background: the aim of this study was to detect prognostic factors in recurrent breast cancer metastasis. materials and methods: th is retrospective cohort study employed data from 996 breast cancer patients of isfahan seyed-o-shohada research center from 1998 to 2010. stratifi ed cox proportional hazards model, marginal approach, was used to evaluate the prognostic value of estrogen receptor, ...

This paper presents a fatigue life prediction model of post-impacted sheets considering the effects dent size and stress ratio. Low-velocity impact tests at four different energies were performed on specimens cut from 2524-T3 7075-T62 aluminium alloy. Following tests, static tensile uni-axial constant amplitude block spectrum experiments conducted. Numerical models generated to determine initia...

We prove the existence of immersed closed curves constant geodesic curvature in an arbitrary Riemannian 2-sphere for almost every prescribed curvature. To achieve this, we develop a min-max scheme weighted length functional.

High-resolution nuclear-to-outer rotation curves for Sb, SBb, Sc, and SBc galaxies show generally a steep nuclear rise and flat rotation from the disk to halo. The high-velocity central rotation indicates massive core within bulges. Since this characteristics is common to most galaxies, the highvelocity central rotation cannot be due to a particular orientation of non-circular motion. Using the...