the purpose of this research is to study the effects of board of director structure on financing constraints for the companies listed on tehran stock exchange (tse). for this purpose, indigenised kaplan and zingales (kz) index  has been used as a proxy for financing constraints. the population consists of 56 companies of tse spanning 2007-2013 and the multivariate logistic regression is used. t...

synthesis, identification and thermal behavior studies of nanoparticles cobalt (ii) bromide has been studied in this research. cobalt (ii) bromide was synthesized by planetary high-energy ball mill. the general formula of this compound is cobr2.6h2o. the synthesized nanoparticles were characterized by fourier transform infrared spectroscopy and also size and structure of synthesized nanoparticl...

the cúk converter, which has voltage buck and boost ability, offers high flexibility as an interface device for solar panels. in addition, current ripple can be more reduced because of two input and output inductors at both sides. this paper presents a new application of current-variable inductors in a cúk converter that reduces the size and capacity of storage elements. because of two inductor...

Understanding electrodes' surface morphology influence on ions' distribution is essential for designing supercapacitors with enhanced energy density characteristics. We develop a model the structure of electrolytes near rough electrodes. The describes an effective electrostatic field's increase and associated intensification spatial separation at electrode-electrolyte interface. These adsorptio...