Four binaries, 10 UMa, UMa, 81 Cnc, and UMa, were observed with adaptive optics on the 3.5m telescope at the Starrre Optical Range on March 24, 1998, in order to investigate the relative photometry produced by adaptive optics within the isoplanatic patch. Iterative Blind Deconvolution (IBD) and Parametric Blind Deconvolution (PBD) techniques were used to post-process the data, and produced cons...

I review the status of massive star formation theories: accretion from collapsing, massive, turbulent cores; competitive accretion; and stellar collisions. I conclude the observational and theoretical evidence favors the first of these models. I then discuss: the initial conditions of star cluster formation as traced by infrared dark clouds; the cluster formation timescale; and comparison of th...

This thesis is devoted to star formation from galaxy-scales (≈ 10 000 pc) to sub-star cluster-scales (≈ 0.1 pc). I develop and test a new method to derive star formation histories of Galaxies from their star cluster content, in particular the most massive star clusters. This is followed by an application of this method to the Large Magellanic Cloud, where the results of this new method are conf...

The authors present a detailed study of the microscopic parameters, which control the miscibility in binary linear/star polymer blends. The effective interactions of linear/star polymer blends are studied by means of Monte Carlo simulations and comparison is made with linear/linear and star/star blends, which they also determined. Using the bond fluctuation model on a simple cubic lattice, the ...

Starbursts produce large numbers of Young Star Clusters (YSCs). Multi-color photometry in combination with a dedicated SED analysis tool allows to derive ages, metallicities, EB−V, and masses including 1σ uncertainties for individual clusters and, hence, mass functions for YSC systems. The mass function, known to be Gaussian for old Globular Cluster (GC) systems, is still controversial for YSC ...

هدف: پژوهش حاضر با هدف شناسایی پیامدهای تحمل ابهام رهبران و طراحی الگوی جامعی از این پیامدها صورت ­گرفته ­است.طراحی/ روش‌شناسی/ رویکرد: رویکرد کیفی روش تحلیل­ مضمون انجام­ شده­ است. جامعه­ آماری عبارتند خبرگان دانشگاهی اجرایی وزارت نفت که تجربه تصمیم‌­گیری مدیریت در شرایط عدم اطمینان را دارند. نمونه نوزده نفر بوده ­است. نمونه‌­گیری پژوهش، هدفمند گلوله‌برفی انجام ­شد. داده‌ها نیز طریق مصاحبه گرد...

astrophysics is becoming now an integral part of general physics. considering the black hole theory ,which is a new and exciting branch of relativistic astrophysics, we see many connections between elementary particle physics and astrophysics. in this article we attempt to explain the development of star physics ,in an easy ,understandable manner. previous knowledge of relativistic theory or cl...

We resolve an open question by determining matching (asymptotic) upper and lower bounds on the state complexity of the operation that sends a language L to (

Abstract Most stars are formed as star clusters in galaxies, which then disperse into galactic disks. Upcoming exascale supercomputational facilities will enable simulations of galaxies and their formation by resolving individual (star-by-star simulations). This substantially advance our understanding cluster formation, assembly histories galaxies. In previous galaxy simulations, a simple stell...