Abstract: A method of processing a defect detection signal in a recording and/or reproducing apparatus that records and/or reproduces an optical information storage medium the method including generating a defect detection signal comprising a servo hold pulse from a radio frequency (RF) signal output from an optical pickup unit; and generating an OR signal by performing an OR operation on the defect detection signal and a first pulse signal having a first pulse width. The method further includes generating an AND signal by performing an AND operation on the OR signal and a second pulse signal having a second pulse width.

Abstract: Minimum deflection acceleration point detection, focus pull-in, and layer jump methods, and an optical disc drive capable of performing the methods. The method of detecting a minimum deflection acceleration point in an optical disc drive includes rotating a disc loaded in the optical disc drive, detecting a first minimum deflection acceleration point of the disc during one rotation cycle of the disc, and detecting a second minimum deflection acceleration point of the disc during one rotation cycle of the disc. Thus, a stable focus pull-in and layer jump is available.

Abstract: An optical disc apparatus and a method of determining an optimal writing power are provided to reduce the time required for Optimum Power Calibration (OPC) and reduce the difference between OPC results. The optical disc apparatus includes a light source which emits a laser beam to write/read data to/from an optical disc; a reader which receives a laser beam reflected from the optical disc and reads data written on the optical disc; and a controller which, to reduce the difference between OPC results, controls the light source to write test data more than once for determining an optimal writing power, controls the reader to read the test data, measures read quality of the test data, and detects an optimal writing power based on the measured read quality.

Abstract: A method and apparatus for idle mode handoff in an overlapping area of a multi-channel cell is provided. By monitoring different frequencies serviced by neighboring base stations, when a mobile station is located in an overlapping region between cells and the frequency channel being serviced in a multi-channel region is different from a channel being serviced in the neighboring base station, an idle mode handoff between cells may be smoothly performed.

Abstract: A rescan apparatus and method of a mobile terminal are provided that can monitor a specific slot during a rescan process. The rescan apparatus and method of the mobile terminal may allow the mobile terminal to monitor the specific slot while periodically rescanning systems. The mobile terminal may receive paging during the rescan process. In addition, the rescan apparatus and method may prevent call reception failure or message reception delay of the mobile terminal, thereby implementing efficient soft handover.

Abstract: A heat exchanger having corrosion resistant resin-coated plates and pipes. The heat exchanger is easily constructed using the corrosion resistant resin-coated plates and the pipes. The heat exchanger does not require heat treatments or large constructing sections. In the heat exchanger according to the present invention, a gas is supplied to the outside of pipes, and air and/or water are passed through the pipes. As a result, heat change is accomplished. A pipe plate and a side wall of the heat exchanger are coated with Teflon or a heat resistant resin. In the feed water pre-heater for heating water, pipes are formed as metal pipes coated with a resin for maintaining the strength of the pipes. Thereafter, the pipes are individually welded and fabricated. In the feed air pre-heater, the heat exchanger has side walls, a pipe plate and pipes. The side walls and the pipe plate have essentially the same structure. The pipes are made of resin. The pipe plate and pipes are united by a metal assembling member.