This study was aimed to correlate echogenic amniotic fluid particle size (AFPS) in late third trimester to fetal lung maturity and amniotic fluid optical density (AFOD) at labor. AFPS were measured with specified criteria by real time transabdominal USG (3.5MHz) while Amniotic Fluid Index (AFI) was measured during routine antenatal visits. The criteria for AFPS score which are taken into accoun...

Through ambulatory blood pressure (BP) monitoring, we know that BP usually follows a distinct circadian rhythm, characterized by a nocturnal decline during sleep of 10% to 30%, followed by a moderate-to-marked increase coinciding with the time of awakening.1 For 2 decades, there has been great interest in the early morning period by preventive cardiologists and hypertension specialists, because...

Progress report on the restructuring of two IEEE standards concerned with surges in low-voltage a.c. power circuits into a Trilogy of three documents. First a basic Guide describes the surge environment, then a Recommended Practice proposes a limited set of representative surge waveforms for test purposes, and finally a Recommended Practice shows how to perform safe, repeatable and reliable sur...

The paper offers a rationale for avoiding attempts to characterize the surge environment in low-voltage end-user power systems by a single number – the "energy in the surge" – derived from a simple voltage measurement. Numerical examples illustrate the fallacy of this concept. Examples are given of equipment for which a failure can be caused by a surge voltage, but with or without relationship ...