Abstract: The present invention relates to a mesenchymal stem cell having immunomodulatory activity and a preparation method therefor and, more specifically, to: a rapamycin-treated mesenchymal stem cell having immunomodulatory activity, which expresses any one or more cell surface factors selected from the group consisting of CCR1, CCR2, CCR3, CCR4, CCR7, CCR9 and CXCR4; a cell therapy composition comprising the mesenchymal stem cell, for preventing or treating immune disorders; and a preparation method for the mesenchymal stem cell having immunomodulatory activity. The rapamycin-treated mesenchymal stem cell having immunomodulatory activity, according to the present invention, has increased expression of IDO, TGF-? and IL-10 which are factors having immunomodulatory activity, has decreased expression of Phospho-mTOR, Rictor and Ractor which are signal transduction factors of mTOR, and has increased expression, in the cell, of autophagic inducer Beclin1, ATG5, ATG7, LC3I or LCII.

Abstract: An apparatus for operating a syringe has developed comprising: an upper semi-cylindrical tube section, semi-circular shaped locking groove and lower semi-cylindrical tube section. The upper semi-cylindrical tube section is integrally formed an upper head part with a threaded hole for axial movement. The lower semi-cylindrical tube section forms a top portion, intermediate portion and end portion. A diameter (Dc) at the intermediate portion larger than the diameter (Dtip) at end portion is gradually reduced from intermediate to end portion. The length of the tapered portion is same as that portion of the constant diameter. A tip portion has formed an opened semi-circular shape to simply overlap the syringe over the cartridge for easily snapping-in and out. The syringe piston moves downward with no reverse action when the piston press-unit is rotated, thus it is possible to inject the precise amount of medicine to a patient with constant pressure.

Abstract: The present disclosure relates to a method for manufacturing a semiconductor device structure, comprising the steps of: securing the position of a semiconductor device on a plate; securing the positions of electrodes such that the electrodes face the plate; covering the semiconductor device with an encapsulating material; and separating, from the plate, the semiconductor device covered with the encapsulating material.

Abstract: An apparatus for operating a syringe has developed comprising that: an upper semi-cylindrical tube section, semi-circular groove shaped locking slot and lower semi-cylindrical tube section. The upper semi-cylindrical tube section is integrally formed an upper head part with a threaded hole for axial movement. The lower semi-cylindrical tube section forms a top portion, intermediate portion and end portion. A diameter (Dc) at the intermediate portion is larger than the diameter (Dtip) at end portion, which is gradually reduced from intermediate to end portion. The length of tapered portion is same as that of the constant diameter portion. A tip portion has formed an opened semi-circular shape to simply overlap the syringe over the syringe mounting device for easily snapping-in and out. The syringe piston moves downward with no reverse action when the piston press unit is rotated, so that it is possible to inject the precise amount of medical to a patient with constant pressure.

Abstract: A pin guide for the surgical operation of an avascular necrosis of a femoral head includes a guide body having a central pin guide hole extending along a centerline of the guide body and a plurality of side pin guide holes formed so as to make a specified angle with the central pin guide hole. The side pin guide holes are radially arranged around the central pin guide hole at a front side of the guide body and joined to the central pin guide hole at a rear side of the guide body.

Abstract: The present invention relates to a composition for cartilaginous tissue repair and to a production method therefor. The present invention comprises the steps of: (a) dissolving freeze-dried fibrinogen in an aprotinin solution; (b) dissolving freeze-dried thrombin in a stabilizing solution; (c) mixing an enriched collagen solution with thrombin and the stabilizing solution; and installing the fibrinogen solution (a) to one side of a dual kit and the solution (c) containing the collagen to the other side, and then mixing and injecting into damaged cartilaginous tissue. In the present invention, which is constituted as described above, biomaterials such as collagen and fibrin are mixed so as to allow damaged cartilaginous tissue to be repaired to a state allowing transplantation onto the tissue, and efficient regeneration is induced, thereby making it possible to reduce surgery-related stress on people and animals while inducing relatively rapid and efficient cartilage repair and regeneration.

Abstract: An optical pickup device to provide a stable operation in both low-speed and high-speed modes by controlling a change in natural frequency, the optical pickup device including: a lens holder to support an objective lens; a supporting unit spaced apart from the lens holder; and a plurality of suspension members each having one end fixed to the lens holder and another end supported by the supporting unit to enable a movement of the lens holder, wherein the supporting unit includes a fixing member, a coupling portion provided in the fixing member to couple each suspension member, magnetic fluid received in the coupling portion, and an excite device to apply a magnetic field to the magnetic fluid.

Abstract: An optical pickup actuator independently drivable in focusing, tilting and tracking directions. The optical pickup includes a lens holder movably installed on a base, and mounted with an objective lens for transmitting an incident light to an optical information recording medium; and a magnetic circuit to independently driving the lens holder in the focusing, tilting and tracking directions. The magnetic circuit includes opposing magnets; a focusing coil and tilting coils interposed between the magnets, mounted inside the lens holder, and wound around respective axes parallel to the focusing direction; and a plurality of tracking coils mounted outside the lens holder, interposed between the magnets and wound around respective axes transverse to the focusing direction. The magnetic fields of the magnets are guided by outer yokes partially encompassing the magnets and inner yokes positioned within the focusing coil and the tilting coils.

Abstract: An actuator used with an optical pickup includes: a base on which a holder is fixed; a lens holder in which a plurality of installation holes are formed such that a plurality of objective lenses to record and/or reproduce optical discs having different recording densities are installed at different heights; a support member, which movably supports the lens holder, having one end coupled to the lens holder and the other end coupled to the holder; and a magnetic circuit which drives the lens holder in focusing and tracking directions. The plurality of installation holes include a first installation hole in which a first objective lens for at least one type of low density optical disc is installed, and a second installation hole in which a second objective lens for a higher density optical disc than the low density optical disc is installed.

Abstract: An optical pickup actuator and an optical recording/reproducing apparatus are provided. The optical pickup actuator can include a three-axial driving unit to independently drive an objective lens to focus a laser beam onto a disk in a focusing direction, a tracking direction and a radial-tilt direction, respectively, and a tangential-tilt driving unit to drive the three-axial driving unit in a tangential-tilt direction to drive the objective lens in the tangential-tilt direction.

Abstract: An optical pickup apparatus includes an objective lens that focuses light on an optical recording medium; an actuator that drives the objective lens in a direction of an optical axis of the objective lens toward or away from an optical recording medium in response to an input voltage applied to the actuator; an actuator driven distance sensor that senses a distance the actuator moves according to time or the input voltage applied to the actuator; an input voltage calculator that calculates an input voltage to be applied to the actuator that compensates for a hysteresis phenomenon that occurs during movement of the actuator based on the distance sensed by the actuator driven distance sensor; and a controller that controls operation of the actuator according to the input voltage calculated by the input voltage calculator.

Abstract: An optical pickup actuator is provided. The actuator comprises a bobbin, on which one or more objective lenses are mounted for allowing light to be incident onto an optical information storage medium, and which is supported by a support member to be movable in relation to a base. The actuator also comprises a magnetic circuit for independently driving the bobbin in focusing and tilt directions.

Abstract: An optical pickup of an optical recording and reproducing apparatus includes a plurality of object lenses used to record and or reproduce information from/to various types of optical recording media of different recording densities; an actuator driving the object lenses in a focusing direction and supporting the object lenses to have rolling during movement in the focusing direction; and a pickup base installed to movably go and return in a radial direction of an optical recording medium, and the actuator forming a predetermined angle with respect to the pickup base.

Abstract: An optical pickup actuator comprises a lens holder having an object lens which focuses a laser beam onto an optical information storage medium mounted thereon. In the optical pickup actuator the lens holder is movably supported by a support member with respect to a base. The optical pickup actuator also comprises a magnetic circuit to drive the lens holder in a focusing direction and a tilt direction independently.

Abstract: An optical pickup actuator, including a lens holder movably installed on a base, and mounted with an objective lens to transmit an incident light to an optical information recording medium, and a magnetic circuit to independently drive the lens holder in a focusing direction, a tilting direction and a tracking direction, respectively.

Abstract: An optical pickup actuator including a blade supported by a plurality of suspensions to be movable with respect to a base and a magnetic circuit to drive a movable part including the blade, a method of manufacturing the optical pickup actuator, an optical pickup employing the optical pickup actuator, and an optical recording and/or reproducing apparatus employing the optical pickup. The movable part includes a weight center adjusting element of the movable part in order to induce a radial rolling operation in a direction in which an optical axis of an objective lens is perpendicular to an information storage surface of an information storage medium, during a focusing operation in a high frequency band above the first resonant frequency of the optical pickup actuator.

Abstract: An actuator for an optical pick-up, including: a holder fixed to a base; a bobbin capable of accommodating a plurality of objective lenses for recording and/or reproducing information onto and/or from optical discs with different recording densities; a suspension for connecting the bobbin and the holder, and supporting the bobbin to be movable; and a magnetic circuit for driving the bobbin in focusing, tilting, and tracking directions, wherein the magnetic circuit includes a plurality of focusing/tilting coils installed in the bobbin to be in correspondence to the plurality of lenses, and driving the bobbin in at least one of focusing and tilting directions; a plurality of magnets having the focusing/tilting coils therebetween, in which same polarities of the magnets make one pair; and tracking coils supported by the bobbin, and generating a driving force to drive the bobbin in the tracking direction.

Abstract: An optical pickup actuator and a method of assembling the same is provided. The method of assembling the optical pickup actuator comprises the steps of providing a blade having at least one objective lens mounting area and an aberration correcting mechanism mounting area, arranging an objective lens in the objective lens mounting area, positioning an aberration correcting mechanism in the aberration correcting mechanism mounting area such that the central point of the aberration correcting mechanism coincides with the central point of the objective lens, tuning the aberration correction mechanism, and adhering the aberration correcting mechanism using an adhesive.

Abstract: An optical pickup device is provided with a plurality of object lens corresponding to various kinds of optical discs having different recording densities, in which the structure of the optical pickup device is simplified and the size of the optical pickup device is minimized. The optical pickup device comprises a bobbin including an upper surface, at which first and second object lenses are mounted, an opened lower surface, and a first and second side surfaces supported by a supporting unit, the first and second side surfaces being opposite to each other, a first focus coil and a first tracking coil mounted at a third side surface of the bobbin, a second focus coil and a second tracking coil mounted at a fourth side surface of the bobbin, which is opposite to the third side surface, and magnets disposed opposite to the first and second focus coils and the first and second tracking coils.

Abstract: An apparatus for operating a syringe piston is developed, which is comprised of: a syringe mounting section for fixedly holding a syringe, a thread hole formed at an upper head part of the syringe mounting section, and a piston press unit having a threaded rod, which is inserted into the thread hole so that the syringe piston press unit can move up and down along the thread hole, a locking slot for fixedly inserting and retaining the medicine filled syringe, a semi-cylindrical tube to assemble with the syringe mounting section. The syringe filled with medical cement is attached to the syringe mounting section and the syringe piston is moved downward with no reverse movement when the piston press unit is rotated, so the medical cement contained in the syringe is injected with a constant pressure, so that a predetermined amount of medical cement is precisely injected into a patient's body.