Abstract: Disclosed are a multipurpose, high-functional, alkaline solution composition, preparation therefor and use thereof as a nonspecific immunostimulator. The composition comprises 1-25 parts by weight of borax (Na2B4O7.10H2O), 10−5-10−4 parts by weight of sodium thiosulfate (Na2S2O3.5H2O), 30-150 parts by weight of potassium carbonate, 30-200 parts by weight of refined sugar (C12H22O11), and 100-200 parts by weight of water, based on 100 parts by weight of sodium metasilicate (Na2SiO3.5H2O). In addition to bringing about an improvement in disease resistance, weight gain rate, crop yield, crop quality, harvest time, the composition shows nonspecific immunostimulating activities, including antibody production and immune enhancement, by activating immune cells, thereby maximizing vaccination effects on malignant viral diseases.

Abstract: Disclosed are a multipurpose, high-functional, alkaline solution composition, preparation therefor and use thereof as a nonspecific immunostimulator. The composition comprises 1-25 parts by weight of borax (Na2B4O7.10H2O), 10−5-10−4 parts by weight of sodium thiosulfate (Na2S2O3.5H2O), 30-150 parts by weight of potassium carbonate, 30-200 parts by weight of refined sugar (C12H22O11), and 100-200 parts by weight of water, based on 100 parts by weight of sodium metasilicate (Na2SiO3.5H2O). In addition to bringing about an improvement in disease resistance, weight gain rate, crop yield, crop quality, harvest time, the composition shows nonspecific immunostimulating activities, including antibody production and immune enhancement, by activating immune cells, thereby maximizing vaccination effects on malignant viral diseases.

Abstract: Disclosed are a multipurpose, high-functional, alkaline solution composition, preparation therefor and use thereof as a nonspecific immunostimulator. The composition comprises 1-25 parts by weight of borax (Na2B4O7.10H2O), 10−5-10−4 parts by weight of sodium thiosulfate (Na2S2O3.5H2O), 30-150 parts by weight of potassium carbonate, 30-200 parts by weight of refined sugar (C12H22O11), and 100-200 parts by weight of water, based on 100 parts by weight of sodium metasilicate (Na2SiO3.5H2O). In addition to bringing about an improvement in disease resistance, weight gain rate, crop yield, crop quality, harvest time, the composition shows nonspecific immunostimulating activities, including antibody production and immune enhancement, by activating immune cells, thereby maximizing vaccination effects on malignant viral diseases.

Abstract: The present disclosure relates to a system for detecting a plurality of defect types on the surface of a disk in a hard disk drive. In particular, the disclosure relates to utilizing information obtained from a plurality of servo bits to determine if a sector contains a physical defect. Where such a defect is found, the sector's write gate is disabled and its burst signal data is ignored for track following purposes. In addition, large changes in PES are used to identify closure spike defects. Such defects are managed by providing a compensation signal to the read value of the PES to improve track following. Finally, high PES values are used to signal a third defect type where no other signs of defect are present. In such case, the sector is mapped as defective, but the burst signals continue to be used for track following purposes.

Abstract: An apparatus, method and computer program product for a hard disk drive defect detection system. In one embodiment, a method of detecting defects on the surface of a disk having a plurality of tracks is recited. The method comprises reading, one or more times, the servo bits for a plurality of sectors and determining a burst measure for at least one sector, where the burst measure is a function of the burst signals for the sector. This method further comprises determining a reference value, where the reference value is a function of the burst signals of the plurality of sectors, and comparing the burst measure of at least one sector to the reference value to identify a potential defect. In one embodiment, a sector is mapped as defective where its burst measure differs from the reference value by at least 5 percent.

Abstract: A method of gain calibration capable of providing the better performance and stability in a servo control system of a disk drive recording apparatus (hard disk drive) by the measurement and calibration of its gain. The method includes the steps of performing a track seek operation for a given target track, applying the maximum current to the actuator thereby to repeatedly measure moving velocity of the actuator and store the measured values, calculating an average moving velocity from the stored measured values in case that a number of measurement repetition for the moving velocity of the actuator exceeds a given number of times, calculating a scaling factor according to a gain difference of the calculated average moving velocity with respect to a reference velocity stored in a memory, and generating a gain parameter by calculating a reciprocal value of the scaling factor.

Abstract: The present invention provides a hard disk drive that employs a plurality of data recording disks. According to a first embodiment, one of the data recording disks provides first and second recording surfaces that each exhibit specific servo patterns. The first recording surface includes first servo sectors with first burst regions positioned within each one of the first servo sectors. Each one of the first servo sectors has a first full gray code recorded outside the corresponding first burst regions. The second recording surface includes second servo sectors with second burst regions positioned within each one of the second servo sectors. Each one of the second servo sectors has a second full gray code recorded within the corresponding second burst regions and no gray code recorded outside the corresponding second burst regions. The remaining data recording disks each have recording surfaces with the same servo pattern as the second recording surface.