LEDs lights have numerous advantages as compared to conventional lighting sources and are becoming popular these days. Depending upon the application requirement brightness of the LEDs needs to be controlled. The brightness is controlled by controlling the forward current flowing through the LED. In this paper, different techniques used for dimming the brightness of LED lamps are reviewed. DC-D...

background most women taking combined oral contraceptives (cocs) are satisfied with their contraceptive method. however, one of the most common reasons reported for discontinuation of combined oral contraceptives (cocs) is mood deterioration. objectives this study aimed to compare effects of the second and third generation oral contraceptive pills on the mood of reproductive women. materials an...

The light-emitting diode (LED) street light market is expanding globally, and it is important to understand how LED lights affect wildlife populations. We compared evasive flight responses of moths to bat echolocation calls experimentally under LED-lit and -unlit conditions. Significantly, fewer moths performed 'powerdive' flight manoeuvres in response to bat calls (feeding buzz sequences from ...