Abstract: A caterpillar changing apparatus includes a floor frame; a moving fame movable with respect to the floor frame; and a supporting unit including at least one body, the supporting unit provided on the moving frame and configured to support a caterpillar to maintain a shape of the caterpillar that the caterpillar has when installed on a vehicle.

Abstract: The present disclosure relates to a collimator for radiation generating apparatus, attached to a radiation generating apparatus, the collimator comprising: a frame fixed to the radiation generating apparatus and formed in a ring shape; and a shielding adjustment part provided with a plurality of shielding wings, one end of the shielding wings being hinged to the frame such that, when rotated, the other end of the shielding wings enters into a center of the frame, and the each one end of the shielding wings being disposed to be spaced apart on the frame, wherein the shielding wing is made of a radiation shielding metal. Accordingly, it is possible to easily adjust the diameter of radiation field made in a circular shape.

Abstract: The present disclosure relates to a collimator for radiation generating apparatus, attached to a radiation generating apparatus, the collimator comprising: a frame fixed to the radiation generating apparatus and formed in a ring shape; and a shielding adjustment part provided with a plurality of shielding wings, one end of the shielding wings being hinged to the frame such that, when rotated, the other end of the shielding wings enters into a center of the frame, and the each one end of the shielding wings being disposed to be spaced apart on the frame, wherein the shielding wing is made of a radiation shielding metal. Accordingly, it is possible to easily adjust the diameter of radiation field made in a circular shape.

Abstract: Disclosed is a radiation shield for a radiotherapy apparatus including guide grooves formed at widthwise opposite ends of a bed in a lengthwise direction, the radiation shield including a shielding body including a sheet-type lower shielding portion made of a radiation shielding material and sheet-type upper shielding portions extending from widthwise opposite ends of the lower shielding portion, respectively, and made of a radiation shielding material; and guide members formed at the widthwise opposite ends of the lower shielding portion on one surface of the lower shielding portion and inserted into the guide grooves of the radiotherapy apparatus, respectively. Therefore, the disclosed radiation shield can demonstrate an excellent radiation shielding effect and is easily manageable during radiotherapy treatment.

Abstract: A machine for folding a side curtain airbag which has a simpler machine configuration and is more efficient than a fully automatic machine and that can fold a large-capacity side curtain airbag cushion of approximately 4.0 m in length to sufficiently secure quality stability, and a process for folding a side curtain airbag by using the same, are provided.

Abstract: A memory device includes gate electrode layers stacked on top of each other on a substrate, a channel region on a cell region of the substrate and extending through the gate electrode layers in a direction perpendicular to an upper surface of the substrate, cell contacts connected to the gate electrode layers, an active region on a peripheral circuit region of the substrate, planar gate electrode layers on the peripheral circuit region and adjacent to the active region, a cover layer on the active region, and peripheral contacts connected to the active region and the planar gate electrode layers. At least a portion of the peripheral contacts are separated from the cover layer above the planar gate electrode layers.

Abstract: A polyester fiber that can be used for an airbag fabric is disclosed. The polyester fiber has an elongation of 1.65% to 2.5% when tensile strength of 1.0 g/d is applied after heat treatment at 185° C. for 2 minutes, and additionally elongates in the range of elongation from 0.5% to 5% at the range of tensile strength from 8.0 g/d to the maximum strength. The polyester fiber simultaneously has low initial Young's modulus and excellent mechanical properties, and thus, it may provide excellent packing, dimensional stability, and excellent air cut-off effect, and simultaneously, minimize impact applied to a passenger thus safely protecting a passenger.

Abstract: A memory device includes a plurality of gate electrode layers, an interlayer insulating layer, a plurality of contact plugs, and at least one contact insulating layer. The gate electrode layers extend in a first direction and have different lengths to form a step structure. The interlayer insulating layer is on the gate electrode layers. The contact plugs are connected to the gate electrode layers through the interlayer insulating layer. The at least one contact insulating layer is within the interlayer insulating layer and surrounds one or more of the contact plugs. The at least one contact insulating layer extends in the first direction.

Abstract: The present invention relates to an airbag cushion and an airbag system including the same, and particularly to an airbag cushion, including: at least one fabric; and seam parts connecting the fabric, wherein deviation of upper seam thread length per a unit length of the fabric between the first seam part sewed in forward direction and the second seam part sewed in reverse direction in the seam parts is 15% or less, a method of preparing the same, and an airbag system including the same. The airbag cushion of the present invention is superior in working stability and unfolding performance because of the optimized properties of the seam parts, provides superior shape stability and air-tight effect at the same time, and can protect a passenger by minimizing the shock given to the passenger.

Abstract: A memory device includes gate electrode layers stacked on top of each other on a substrate, a channel region on a cell region of the substrate and extending through the gate electrode layers in a direction perpendicular to an upper surface of the substrate, cell contacts connected to the gate electrode layers, an active region on a peripheral circuit region of the substrate, planar gate electrode layers on the peripheral circuit region and adjacent to the active region, a cover layer on the active region, and peripheral contacts connected to the active region and the planar gate electrode layers. At least a portion of the peripheral contacts are separated from the cover layer above the planar gate electrode layers.

Abstract: The present invention relates to a polyester fiber that can be applied to a fabric for airbag, particularly, to a polyester fiber having an elongation of 0.4% or less at the stress of 1.0 g/d, an enlongation of 4.0% or less at the stress of 4.0 g/d, and an enlongation of 7.0% or less at the stress of 7.0 g/d, and an initial modulus of 105 to 130 g/d; a method of preparing the same; and a fabric for airbag prepared therefrom. Since the polyester fiber of the present invention decreases stiffness remarkably and secures superior mechanical properties by having a high strength, high elongation, and high shrinkage, it is possible to provide superior packing property, dimensional stability, and air-tight effect, and to protect passengers safely by minimizing the impact applied to the passengers, when it is used for the fabric for airbag.

Abstract: A memory device includes a plurality of gate electrode layers, an interlayer insulating layer, a plurality of contact plugs, and at least one contact insulating layer. The gate electrode layers extend in a first direction and have different lengths to form a step structure. The interlayer insulating layer is on the gate electrode layers. The contact plugs are connected to the gate electrode layers through the interlayer insulating layer. The at least one contact insulating layer is within the interlayer insulating layer and surrounds one or more of the contact plugs. The at least one contact insulating layer extends in the first direction.

Abstract: Disclosed is a brake friction material for stainless steel brake discs, as a non-asbestos-based organic friction material not including asbestos. The brake friction material can enhance braking characteristics and wear resistance of a stainless steel brake disc. The brake friction material for stainless steel discs comprises a fiber base, a binder, a filler and a friction modifier. In particular, the friction modifier is included in an amount of about 10 to 22% by volume based on the total volume of the brake friction material composition and comprises zirconium oxide (ZrO2), iron oxide (FeO), graphite (C), tin (Sn) powder and alumina (Al2O3).

Abstract: A method for fabricating a semiconductor device is provided. In the method, a first hard mask layer is formed on a stepped structure. The first hard mask layer has a level top surface and thickness sufficient to etch the structure. A second hard mask pattern is formed on the first hard mask layer. The first hard mask layer is etched using the second hard mask pattern. Size dispersion of the patterns may be reduced by the first hard mask layer.

Abstract: A polyester fiber suitable for an airbag fabric has an elongation of 0.8 to 2.0% under a tensile strength of 1.0 g/d at the room temperature, and an additional elongation of 1.5 to 5% under a tensile strength of 8.8 g/d to the maximum. The polyester fiber secures low initial Young's modulus and good mechanical properties and can be used in an airbag fabric not only to provide excellences in air sealing effect as well as packing property and dimensional stability but also to minimize collision impacts on occupants, thereby protecting the occupants with safety.

Abstract: A machine for folding a side curtain airbag which has a simpler machine configuration and is more efficient than a fully automatic machine and that can fold a large-capacity side curtain airbag cushion of approximately 4.0 m in length to sufficiently secure quality stability, and a process for folding a side curtain airbag by using the same, are provided.

Abstract: In a semiconductor device, parallel first and second conductive lines having a unit width extend from a memory cell region into a connection region. A trim region in the connection region includes pads respectively connected to the first and second conductive lines but are separated by a width much greater than the unit width.

Abstract: A method of forming micropatterns separated over a misalignment margin includes forming a first mold pattern including a main pattern and a separation-assist pattern, forming a first spacer mask having a first width around the first mold pattern, forming a second mold pattern using the first spacer mask as an etch mask, forming a second spacer mask having a second width around the second mold pattern, and forming a target pattern using the second spacer mask as an etch mask.

Abstract: An upper and lower tray apparatus for manufacturing a denture of the present invention includes: upper and lower main trays fitted on upper and lower gums in a mouth of a patient; upper and lower auxiliary trays coupled to or separated from occluding portions of the upper main tray and the lower main tray; and a tray adjustment unit disposed between the upper main tray and the lower main tray and adjusting horizontality and height of the upper and lower main trays to fit the patient so that the gums are comfortable around a condyle in the mouth of the patient.

Abstract: An artificial teeth articulator according to the present invention has a structure comprising: a height control means installed between a holder and a table, for controlling the height of the table installed on a base plate and a top plate by using the holder; a width control means installed on the table, for controlling individually from five directions the width of a tray seated on the table so that the periphery of the tray is held by means of pressing force; and a jaw gap control means installed so that the horizontal tilt of the table can be individually controlled from three different directions through graduations formed on a support rod, when supporting the table by vertically sliding along the outer circumference of the support rod.