Abstract: A semiconductor device comprises a device isolation layer disposed in a portion of a substrate of first conductivity type. An outline of the device isolation layer defines an active region of the substrate. An impurity diffused region of second conductivity type may be formed in a portion of the active region; and a silicide layer may be formed to cover the impurity diffused region of second conductivity type. The device isolation layer may include a recess formed therein to expose a portion of the substrate of first conductivity type adjacent to the impurity diffused region of second conductivity type. The silicide layer that is formed to cover the impurity diffused layer of second conductivity type may extend over and against the exposed region of the substrate of first conductivity type that was exposed by the recess of the device isolation layer.

Abstract: A method of measuring the degree of thermal pole tip protrusion (TPTP) of a magnetic head and controlling a recording current in consideration of the degree of TPTP, in relation to a hard disk drive includes measuring the rate of errors contained in data by performing writing and reading operations while changing the level of an overshoot current (OSC), detecting a minimum error rate and a maximum error rate while changing a range of the OSC, and determining the degree of TPTP by measuring the difference between the minimum error rate and the error rate at the maximum OSC.

Abstract: A method and apparatus to determine a magnetic write width of a magnetic head using burst patterns. The method includes seeking a target track on a magnetic disc to write a burst pattern on the target track; seeking tracks adjacent to the target track to write burst patterns on the adjacent tracks, which are offtracked by a predetermined percentage toward the target track, moving the magnetic head along a radial direction of the magnetic disc and measure an output signal of the magnetic head, to create an offtrack profile, and determining an amplitude reduction ratio of the target track from the offtrack profile, to determine a magnetic write width corresponding to the determined amplitude reduction ratio.

Abstract: Disclosed is an accounting system and method based on network service quality in a mobile communication system. The system and method for controlling accounting according to quality of service (QoS) information of a packet data service system, comprises allocating by a packet data service node QoS based on QoS profiles transmitted from an authentication, authorization, and accounting (AAA) server and setting by the packet data service node a service instance which is able to differentiate applications according to QoS levels, the packet data service node having received the QoS information requested to be set from a mobile station, and after service is started, adding by the packet data service node the allocated QoS information to accounting information including information regarding an amount of packet data transmitted to the mobile station so as to transmit the allocated QoS information to the AAA server.

Abstract: A system and method of providing a Push-To-Talk (PTT) service in a mobile communication system are provided. Particularly, a new service option for the PTT service is defined and set before a call setup between a mobile station (MS) and a base station (BS) in order to allow the MS and the BS to recognize a PTT call. Upon receipt of an origination message including the service option of the PTT service from the MS, the BS establishes a Radio Link Protocol (RLP) with the MS and establishes a Point-to-Point Protocol (PPP) session to provide the PTT service in packet data to the MS.

Abstract: A method of screening a hard disk drive (HDD) including: measuring one or more parameters to display read/write head performances at least two times during an HDD process; and calculating variances of the measured one or more parameters and judging whether head degradation has occurred based on the calculated variances.

Abstract: A disk drive having a single head for recording data on and reading data from a disk-type recording medium, the disk drive including: a spindle motor to rotate the disk-type recording medium; and a controller to drive the spindle motor and the single head. The controller drives the single head to record system information of the disk drive on an original copy portion and at least one backup copy portion of the disk-type recording medium.

Abstract: Methods and apparatus are disclosed determining the presence of base line popping noise for a read head inside an assembled disk drive, as well as, determining read bias conditions for operating the read head free of base line popping noise. These further include performance evaluation of the read head for read bias conditions free of base line popping noise. They also include repairing the read head using DC write current and read bias current within the assembled disk drive.

Abstract: A semiconductor device comprises a device isolation layer disposed in a portion of a substrate of first conductivity type. An outline of the device isolation layer defines an active region of the substrate. An impurity diffused region of second conductivity type may be formed in a portion of the active region; and a silicide layer may be formed to cover the impurity diffused region of second conductivity type. The device isolation layer may include a recess formed therein to expose a portion of the substrate of first conductivity type adjacent to the impurity diffused region of second conductivity type. The silicide layer that is formed to cover the impurity diffused layer of second conductivity type may extend over and against the exposed region of the substrate of first conductivity type that was exposed by the recess of the device isolation layer.

Abstract: A method optimizing a recording current in consideration of operating temperatures of a hard disk drive and a method of setting a recording density in consideration of tracks per inch (TPI) or adjacent track erasure (ATE) characteristics. The method of optimizing the recording current measures a rate of errors under a test condition corresponding to the operating temperature of a hard disk drive, while changing a recording parameter, selects a recording parameter value corresponding to a smallest rate of errors, and optimizes the recording current for the hard disk drive under operating environmental conditions using the selected recording parameter value.

Abstract: A method of measuring the degree of thermal pole tip protrusion (TPTP) of a magnetic head and controlling a recording current in consideration of the degree of TPTP, in relation to a hard disk drive includes measuring the rate of errors contained in data by performing writing and reading operations while changing the level of an overshoot current (OSC), detecting a minimum error rate and a maximum error rate while changing a range of the OSC, and determining the degree of TPTP by measuring the difference between the minimum error rate and the error rate at the maximum OSC.

Abstract: A semiconductor device comprises a device isolation layer disposed in a portion of a substrate of first conductivity type. An outline of the device isolation layer defines an active region of the substrate. An impurity diffused region of second conductivity type may be formed in a portion of the active region; and a silicide layer may be formed to cover the impurity diffused region of second conductivity type. The device isolation layer may include a recess formed therein to expose a portion of the substrate of first conductivity type adjacent to the impurity diffused region of second conductivity type. The silicide layer that is formed to cover the impurity diffused layer of second conductivity type may extend over and against the exposed region of the substrate of first conductivity type that was exposed by the recess of the device isolation layer.

Abstract: A method and apparatus to determine a magnetic write width of a magnetic head using burst patterns. The method includes seeking a target track on a magnetic disc to write a burst pattern on the target track; seeking tracks adjacent to the target track to write burst patterns on the adjacent tracks, which are offtracked by a predetermined percentage toward the target track, moving the magnetic head along a radial direction of the magnetic disc and measure an output signal of the magnetic head, to create an offtrack profile, and determining an amplitude reduction ratio of the target track from the offtrack profile, to determine a magnetic write width corresponding to the determined amplitude reduction ratio.

Abstract: The invention includes methods determining the presence of base line popping noise for a read head inside an assembled disk drive, as well as, determining read bias conditions for operating the read head free of base line popping noise. The invention further includes performance evaluation of the read head for read bias conditions free of base line popping noise. The invention also includes repairing the read head using DC write current and read bias current within the assembled disk drive.

Abstract: A semiconductor device comprises a device isolation layer disposed in a portion of a substrate of first conductivity type. An outline of the device isolation layer defines an active region of the substrate. An impurity diffused region of second conductivity type may be formed in a portion of the active region; and a silicide layer may be formed to cover the impurity diffused region of second conductivity type. The device isolation layer may include a recess formed therein to expose a portion of the substrate of first conductivity type adjacent to the impurity diffused region of second conductivity type. The silicide layer that is formed to cover the impurity diffused layer of second conductivity type may extend over and against the exposed region of the substrate of first conductivity type that was exposed by the recess of the device isolation layer.

Abstract: An implantable bioresorbable membrane for the separation and regeneration of tissue in a defect site and augmentation of tissues surrounding other implants comprises: (a) porous bioresorbable polymer matrix made of a bioresorbable polymer selected from the group consisting of polylactic acid, poly(lactic-co-glycolic acid), polycarprolactone, polyparadioxanone, polytrimethylene carbonate and a mixture thereof; and (b) a reinforcing fabric made of bioresorbable fibers embedded in said matrix, and is produced by preparing a fabric as a support from bioresorbable fibrous materials, coating the fabric with a solution containing a bioresorbable polymer and a pore forming agent, and treating the coated fabric to generate pores.