摘要:
The present invention is directed to a poly(ethylene glycol)-grafted aliphatic polyester represented by Formula 1: wherein X is an aliphatic ester, R is hydrogen or C1-5 alkyl, Z is the binding moiety of an initiator or a chain transfer agent, m/l is from 0.1 to 50, n is from 2 to 50, w is 1 or greater, and y is from 1 to 200. Further disclosed is a method for preparing the poly(ethylene glycol)-grafted aliphatic polyester of the present invention.
摘要:
An apparatus can constantly tune the RAS active time by comparing the RAS active time generated in synchronization with a clock signal with the RAS active signal generated through an inverter delay circuit and adjusting a delay time by feeding back the result of comparison. The apparatus includes a clock sync time, an inverter delay time generating unit, a delay correcting unit, a comparing unit, and a delay control unit. The comparing unit compares signals outputted from the clock sync time generating unit and the delay correcting unit and outputs a signal corresponding to a result of comparison, and the delay control unit generates and provides a control signal corresponding to the output signal of the comparing unit to the delay correcting unit.
摘要:
Unit type air conditioner including a base plate forming a bottom part thereof, a barrier projected upward from a center part of the base plate, to divides the unit type air conditioner into an indoor part for mounting an indoor heat exchanger thereon and an outdoor part for mounting an outdoor heat exchanger thereon, a shroud for leading air drawn from an outdoor to the outdoor heat exchanger, the shroud dividing an inside of the outdoor part, exterior members including a cabinet surrounding opposite side parts and rear side part of he outdoor part, and a cover on the cabinet to form an upper exterior of the outdoor part, and a brace fastened to the barrier, the shroud, and the exterior members, for preventing relative positional change between the barrier, the shroud, and the external members, thereby fastening components rigidly, to enhance fastening strength.