We present a detailed study of KIC 2306740, an eccentric double-lined eclipsing binary system. Kepler satellite data were combined with spectroscopic obtained the 4.2 m William Herschel Telescope (WHT). This allowed us to determine precise orbital and physical parameters this relatively long period (P=10.3 d) slightly eccentric, ($e=0.3$) The have been determined as $M_1 = 1.194\pm0.008$ M$_{\o...

french revolution was a starting point for the emergence of concepts such as secular and laic. although most of the people in iran and arab countries consider them equivalent, purpose and lexical roots of these two should make a distinction between them. abuse or overuse of these terms by marxist, socialist, liberal, ond other movements has resulted in a misunderstanding of them and consequentl...

the projection strucrure is vibrated by the dynamic effects of the projectile in the inital stahes before seperation. this induces two major results, one is the calculation of stresses obtained decause of bib ration in order to design the launcher and other one which. is bery important, is the determinaion of initial condirions of the nissile prijection at the time of fron the launcher. these c...

Objectives: As we known that the internal thoracic artery (ITA) has an excellent patency rate in coronary artery bypass grafting (CABG). However, early graft failure due to occlusion and spasm is still the major problem after coronary artery bypass surgery. We examined histopathologic findings of the clipped internal thoracic artery (ITA) in patients undergoing CABG using transmission electron ...