pulse-width modulated (pwm) adjustable frequency drives (afds) are extensively used in industries for control of induction motors. it has led to significant advantages in terms of the performance, size, and efficiency but the output voltage waveform no longer remains sinusoidal. hence, overshoots, high rate of rise, harmonics and transients are observed in the voltage wave. they increase voltag...

background and objectives: stress among students of the health sciences can lead to reduced performance of future healthcare human resources. to address this threat there is a need to develop a robust understanding of the nature and intensity of stress in these professionals. to help approaching this goal, the present study assessed stress-induced life change in students of tehran university of...

objective: the determinants of satisfaction of life (swl) are poorly described among iranian employed ‎nurses. this study aimed to assess the effect of various factors including age, gender, marital ‎status, depression, anxiety and stress on swl among iranian nurses.‎ method: employed nurses in three teaching hospitals were invited to participate in this study. ninety-four ‎nurses (65 women and...

stress is not always a direct result of stressful conditions, but rather the way they are perceived. thus individual variables that may be associated with perceived stress should be examined in stress studies. this study investigates the intermediary role of self-efficacy in relation with stress, glycosylated haemoglobin and health-related quality of life in patients with type2 diabetes.all wom...

background: it has been prover that the prevalence of experiencing job related stress is very high among the dentists. this stress can be the result of factors such as poor lightening of dental office and noise. this stress can cause emotional distress and threaten dentists’ physical health and affect the quality of their life. this study is conducted to determine dentists’ professional quality...

Objectives: This study sought to assess the level of stress in general dentists in the 2nd district of Tehran city in 2014 to find out the stressors and suggest strategies to overcome them. Methods: This descriptive, analytical, cross-sectional study was conducted on 130 general dentists from the 2nd district of Tehran city selected via weighted randomization. Level of stress was assessed us...