introduction: among the components of the extracellular matrix (ecm) and basement membrane (bm), laminitis heterotrimeric glycoprotein (laminin) and collagen type iv are the most important. in a previous study we have examined the role of collagen type iv in the developing lens capsule. the present study aims to determine the appearance and distribution of laminin in the bm and ecm of lenses du...

In this paper, the optimal Fresnel lenses are designed by Zemax software.The fundamental problem of the Fresnel lenses is the beam divergence, which wasresolved by decreeing the output stain diameter on the image plane. For this purpose,two types of radial and cylindrical Fresnel lenses are simulated with different groovesusing Global and Hammer optimization methods. The minimum output stain di...

Sand dripping in 1 dimensional Sand Pile Model is rst studied. Patterns and signals appear. Their behaviors and interactions are explained and asymptotic approximations are made. The total collapsing time of a single stack of sand is linear in function of the number of grains.

PURPOSE To evaluate the efficacy of two silicone hydrogel (SiH) contact lenses, approved for continuous wear for one week, following photorefractive keratectomy (PRK). METHODS Forty seven myopic patients (94 eyes) undergone bilateral PRK were enrolled in this prospective, double-masked, comparative study. One eye of each patient was fitted with a Lotrafilcon B lens (Ciba Vision, Duluth, US; 3...

The results of a comprehensive pile load-test program and observations from field monitoring of helical piles with either a single helix or double helixes installed in oil sand are presented in this paper. Eleven full-scale pile load tests were carried out including axial compression, uplift, and lateral load tests. The results of the full-scale load tests are used to develop a theoretical desi...

A method for designing double aspheric lenses enabling minimal Fresnel losses in the class of stigmatic is considered. Minimization provided by ensuring equal ray-deviation angles on both surfaces lens. The design lens reduced to integration an explicit ordinary differential equation. Simple analytical approximations profiles are also presented.

By a recent result on subperiodic trigonometric Gaussian quadrature, we construct a cubature formula of algebraic degree of exactness n on planar circular lenses (intersection of two overlapping disks) and “double bubbles” (union of two overlapping disks), with n2/2+O(n) nodes. An application is shown to RBF projection methods. 2000 AMS subject classification: 65D32.

This study focuses on the geological model of sandstone formations and petrophysical characterization hydrocarbon reservoirs in Termit Basin. The specific objectives are: (1) to establish a visualizing geometry reservoir rocks (2) visualize spatial vertical distribution parameters (porosity, permeability). methodological approach integrated interpretation lithology data petrographic from logs b...

We previously found that lenses lacking the Acvr1 gene, which encodes a bone morphogenetic protein (BMP) receptor, had abnormal proliferation and cell death in epithelial and cortical fiber cells. We tested whether the tumor suppressor protein p53 (encoded by Trp53) affected this phenotype. Acvr1 conditional knockout (Acvr1(CKO)) mouse fiber cells had increased numbers of nuclei that stained fo...