background exposure to the excessive levels of occupational noise is one of the principal harmful agents affecting the workers’ health. this study aimed to investigate the relationship between the occupational noise exposure and the hearing loss caused by working in small-scale service industries in the city of damavand, close to the metropolitan capital city of tehran, iran. methods this descr...

in this paper, a novel decision based median (dbm) filter for enhancing mr images has been proposed. the method is based on eliminating impulse noise from mr images. a median-based method to remove impulse noise from digital mr images has been developed. each pixel is leveled from black to white like gray-level. the method is adjusted in order to decide whether the median operation can be appli...

This paper involves utilizing an Arduino Uno as the primary hardware to measure sound level in a library. The amount of noise region is measured using sensor. sensor signals are amplified operational amplifier function integrated circuit LM 567. There two types output available: audio and visual. takes form personalized message that played over speakers. LEDs employed offer visual feedback, wit...

Anatrophic nephrolithotomy (ANL) in the selected cases represents the method of choice in the treatment of staghorn calculi. We evaluated postoperative outcome of patients subjected to standard ANL that received 10 mg of Verapamil immediately before declamping renal artery, due to prevention of reperfusion injury. From 2002 to 2005, 18 nephrolithotomies were performed on 15 patients, in the Uro...

This paper presents a methodology to simulate, at the system level, the substrate noise coupling to phase locked loop (PLL) circuits in mixed signal systems. Macro-modeling for digital noise injection and propagation through the substrate are considered. Behavioral models of the PLL for noise sensing as well as intrinsic functionality are abstracted from transistor level circuit analysis result...