Uninterruptible power supplies (UPS), which are used to provide uninterrupted and high-quality energy the consumer, have also changed in parallel with developments sector. In process, efficiency of conventional UPSs has increased by electronics elements, dimensions weights been reduced transformerless UPSs. Recently, UPS systems, not indifferent renewable achieved a hybrid structure using obtai...

there is a growing interest among the higher education principals and policy makers to improve teacher evaluation methods and more important than that to use the evaluation data. a number of research studies implied the ineffective instruction of esp courses in iran (atai, 2002; eslami, 2005; hayati, 2008; ahmadi, 2008; sherkatolabbasi & mahdavi, 2012; boniadi, ghojazadeh & rahmatvand, ...