of these disease processes, quantitative measurements of relevant brain structures, such as the regional cortical thickness, are highly desirable. Starting from high resolution volumetric MR images of the human head, a reliable segmentation...

Briefly, a feather is a semigroup derivation diagram with the labels on the edges removed. In this paper, we are concerned with possible definitions for the thickness of a feather. A major open problem is whether the word problem is solvable for semigroup presentations with one defining relation. It is known that word problems for semigroup presentations are solvable if the number of regions in...

Background: Despite recent technical improvement in assisted reproductive techniques (ART), the implantation rate per embryo still remains low (15%). The aim of the study is to determine whether the failure of IVF cycle is associated with endometrial thickness on the day of HCG (human chorionic gonadotropin) administration. Materials and Methods: Endometrial thickness of two hundred and seven p...