background & objectives: the aim of this study was to compare the effectiveness of two stapes prostheses in hearing improvement of patients undergoing stapes surgery for otosclerosis.   materials & methods: in this retrospective and descriptive study, the charts of 291 stapedectomies performed by one surgeon (first author) from 1997 to 2011 in imam khomeini and apadana hospitals of ahva...

in this paper, simultaneous placement of distributed generation, capacitor bank and protective devices are utilized to improve the efficiency of the distribution network. the objectives of the problem are reduction of active and reactive power losses, improvement of voltage profile and reliability indices and increasing distribution companies’ profit. the combination of firefly algorithm, parti...

This study analyzed that the penetration of electromagnetic waves through an unknown opening in a large enclosure generated standing within enclosure, thereby reducing its shielding characteristics. A 3D numerical analysis confirmed performance can be improved by using absorbers to reduce wave. was verified experimentally.