At present, development of manufacturer’s ultrasonic cleaning tank (UCT) to match the requirements from consumers usually relies on computer simulation based harmonic response analysis (HRA). However, this technique can only be used with single-frequency UCT. For dual frequency, manufacturer information empirical experiment alongside trial-and-error methods develop prototypes, resulting in UCT ...

a number of innocent rashes occurs in neonates. they are usually transient and self limited and thus require no therapy but early recognition is important to distinguish these lesions from more serious disorders. in this study, our purpose was to determine the frequency of birthmarks in iranian neonates. the presence of various types of birthmarks was determined in 503 iranian neonates under 72...