Abstract: There is provided a subminiature imaging optical system utilizing only three sheets of lenses having positive, negative and positive refractive powers, respectively. The subminiature imaging optical system comprising, sequentially from an object side: a first lens having a meniscus shape with a convex object-side surface, the first lens having at least one apherical surface and positive refractive power; a second lens having a meniscus shape with a convex image-side surface, the second lens having at least one spherical surface and negative refractive power; and a third lens having both surfaces formed of an aspherical surface and having positive refractive power.

Abstract: A subminiature imaging optical system including: first, second, third and fourth lenses sequentially positioned from an object side to an image side, the first lens having positive refractivity, the second lens having a concave image-side surface and having negative refractivity, the third lens having negative refractivity, and the fourth lens having positive refractivity, wherein the second lens satisfies following condition 1, and the third lens satisfies following condition 2, 20<V2<50 condition 1, 20<V3<50 condition 2, where V2 is an Abbe number of the second lens and V3 is an Abbe number of the third lens.

Abstract: A regulator comprises a body including an inflow line, an outflow line, and a buffer space, the buffer space being provided between the inflow line and the outflow line, and a switch for opening and closing a flow path of a fluid flowing from the inflow line to the buffer space. The switch comprises a seat member including an inlet for receiving the fluid from the inflow line, and an outlet for supplying the fluid received through the inlet to the buffer space, the seat member being disposed in the flow path and a movable cutoff member for opening and closing the inlet, the cutoff member being inserted into the seat member, wherein the outlet is configured for allowing the fluid to flow in one direction along an outer sidewall of the seat member.

Abstract: The present invention relates to a variable focus lens. The variable focus lens comprises a fluid chamber having a protrusion formed along one opened end thereof. The fluid chamber is cylindrically shaped to house first and second non-miscible fluids therein, and the first and second fluids have different refractive indices. A transparent element hermetically is coupled with the opened end of the chamber with a predetermined gap from the protrusion of the chamber. A first electrode is disposed inside the chamber to act on the first fluid, and a second electrode is insulated from the first electrode. The variable focus lens can be easily fabricated to prevent bubble formation with the protrusion formed at the opened end of the chamber.

Abstract: The invention provides a variable focus liquid lens using electrowetting, comprising a conductive first liquid and an insulating second liquid. At least one of the first liquid composed of electrolyte and the second liquid composed of insulating liquid contains a surfactant for reducing interfacial energy between the first and second liquids. An interfacial portion between the first and second liquids is gathered by surfactant to reduce driving voltage. The variable focus liquid lens according to the invention has about 50% lower driving voltage required for changing focus, ensuring stability of the two fluids.

Abstract: The present invention relates to a voice mail system (VMS), and more particularly, to a system and method for unifying multiple connection ports of a voice mail system. A system according to the present invention includes an external input/output controller (EIOC) provided between a VMS having a plurality of boards that perform the same function and a plurality of external servers. The EIOC is adapted to provide an unified network connection point between the plurality of boards and the plurality of external servers by routing a message transferred from any one of the plurality of boards to any one of the external servers. The EIOC is also configured to route a message transferred from any one of the plurality of external servers to a corresponding board of the VMS. The stability of such a system is increased by making external servers (IP networks) regard the VMS as a single network connection point.

Abstract: A regulator comprises a body including an inflow line, an outflow line, and a buffer space, the buffer space being provided between the inflow line and the outflow line, and a switch for opening and closing a flow path of a fluid flowing from the inflow line to the buffer space. The switch comprises a seat member including an inlet for receiving the fluid from the inflow line, and an outlet for supplying the fluid received through the inlet to the buffer space, the seat member being disposed in the flow path and a movable cutoff member for opening and closing the inlet, the cutoff member being inserted into the seat member, wherein the outlet is configured for allowing the fluid to flow in one direction along an outer sidewall of the seat member.

Abstract: Disclosed is a method for fabricating a semiconductor device by using a PECYCLE-CVD process. The method includes the steps of feeding source gas into a process chamber for predetermined time within one cycle, allowing reaction gas to flow in the process chamber at least until a plasma reaction is finished in the process chamber and feeding purge gas into the process chamber for a predetermined time within one cycle, thereby purging residual products remaining in the process chamber after source gas is reacted, forming plasma in the process chamber for a predetermined time within one cycle so as to allow reaction gas to react with plasma, thereby depositing a thin film on a wafer, and feeding purge gas into the process chamber for a predetermined time within one cycle, thereby purging residual products remaining in the process chamber after reaction gas is reacted. Superior step-coverage and uniformity of the thin film are achieved while depositing the thin film at a higher speed.

Abstract: It is provided a wood flooring laminated wood and plastic layers symmetric to each other and method of manufacturing the same. The wood flooring has an upper layer including laminated wood, a core layer including plastic sheets manufactured by calendaring, and a lower layer including veneer board, the lower layer being made of the same material as the upper layer, which are piled up symmetrically in order to keep the balance between the upper layer and lower layer, and then integrated under a constant temperature and pressure to form a suitable layers made by wood and plastic, thereby providing natural feeling in surface and solving the problem of distortion according to the change of environment.

Abstract: The present invention relates to a new plastic flooring that is assembled by concave portions and convex portions. The plastic flooring provides space between the concave portions and convex portions. The space absorbs the heat expansion of the plastic flooring such that the deformation of the plastic flooring is prevented. Also, the space stores an adhesive on a bottom floor such that crevices between the plastic flooring are prevented.

Abstract: Disclosed is an electrocatalyst for fuel cells, in which a porous carbon material including pores having a diameter smaller than a kinetic diameter of carbon monoxide is used as a support body and contact probability between an activated metal and carbon monoxide is decreased, thereby preventing fuel cell performance from being degraded by carbon monoxide. The electrocatalyst is obtained by adsorbing 10-80 parts by weight of an activated metal to 20-90 parts by weight of a porous support body, characterized in that the porous support body has a total surface area of 200-2,500 m2/g including an outer surface thereof and an inner surface of pores thereof, and has a plurality of pores penetrating into an interior of the support body with an average diameter of 2-15 nm and a total volume of 0.4-2.0 m3/g, and the activated metal is alloyed with 20-95 at % of platinum and 5-80 at % of one metal selected from among Ru, Sn, Os, Rh, Ir, Pd, V, Cr, Co, Ni, Fe and Mn.

Abstract: Disclosed is a method for fabricating a semiconductor device by using a PECYCLE-CVD process. The method includes the steps of feeding source gas into a process chamber for predetermined time within one cycle, allowing reaction gas to flow in the process chamber at least until a plasma reaction is finished in the process chamber and feeding purge gas into the process chamber for a predetermined time within one cycle, thereby purging residual products remaining in the process chamber after source gas is reacted, forming plasma in the process chamber for a predetermined time within one cycle so as to allow reaction gas to react with plasma, thereby depositing a thin film on a wafer, and feeding purge gas into the process chamber for a predetermined time within one cycle, thereby purging residual products remaining in the process chamber after reaction gas is reacted. Superior step-coverage and uniformity of the thin film are achieved while depositing the thin film at a higher speed.

Abstract: Disclosed is a light unit used for backlighting a display device such as an LCD panel, which emits perpendicularly-directed white surface light by using lateral monochromatic light. The light unit of the invention comprises: a monochromatic light source for emitting monochromatic light; a light guide plate placed at the side of the monochromatic light source, and having a hologram pattern formed on at least one of front and rear faces oriented perpendicular to incident light introduced from the monochromatic light source for emitting light in a direction substantially perpendicular to the incidence direction of light; and a fluorescent layer applied on the front face of the light guide plate for converting perpendicularly-directed emitted light into white light.

Abstract: A structure for reducing noise and vibration in a scroll compressor includes an outer casing connected with a suction pipe and a discharge pipe respectively. The scroll compressor also includes an inner casing combined with the inner circumferential surface of the outer casing, a driving motor combined with the inner circumferential surface of the inner casing for generating a rotational force, a driving shaft combined with a rotor for transmitting the rotational force, a fixed scroll for forming a plurality of compression pockets which continuously move and which is combined with an orbiting scroll orbiting eccentrically with the driving shaft.

Abstract: Disclosed is a new plastic flooring that is assembled by concave portions and convex portions. The plastic flooring provides space between the concave portions and convex portions. The space absorbs the heat expansion of the plastic flooring such that the deformation of the plastic flooring is prevented. Also, the space stores an adhesive on a bottom floor such that crevices between the plastic flooring are prevented.

Abstract: The present invention relates to a method and apparatus for inputting secret information by using multiple screen pointers. Specifically, the present invention relates to the method and apparatus which prevents the third party from detecting or recognizing the contents of the information directed to a certain system through the network and its input process. In accordance with the present invention, the method of inputting secret information by using multiple screen pointers comprises the displaying multiple screen pointers including at least two screen pointers each of which is identified by each of at least two identification symbols, respectively, defining a plurality of character regions each of which is corresponds to each of a plurality of characters, respectively, and receiving selection of at least two of the character regions by a user wherein the selection is performed by using the multiple screen pointers.

Abstract: A structure for reducing noise and vibration of a scroll compressor, including an outer casing connected-combined with a suction pipe and discharge pipe respectively, an inner casing combined with the inner circumferential surface of the outer casing, a driving motor combined with the inner circumferential surface of the inner casing, for generating a rotation force, a driving shaft combined with a rotor for transmitting the rotation force, a fixed scroll for forming a plurality of compression pockets which continuously move, combined with an orbiting scroll orbiting eccentrically combined with the driving shaft and the orbiting scroll and forming a discharge port, a frame fixed-combined on the inner circumferential surface of the inner casing, for supporting the driving shaft and an elastic supporting means for elastically supporting both ends of the outer casing and inner casing can efficiently reduce noise and vibration generated in the whole compressor by attenuating the noise and vibration generated in c

Abstract: A method for inputting secret information by using and information processing system which comprises means for detecting events and display means, is provided. The method comprises the displaying at least two characters separately on the display means, displaying screen multi-pointers comprising at least tow screen pointers separately on screen of the display means, moving at least two screen pointers on the screen of the display means, and recording information associated with the screen multi-pointers in response to the second event detected by the detecting means.

Abstract: Disclosed is an optical mouse which can move a cursor on a display screen of a computer system by varying arrangement of optical parts and structures using regularly reflected light in light emitted from a light source so as to allow the regularly reflected light to enter into a sensor. The optical mouse includes a light source for emitting light, an irradiating lens for condensing the light emitted from the light source and downwardly irradiating the light at a predetermined angle, a light-receiving lens for condensing light regularly reflected upon a reflecting surface on a path where light emitted from the light source and irradiated through the irradiating lens is reflected, and an optical sensor for sensing the light condensed through the light-receiving lens.

Abstract: Novel 4,5-diamino pyrimidine derivatives are described by the following general formula I: in which X is a direct bond, C1-4 alkylene, C1-4 alkyleneoxy, C1-4 alkoxyphenyl or phenyl C1-4 alkylene; Y is a direct bond or C1-2 alkyl, R1 is (i) 5-15 membered cyclic or fused heterocompound which includes one or two atoms selected from a group consisting of nitrogen, oxygen and sulfur and which is substituted with one or two substituents selected from a group consisting of hydrogen, halogen, nitro, hydroxy, C1-6 alkyl, C3-6 alkenyl and halogen C1-4 alkoxy, (ii) C4-10 carbocyclic compound or (iii) hydroxy C1-4 alkoxy, R2 is 5-15 membered cyclic or fused heterocompound which includes one or two nitrogen atoms and, optionally, one oxygen or sulfur atom, and which is substituted with one or two substituents selected from a group consisting of hydrogen, hydroxy, halogen, nitro, hydroxy C1-5 alkyl, C1-6 alkyl, C3-6 alkenyl and halogen C1-4 alkoxy; R3 is hydrogen, in which R4 and R5 are