Abstract: Provided is a method performed by a least one computing device for a message service. The method comprises receiving a transmission request for a compound message which is a bundled message comprising a parent message and a plurality of child messages, obtaining permission information for a sender of the compound message, determining whether to allow each of the child messages to be sent based on the permission information and controlling transmission of the compound message based on the determination result.

Abstract: A flexible display device including a substrate, a light emitting layer, a first insulating layer, and a conductive layer. The substrate includes a bent region and a non-bent region. The light emitting layer overlaps the non-bent region. The first insulating layer is disposed on the substrate. The conductive layer is disposed on the first insulating layer. A sidewall of the first insulating layer includes a first tapered surface. The first tapered surface includes at least three curved surface portions continuously arranged with one another.

Abstract: The present invention relates to a foundation reinforcing apparatus using a bracing-type supporting structure and a lateral prestressing device and a foundation reinforcing method using the same, wherein, in the foundation reinforcement used for remodeling construction that requires an extension of a building such as an apartment, the foundation reinforcing apparatus introduces lateral pre-stressing force into a bracing-type supporting structure to introduce a preloading load to a new pile of a new footing by using an upper supporting plate, which is connected to an existing vertical part and an existing slab, as a reaction bed and allows the new pile to share a load applied before and after the extension of the building so that reinforcement efficiency is increased, and thus construction is performed economically.

Abstract: The present invention relates to a foundation reinforcing apparatus using a bracing-type supporting structure and a lateral prestressing device and a foundation reinforcing method using the same, wherein, in the foundation reinforcement used for remodeling construction that requires an extension of a building such as an apartment, the foundation reinforcing apparatus introduces lateral pre-stressing force into a bracing-type supporting structure to introduce a preloading load to a new pile of a new footing by using an upper supporting plate, which is connected to an existing vertical part and an existing slab, as a reaction bed and allows the new pile to share a load applied before and after the extension of the building so that reinforcement efficiency is increased, and thus construction is performed economically.

Abstract: The present invention relates to a preloading apparatus and a method of reinforcing a foundation using the same, wherein, in a preloading method used for remodeling construction in which an extension of a building, such as an apartment, is required, the preloading apparatus allows adjustment of a preloading load, such as addition of a preloading load, to be performed when loss of the preloading load occurs and allows the new pile to effectively share a load applied before and after an extension of a building so that reinforcement efficiency is increased, and thus a load is adjustable economically.

Abstract: The present invention relates to a preloading apparatus and a method of reinforcing a foundation using the same, wherein, in a preloading method used for remodeling construction in which an extension of a building, such as an apartment, is required, the preloading apparatus allows adjustment of a preloading load, such as addition of a preloading load, to be performed when loss of the preloading load occurs and allows the new pile to effectively share a load applied before and after an extension of a building so that reinforcement efficiency is increased, and thus a load is adjustable economically.

Abstract: The present invention relates to a vacuum valve, and more particularly, to a vacuum valve including a valve housing with a blade, a main shaft, a vertical moving part, a horizontal moving part, a horizontal moving unit, and a main body bracket. Opening and closing guide holes are obliquely formed in both side surfaces such that cam rollers, having passed through the vertical moving guide grooves, are inserted into the grooves so as to guide the fore and aft movement of the blade according to the vertical movement of the horizontal moving unit.

Abstract: A blade for vacuum valves is provided with an opening/closing plate having one side surface coming into contact with a moving passage part. A screw coupling part is formed on the other side surface and a first elastic member seating part is formed on the outer circumference of the screw coupling part. A shaft connecting bar is provided on the other surface of the opening/closing plate having a contact protrusion part having a second elastic member seating part and a connecting part formed in the contact protrusion part so that a connecting unit is inserted. The first elastic member is provided between the first elastic member seating part and the second elastic member seating part to guide the elastic connection between the opening/closing plate and the shaft connecting bar.

Abstract: A bidirectional gate valve including: a blade (200) installed in a valve housing (100) having first and second passage holes (110, 120) to open/close the first and second passage holes (110, 120); a shaft (300) coupled to a lower portion of the blade (200); a first driving block (400) including: a first cylinder (410) which is provided under the valve housing (100) and into which the shaft (300) is inserted; a first piston (420) installed inside the first cylinder (410) and coupled to a lower portion of the shaft(300) to vertically move the shaft (300) according to pressure change inside the first cylinder (410).

Abstract: The present invention is characterized by including: a blade (200) installed in a valve housing (100) having first and second passage holes (110, 120) to open/close the first and second passage holes (110, 120); a shaft (300) coupled to a lower portion of the blade (200); a first driving block (400) including: a first cylinder (410) which is provided under the valve housing (100) and into which the shaft (300) is inserted; a first piston (420) installed inside the first cylinder (410) and coupled to a lower portion of the shaft (300) to vertically move the shaft (300) according to pressure change inside the first cylinder (410); and horizontal movement guide rollers (430, 430?) respectively provided on both outer sides thereof to guide the horizontal movement of the blade 200; a second driving block 500 which is coupled to a lower portion of the first guiding block 400 so as to be vertically movable and which guides the horizontal movement of the blade 200 according to the vertical movement thereof such that

Abstract: A vacuum valve improving product performance of a packing ring to extend a replacement period of the packing ring is disclosed. As an opening and closing driving guide groove including a protruding groove section and first and second inclined groove sections is defined in each of both side surfaces of a driving block, and an L-motion roller inserted into and moving along the opening and closing driving guide groove is provided on an L-motion block, when the L-motion roller is disposed at an end of the first inclined groove section, one side surface of a valve blade closes an inlet, and when the L-motion roller is disposed at an end of the second inclined groove section, one side surface of the valve blade closely contacts an inner surface of the housing. The packing ring provided on a closing surface of the valve blade is blocked from contacting air or fluid.

Abstract: Disclosed herein is an upper housing 100 having openings that are respectively defined in a front surface and a rear surface thereof and in which first and second moving paths 110 and 120 are defined; a first blade 200 installed in the upper housing 100 to move upward from a lower side, thereby opening/closing the first moving path 110; a first shaft 300 coupled to a lower portion of the first blade 200; a lower housing 400 disposed below the upper housing 100, in which a rotation guide groove 410 for guiding rotation of a L-motion block 500 at a fixed position while the first blade 200 moves in a close direction C is defined in each of both inner surfaces of the lower housing (400).

Abstract: The present invention comprises: an opening/closing plate formed in a plate shape and having one side surface coming into contact with a moving passage part, a screw coupling part formed on the other side surface, and a first elastic member seating part on the outer circumference of the screw coupling part so as to allow one side surface of a first elastic member to be seated thereon; at least one shaft connecting bar provided on the other surface of the opening/closing plate, and having a contact protrusion part having a second elastic member seating part formed to allow the other side surface of the first elastic member to be seated thereon, and a connecting part formed in the contact protrusion part so that a connecting unit is inserted; the first elastic member provided between the first elastic member seating part and the second elastic member seating part so as to guide the elastic connection between the opening/closing plate and the shaft connecting bar; and the connecting unit inserted into the connec

Abstract: The present invention comprises: a valve housing having a driving space formed therein and a moving passage part perforated in both surfaces thereof; a blade provided in the driving space, for opening and closing the moving passage part from the inside; a main shaft coupled to the rear surface of the blade; a vertical moving part which is formed beneath the valve housing, and in which the main shaft and a first piston, which moves vertically by pneumatic pressure, are connected to vertically move the blade; a horizontal moving part coupled to the lower part of the vertical moving part and provided with a vertical moving guide groove perforated vertically in both side surfaces; a horizontal moving unit having a second piston provided inside the horizontal moving part, a movement guide block formed beneath the second piston, and a cam roller formed at both sides of the movement guide block and passing through the vertical moving guide groove; and a main body bracket formed such that the vertical moving part and

Abstract: The present invention relates to an FBG sensor for measuring a maximum strain of an object being measured, a method for manufacturing the sensor, and a method of using the sensor. To this end, provided is the FBG sensor for measuring a maximum strain, comprising: an optical fiber (130) having an FBG sensor (150) therein; a first metallic foil (120) contacting the optical fiber (130) on one surface thereof; a second metallic foil (120) which comes into surface-contact with the one surface; an adhesive layer (140) provided between the first and second metallic foils (100, 120); a means for measuring a residual strain of the first and second metallic foils (100, 120) through the FBG sensor (150); and a means for calculating a maximum strain on the basis of the measured residual strain and a sensitivity coefficient (Csen) obtained through experimentation.

Abstract: A vacuum valve improving product performance of a packing ring to extend a replacement period of the packing ring is disclosed. As an opening and closing driving guide groove including a protruding groove section and first and second inclined groove sections is defined in each of both side surfaces of a driving block, and an L-motion roller inserted into and moving along the opening and closing driving guide groove is provided on an L-motion block, when the L-motion roller is disposed at an end of the first inclined groove section, one side surface of a valve blade closes an inlet, and when the L-motion roller is disposed at an end of the second inclined groove section, one side surface of the valve blade closely contacts an inner surface of the housing. The packing ring provided on a closing surface of the valve blade is blocked from contacting air or fluid.

Abstract: Disclosed herein is an upper housing 100 having openings that are respectively defined in a front surface and a rear surface thereof and in which first and second moving paths 110 and 120 are defined; a first blade 200 installed in the upper housing 100 to move upward from a lower side, thereby opening/closing the first moving path 110; a first shaft 300 coupled to a lower portion of the first blade 200; a lower housing 400 disposed below the upper housing 100, in which a rotation guide groove 410 for guiding rotation of a L-motion block 500 at a fixed position while the first blade 200 moves in a close direction C is defined in each of both inner surfaces of the lower housing (400).

Abstract: The present invention relates to an FBG sensor for measuring a maximum strain of an object being measured, a method for manufacturing the sensor, and a method of using the sensor. To this end, provided is the FBG sensor for measuring a maximum strain, comprising: an optical fiber (130) having an FBG sensor (150) therein; a first metallic foil (120) contacting the optical fiber (130) on one surface thereof; a second metallic foil (120) which comes into surface-contact with the one surface; an adhesive layer (140) provided between the first and second metallic foils (100, 120); a means for measuring a residual strain of the first and second metallic foils (100, 120) through the FBG sensor (150); and a means for calculating a maximum strain on the basis of the measured residual strain and a sensitivity coefficient (Csen) obtained through experimentation.

Abstract: In a structure which forms an upper structure and a lower structure divided by an anti-vibration pad for vibration isolation therein, since the concavo-convex type shear key is formed using the precast concrete shear-key block, the construction can be precisely performed according to the predetermined standard. Therefore, a vibration isolation structure using a precast concrete shear-key block and an anti-vibration pad which are capable of effectively blocking vibration and noise, and a constructing method thereof are provided.

Abstract: In a structure which forms an upper structure and a lower structure divided by an anti-vibration pad for vibration isolation therein, since the concavo-convex type shear key is formed using the precast concrete shear-key block, the construction can be precisely performed according to the predetermined standard. Therefore, a vibration isolation structure using a precast concrete shear-key block and an anti-vibration pad which are capable of effectively blocking vibration and noise, and a constructing method thereof are provided.