We extend the common theme of random Apollonian packing of circles to consider orientable grains with a noncircular shape. Systems of up to 10(6) grains are examined for a range of polygonal and elliptical shapes using both the random Apollonian packing model and the new rotational random Apollonian packing model which takes into account the extra rotational degree of freedom of noncircular gra...

The aim of this research was to describe the effects of altering the composition of a modified remineralizing agent (MRA) and the osmotic pressure on tooth color by using spectrophotometric analysis. One hundred and four (104) human premolars and molars were randomly divided into 2 groups of 52 specimens each. Group 1 was treated with the remineralizing agent MRA 55, (remineralizing agent 1), a...

Cube-shaped PZT single crystals with PZ/PT=55/45 composition were grown in a relatively uniform size distribution around 80μm by a PbO-flux method. The PZT grains obtained were mixed with liquid polyimide resin and rolled on a glass plate to fabricate 1-3-type composite sheet. This rolling process resulted in a high orientation of the PZT grains as the {h00} are parallel to the substrate plane....

The radiative torque (RAT) alignment of interstellar grains with ordinary paramagnetic susceptibilities has been supported by earlier studies. The alignment of such grains depends on the so-called RAT parameter q that is determined by the grain shape. In this paper, we elaborate our model of RAT alignment for grains with enhanced magnetic susceptibility due to iron inclusions, such that RAT ali...

Do online shopping advertorials for whitening skincare products in South Korea perpetuate a racial hierarchy wherein whiteness is maintained as an ideal beauty standard? If so, how this articulated and reinforced with words images? Whitening products, such tone-up creams sunscreens, have become increasingly prevalent the industry Korea. Adding level of nuance to earlier research, my research un...

introduction: health care is one of the most important sectors in the development of each country and disparities in their distribution will reduce the level of development. the aim of this study was to examine the access to healthcare and degree of development in health care resources in the west of iran in 2011. method: this was a cross-sectional and retrospective study. the study setting was...

It is well known that the optimal concentration of fluorescent whitening agent (FWA) in bath results high whiteness single component textiles. At same time, due to fluorescence FWA, higher UV protection achieved as well. However, for textile blends it not so easy achieve. Depending on fabric chemical composition, different FWAs must be applied. Therefore, influence FWA constitution and cotton c...