Abstract: A method and an apparatus for transmitting and receiving data in a filter bank based multicarrier communication system are provided. The method includes receiving a plurality of data blocks and performing an Inverse Fast Fourier Transform (IFFT) operation on the plurality of data blocks, multiplying the plurality of data blocks on which IFFT has been performed and time axis filter coefficients, and transmitting a result obtained by adding the plurality of multiplied data blocks as a multi carrier signal.

Abstract: A charge and discharge test probe for a secondary battery includes: an inner plunger moved up and down by elastic force of a spring; a head having a central through hole through which the inner plunger passes to protrude from an upper end of the head; and a first conductive elastic member mounted to the head.

Abstract: A mixed image device having a portable structure which includes a case, a mounting holder configured to mounting a small image device on a rear end of the case in a vertical direction, a reflector formed in a square shape on the front surface of the mounting holder to reflect the image upward, a translucent mirror formed in a square shape on the upper end of the reflector to reflect the image of the small image device such as a smart phone and having a reflectance ratio of 8:2 to 2:8, a handle configured at the front end of the case, and a controller configured at one end of the handle to adjust the image of the small image device. A user can simultaneously observe a neighboring environment reality scene and augmented image provided from the small image device by the translucent mirror while carrying the structure of the device.

Abstract: A memory system includes: an ECC unit suitable for generating third data by correcting second data and a third DBI flag by correcting a second DBI flag, based on the second data, the second DBI flag, and a second parity, which are provided through a channel; a DBI unit suitable for generating fourth data by determining whether a plurality of third data bits respectively corresponding to a plurality of DBI flag bits constituting the third DBI flag are inverted, based on the third data and the third DBI flag; and a DM unit suitable for generating a DM flag indicating whether a write operation is performed on a plurality of fourth data bits constituting the fourth data, based on the second data

Abstract: A walking system that includes a walking dish formed in any one of a circular shape, a semi-circular shape, and a polygonal shape; a rolling ball formed on an upper surface of a ball fixing device; multiple auxiliary balls having multiple rolling balls on the surface of the walking dish and formed below the rolling ball so that the rolling ball smoothly rotates in all directions in 360 degrees; the ball fixing device fixing the auxiliary ball and the rolling ball while allowing the auxiliary ball and the rolling ball to rotate in all directions in 360 degrees; and a ball fixing table formed with the ball fixing device for joining the multiple ball fixing devices on the inclined surface at a predetermined interval to allow a user to walk in all directions in 360 degrees according to a virtual reality or walking motion image.

Abstract: A screen structure including the first, second, and third screens, and a hall structure in which a table, a chair, a staircase, and a serving passage are configured in one structure. Multiple tables and chairs are disposed in one viewing direction of the first screen on a front and each table and chair are configured in each staircase structure, the serving passage is configured on a front end of each table, the first screen is provided on the front of the viewing direction of the multiple tables, and the second and third screens are configured in left and right directions of the multiple tables, respectively and a screen size is configured so that a horizontal viewing angle is 180° or more and a vertical viewing angle is 100° or more, including a local illumination that limitedly illuminates the top of the table at an upper end.

Abstract: A transdermal delivery system of drug and a method of preparing the same are provided. More specifically, the invention can be a transdermal delivery system applied for various protein drugs such as vaccines and chemical drugs, because the drug delivery system has a biocompatibility, biodegradation property, transdermal delivery property, the safety of human body, maximum activity of protein drugs, good bio-conjugation efficiency and a long-term efficacy, a method of preparing the same and its use.

Abstract: An audio-visual system may include a housing comprising an open upper end and a storage space, an audio-visual device installed inside the housing and exposable through the open upper end, and a lifting device configured to expose or store the audio-visual device inside the housing through the open upper end. The audio-visual device may include a display, a speaker, and a processor configured to control the audio-visual system to operate in a first mode for outputting media art content while the display is stored in the housing according to a first event, operate in a second mode for outputting audio content through the speaker while part of the display is exposed through the open upper end according to a second event, and operate in a third mode for outputting a visual content while the entire display is exposed through the open upper end according to a third event.

Abstract: A light detection and ranging (LiDAR) optical system, according to one embodiment of the present invention, comprises: a first mirror which is disposed to make a predetermined first angle with a horizontal plane and has a first hollow; a light source for outputting a pulse laser from the lower portion of the first mirror; a second mirror which is disposed to make a predetermined second angle with the first mirror so that the pulse laser passes through the first hollow and travels to a measurement target; at least two path control mirrors which reflect the pulse laser so that the path of the pulse laser is formed on a reflective surface of the second mirror; a light receiving lens for receiving, from the lower portion of the first mirror, light which has been reflected through the first mirror.

Abstract: A polyurethane filter foam is provided herein. The polyurethane filter foam may have improved permeability by having both a small cell and a large cell in a range for maximizing the opening property of the foam. In some instance, this is achieved by specifically configuring and foaming a composition of polyether polyol and methylene diphenyl diisocyanate (MDI) to manufacture the polyurethane foam. The polyurethane foam of the present invention can be manufactured without performing a reticulation process.

Abstract: The present invention relates to a head and neck simulation phantom device for simulating the head and neck of a body, the phantom device including: a flat type first plate having a first insertion groove formed on one surface thereof; a flat type second plate disposed to come into contact with the other surface of the first plate and having a second insertion groove formed on the contacted surface with the other surface of the first plate in such a manner as to correspond to the first insertion groove; and a plurality of teeth simulants inserted into the first insertion groove and the second insertion groove and for simulating the teeth of the body.

Abstract: A pulse restoration circuit includes: a voltage restorator configured to include an OP amplifier and input an input voltage to an input terminal of the OP amplifier; a rising time restorator configured to be connected to the other input terminal of the OP amplifier; and a falling time restorator configured to be connected to an output terminal of the OP amplifier, whereby it is possible to improve a reduction in performance of the medical image electronics transmitting an analog signal via the cable and a PET detector of a PET-MRI convergence system among the medical image electronics by correcting a distortion phenomenon of an output signal depending on a cable length into the original signal using the pulse restoration circuit.

Abstract: Disclosed is a method of manufacturing various alloy thin films, in which nano-scale cracks are controlled, with desired compositions using an ultrasonic pulse electroforming process. The method includes a step of forming a multilayer that includes two or more different thin metal film layers, in which nano-scale cracks due to hydrogen generation are controlled, a step of ultimately facilitating interdiffusion by controlling the thickness of the multilayer to a nano-scale thickness through pulse application and the number of layers forming the multilayer, and controlling an alloy to have a desired composition through heat treatment, and a step of thermally treating the multilayer such that interdiffusion sufficiently occurs among the two or more different thin metal film layers. The step of thermally treating may be carried out along with rolling, whereby very fine cracks may be removed by compression and, accordingly, alloy foils having various compositions may be economically produced.

Abstract: An embodiment relates to a light-emitting device comprising: a light-emitting structure which comprises a first conductive semiconductor layer, a second conductive semiconductor layer, and an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer, and comprises a plurality of first recesses passing through the second conductive semiconductor layer and active layer and disposed on a part of an area of the first conductive semiconductor layer; a first electrode which is electrically connected to the first conductive semiconductor layer inside the plurality of first recesses; a conductive support substrate which is electrically connected to the first electrode; a second electrode which is electrically connected to the second conductive semiconductor layer; and an insulating layer which is disposed between the conductive support substrate and second conductive semiconductor layer, wherein a second recess passes through the first conductive semiconducto

Abstract: An embodiment provides a light emitting element comprising: a light emitting structure including a first conductive semiconductor layer, an active layer on the first conductive semiconductor layer, and a second conductive semiconductor layer on the active layer; a plurality of conductor layers selectively arranged on the second conductive semiconductor layer; and a reflective electrode disposed on the conductor layers and the second conductive semiconductor layer.

Abstract: Embodiments disclose a light-emitting device including a light-emitting structure including a first conductive semiconductor layer, a second conductive semiconductor layer, an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer, and a first recess and a second recess passing through the second conductive semiconductor layer and the active layer and disposed up to a partial region of the first conductive semiconductor layer, a connection electrode disposed inside the first recess and electrically connected to the first conductive semiconductor layer, a reflective layer disposed inside the second recess, and an insulation layer configured to electrically insulate the reflective layer and the light-emitting structure, and a light-emitting device package including the same.

Abstract: Embodiments of the present disclosure relate to a robot cleaner and a control method of the robot cleaner, more particularly, to a robot cleaner configured to correct position information of the robot cleaner by acquiring a position of a docking station during the robot clear drives and to correct a map by using corrected position information, and a control method of the robot cleaner.