Background: The description on patients with pigmented back patches is rarely reported in the literature. We decided to study the clinicopathological aspects of these patients for reaching a better understanding of this disease.Method: In this study, the clinicopathological aspects and probable responsible factors in the manifestation of posterior pruritic pigmented patches in patients referred...

In the article number 2001492, Papada Natsathaporn and Daniel Crespy report a new “patch-and-heal” strategy for repairing small cracks on materials surface. Healing nanofibrous patches containing either photoinitiator or catalyst are prepared by electrospinning. After impregnation of with monomers, can be covered repaired under UV irradiation thermal treatment.

This study was conducted to evaluate the effect of copper extraction on the structure and function of rangelands ecosystem around the mine area in Dareh Zereshk, Yazd province, Iran. Three study sites were considered at the specified intervals of the mine (0-200, 200-500 and 500-1000m). This research was conducted from 2012 to 2013. In each location, three linear transects with a length of 50 m...

We define a toric surface patch associated with a convex polygon, which has vertices with integer coordinates. This rational surface patch naturally generalizes classical Bézier surfaces. Several features of toric patches are considered: affine invariance, convex hull property, boundary curves, implicit degree and singular points. The method of subdivision into tensor product surfaces is introd...

Given the present obsession with pattern formation, it is hard to appreciate that 30 years ago there were but few eccentrics who knew what the words meant. In those days, any who tried to understand patterns searched throughout zoology and botany for colleagues who shared their interest. Topics of research included the spacing of hairs on sheep or of stomata in plants, and the orientation of in...

We present a new approach to finding ray–patch intersections with triangular Bernstein–Bézier patches of arbitrary degree. This paper extends and complements on the short presentation 17. Unlike a previous approach which was based on a combination of hierarchical subdivision and a Newton–like iteration scheme 21, this work adapts the concept of Bézier clipping to the triangular domain. The prob...

Wachspress quadrilateral patches have been recently studied from the point of view of applications to surface modelling in CAGD [1], [3], [4]. Some more applications for defining barycentric coordinates for arbitrary polygons have also been presented in [5] [9]. The purpose of the present paper is to introduce non-negative Wachspress rational basis functions for surface modelling on pentagonal ...

SUMMARY Solving boundary value problems with optimal eeciency requires adaptivity and multilevel techniques. In 7] an implementation of the AFACx algorithm (cf. 9]) is presented that is based on rectangular cartesian grids. This implementation does not allow for overlap of grids that lie on the same level of reenement. We investigate the case where these grids can overlap. A standard technique ...

background: recurrent aphthous stomatitis (ras) is the most common painful ulcers of oral mucosal which can cause many sufferings. treatment of ras often includes administration of corticosteroids, analgesics and regulators of the immune system. however, considering the side effects of these medications, even their topical application must be done with caution. alum is used in traditional medic...